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Library not loaded: /System/Library/Frameworks/SwiftUICore.framework/SwiftUICore
Hello. I'm building an iOS application that builds a framework named Design.framework using Xcode 16.1. When I launch my application on iOS 17.X, i get the following runtime error dyld[47899]: Library not loaded: /System/Library/Frameworks/SwiftUICore.framework/SwiftUICore Referenced from: <E625A246-E36B-351A-B077-CC38BAB5E07B> /Users/v/Library/Developer/Xcode/DerivedData/iScribd-bexojbdreldwkvbpzioqueldnvng/Build/Products/Debug_AppStore-iphonesimulator/Design.framework/Design Reason: tried: '/Users/v/Library/Developer/Xcode/DerivedData/iScribd-bexojbdreldwkvbpzioqueldnvng/Build/Products/Debug_AppStore-watchsimulator/SwiftUICore.framework/SwiftUICore' (no such file), '/Users/v/Library/Developer/Xcode/DerivedData/iScribd-bexojbdreldwkvbpzioqueldnvng/Build/Products/Debug_AppStore-iphonesimulator/SwiftUICore.framework/SwiftUICore' (no such file), '/Users/v/Library/Developer/Xcode/DerivedData/iScribd-bexojbdreldwkvbpzioqueldnvng/Build/Products/Debug_AppStore-watchsimulator/PackageFrameworks/SwiftUICore.framework/SwiftUICore' (no such file), '/Users/v/Library/Developer/Xcode/DerivedData/iScribd-bexojbdreldwkvbpzioqueldnvng/Build/Products/Debug_AppStore-iphonesimulator/PackageFrameworks/SwiftUICore.framework/SwiftUICore' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_21C62/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 17.2.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/SwiftUICore.framework/SwiftUICore' (no such file), '/System/Library/Frameworks/SwiftUICore.framework/SwiftUICore' (no such file, not in dyld cache), '/Library/Developer/CoreSimulator/Volumes/iOS_21C62/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 17.2.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/SwiftUICore.framework/SwiftUICore' (no such file) This error does not happen on iOS 18+. When i run dyld_info Design.framework/Design, i see that there is indeed a dependency on SwiftUICore.framework Design.framework/Design [arm64]: -platform: platform minOS sdk iOS-simulator 16.0 18.1 -uuid: 09880F25-DC86-3D8E-BCAE-1A283508D879 -segments: load-offset segment section sect-size seg-size max-prot init-prot 0x00000000 __TEXT 416KB r.x 0x00000000 __TEXT 416KB r.x 0x0000543C __text 355508 0x0005C0F0 __stubs 3168 0x0005CD50 __objc_methlist 32 0x0005CD70 __const 8296 0x0005EDD8 __swift5_typeref 15820 0x00062BB0 __cstring 6885 0x00064698 __constg_swiftt 2804 0x0006518C __swift5_builtin 40 0x000651C0 __swift5_reflstr 2952 0x00065D48 __swift5_assocty 816 0x00066078 __objc_methname 299 0x000661A4 __swift5_proto 368 0x00066314 __swift5_types 280 0x0006642C __swift5_fieldmd 3688 0x00067294 __swift5_protos 8 0x0006729C __swift5_capture 244 0x00067390 __unwind_info 2296 0x00067C88 __eh_frame 888 0x00068000 __DATA_CONST 16KB rw. 0x00068000 __DATA_CONST 16KB rw. 0x00068000 __got 3704 0x00068E78 __const 6864 0x0006A948 __objc_classlist 40 0x0006A970 __objc_imageinfo 8 0x0006C000 __DATA 32KB rw. 0x0006C000 __DATA 32KB rw. 0x0006C000 __objc_const 792 0x0006C318 __objc_selrefs 96 0x0006C378 __objc_classrefs 48 0x0006C3A8 __objc_data 208 0x0006C478 __data 4136 0x0006D4A0 __bss 12784 0x00070690 __common 4592 -linked_dylibs: attributes load path @rpath/CommonTools.framework/CommonTools /System/Library/Frameworks/Foundation.framework/Foundation /usr/lib/libobjc.A.dylib /usr/lib/libSystem.B.dylib /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation /System/Library/Frameworks/CoreGraphics.framework/CoreGraphics /System/Library/Frameworks/CoreText.framework/CoreText weak-link /System/Library/Frameworks/DeveloperToolsSupport.framework/DeveloperToolsSupport /System/Library/Frameworks/SwiftUI.framework/SwiftUI /System/Library/Frameworks/SwiftUICore.framework/SwiftUICore /System/Library/Frameworks/UIKit.framework/UIKit /usr/lib/swift/libswiftCore.dylib weak-link /usr/lib/swift/libswiftCoreAudio.dylib /usr/lib/swift/libswiftCoreFoundation.dylib weak-link /usr/lib/swift/libswiftCoreImage.dylib weak-link /usr/lib/swift/libswiftCoreMedia.dylib weak-link /usr/lib/swift/libswiftDarwin.dylib weak-link /usr/lib/swift/libswiftDataDetection.dylib weak-link /usr/lib/swift/libswiftDispatch.dylib weak-link /usr/lib/swift/libswiftFileProvider.dylib weak-link /usr/lib/swift/libswiftMetal.dylib weak-link /usr/lib/swift/libswiftOSLog.dylib /usr/lib/swift/libswiftObjectiveC.dylib weak-link /usr/lib/swift/libswiftQuartzCore.dylib weak-link /usr/lib/swift/libswiftSpatial.dylib weak-link /usr/lib/swift/libswiftUniformTypeIdentifiers.dylib weak-link /usr/lib/swift/libswiftXPC.dylib /usr/lib/swift/libswift_Concurrency.dylib weak-link /usr/lib/swift/libswiftos.dylib weak-link /usr/lib/swift/libswiftsimd.dylib weak-link /usr/lib/swift/libswiftUIKit.dylib I can add a -weak_framework SwiftUICore to "Other Linker Flags" in my Design.framework Build Settings, and that will solve my problem, but I'd like to know what prompts my Design.framework to depend on SwiftUICore despite having a minimum set to iOS 16? And how am I supposed to handle devices prior to iOS 18 which do not have this library? is adding the linker flag the right way forward?
Topic: UI Frameworks SubTopic: SwiftUI
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1.5k
Apr ’25
tvOS: Using .onExitCommand to Navigate to Home Tab Before Exiting — Is This Acceptable?
Hi Apple Developer Team, In my tvOS app built with SwiftUI, I have a tab-based interface with several sections. The first tab (index 0) is the Home tab. Other tabs include Contact, WiFi, Welcome, etc. I want to handle the remote's Menu / Back button (.onExitCommand) so that: If the user is on any tab other than Home (tabs 1, 2, 3, etc.), pressing the Menu button takes them back to the Home tab. If the user is already on the Home tab, then pressing the TV/Home button (not Menu) behaves as expected — suspending or exiting the app (handled by the system, no code involved). Here's a simplified version of what I implemented: .onExitCommand { if selectedTab != 0 { selectedTab = 0 focusedTab = 0 } else { // Let system handle the exit when user presses the TV/Home button } } This behavior ensures users don’t accidentally exit the app when they're browsing other tabs, and provides a consistent navigation experience. Question: Is this an acceptable and App Store-compliant use of .onExitCommand on tvOS? I'm not calling exit(0) or trying to force-terminate the app — just using .onExitCommand for in-app navigation purposes. Any official guidance or best practices would be greatly appreciated! Thanks, Prashant
Topic: UI Frameworks SubTopic: SwiftUI Tags:
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107
May ’25
-applicationDockMenu: method on NSApplicationDelegate doesn't work when attached to debugger
When I add a simple menu to the dock via the NSApplicationDelegate method -applicationDockMenu: and run the app from Xcode it doesn't work. -(NSMenu*)applicationDockMenu:(NSApplication*)sender { NSMenu *dockMenu = [self buildDockMenu]; if (dockMenu != nil) { NSLog(@"Returning dock menu."); return dockMenu; } else { NSLog(@"Not ready to build dock menu"); return nil; } } When I run the app, my main app window shows up but nothing logs out in -applicationDockMenu: until I click outside my app's window (so if I click the desktop background, or a Finder window, or whatever). Then after I click outside my app's main window this logs out: Returning dock menu. The "Not ready to build dock menu" message does not log out. But...when I right click on the dock icon, the menu doesn't show up. But if I stop the app from Xcode and just run it not attached to the debugger, the dock menu does show up. But this makes the debugging/testing situation not ideal.
3
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180
May ’25
FamilyActivityTitleView Label has wrong text color when app is using different than system theme
Hello, In a new app I am working on I noticed the FamilyActivityTitleView that displays "ApplicationToken" has wrong (black) color when phone is set to light mode but app is using dark mode via override. We display user's selected apps and the labels are rendered correctly at first, but then when user updates selection with FamilyActivityPicker, then those newly added apps are rendered with black titles. The problem goes away when I close the screen and open it again. It also doesn't happen when phone is set to dark theme. I am currently noticing the issue on iOS 18.4.1. I have tried various workarounds like forcing white text in the custom label style, forcing re-render with custom .id value but nothing helped. Is there any way how to fix this?
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142
May ’25
searchable isPresented set too late in a sheet
I have a popover/sheet in iOS which allows users to search and add items to a list. When the sheet is shown, the search should always be active. I am using searchable on a NavigationStack inside the sheet. I am using the isPresented parameter to activate search. My issue is with the animation of the search activation. Even if I use... isPresented: .constant(true) ...the search isn't activated until the sheet has completed it's entrance animation, resulting in two stages of animation. I can't add a video here, but the two images below show the steps I am seeing. First a slide up animation, with the search in the navigation drawer, then a second animation, once the sheet is fully in place, as the search becomes active. Is it possible to merge these two animations, so search is in place when the sheet animates up?
Topic: UI Frameworks SubTopic: SwiftUI
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55
Apr ’25
Best Way to Help Users Diagnose iOS App Crashes with No UI Feedback
Hi all, We're working on an iOS application and would like to improve our ability to diagnose failures - especially in scenarios where the app crashes before it can present any UI to the user. A few specific questions: In case of an exception or crash, is there a way to log the issue so the user (or our support team) can understand the cause of the failure? If the app crashes abruptly (e.g., due to a runtime exception or crash during launch), is there a recommended way to persist error information before the process terminates? Are there Apple-supported mechanisms (like crash reporting tools or APIs) we can integrate that would help us capture such issues? What’s the best practice for enabling support teams to assist users based on crash reports - especially for crashes that happen before any user interaction? Our goal is to make sure users aren't left in the dark if the app fails to start, and to allow us to deliver timely updates or support based on the cause of the crash. Thanks in advance for your guidance!
Topic: UI Frameworks SubTopic: General Tags:
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111
May ’25
Unexpected UINavigationBar Behavior During View Transitions in iOS 18
In iOS 18, I've observed unexpected behavior related to the UINavigationBar when transitioning between view controllers that have differing navigation bar visibility settings. Specifically, when returning from a modal presentation or a web view, the navigation bar reappears with an unexpected height (e.g., 103 points) and lacks content, displaying only an empty bar. Start with a UIViewController (e.g., HomeViewController) where the navigation bar is hidden using: override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) navigationController?.setNavigationBarHidden(true, animated: animated) } Present another UIViewController (e.g., a web view) modally. Dismiss the presented view controller. Observe that upon returning to HomeViewController, the navigation bar is visible with increased height and lacks expected content. Expected Behavior: The navigation bar should remain hidden upon returning to HomeViewController, maintaining the state it had prior to presenting the modal view controller. Actual Behavior: Upon dismissing the modal view controller, the navigation bar becomes visible with an unexpected height and lacks content, leading to a disrupted user interface. Additional Observations: This issue is specific to iOS 18; it does not occur in iOS 17 or earlier versions. The problem seems to stem from setting the navigation bar to be visible in the viewWillDisappear method, as shown below: override func viewWillDisappear(_ animated: Bool) { super.viewWillDisappear(animated) navigationController?.setNavigationBarHidden(false, animated: animated) } Removing or modifying this line mitigates the issue, suggesting a change in the view controller lifecycle behavior in iOS 18. Request for Clarification: Is this change in behavior intentional in iOS 18, or is it a regression? Understanding whether this is a new standard or a bug will help in implementing appropriate solutions. Workaround: As a temporary measure, I've adjusted the navigation bar visibility settings to avoid changing its state in viewWillDisappear, instead managing it in viewWillAppear or viewDidAppear. References: Similar issues have been discussed in the Apple Developer Forums: iPad OS 18 UINavigationBar display incorrectly
Topic: UI Frameworks SubTopic: UIKit
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118
May ’25
Use Custom UIApplication Subclass with SwiftUI
I have a SwiftUI app which needs the Ivanti AppConnect SDK. The docs only show how to integrate it into a Swift/UIKit app. But I need it to work with SwiftUI. I probably could make a UIKit base app and then load my existing SwiftUI views and code through a SwiftUI component host or something. But I'd like to avoid that if possible. Here is where I'm stuck: The AppConnect framework loads through a custom UIApplication subclass in the main.swift file: import Foundation import AppConnect UIApplicationMain( CommandLine.argc, CommandLine.unsafeArgv, ACUIApplicationClassName, NSStringFromClass(AppDelegate.self) ) The startup works as expected, and the expected function is called in the AppDelegate class: func application( _ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {...} However, the SwiftUI view is not loaded and the scree stays blank. I implemented a SceneDelegate.swift class which doesn't seem to be called. Also, the following function in the AppDelegate doesn't get called either: func application( _ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {...} So how do I bootstrap SwiftUI with a custom UIApplication class? can that be done with the @main macro somehow? I'm still pretty new to Swift and iOS development. Any help is appreciated
Topic: UI Frameworks SubTopic: SwiftUI Tags:
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79
May ’25
iOS18 iPad Custom UITabBar invalid
After my XCode was upgraded to 16.2, the custom bottom tabbar of iPadAPP could not be displayed properly (I set "traitOverrides.horizontalSizeClass = .compact", otherwise the tabbar would be displayed at the top and it was not the style I wanted) Below are my code and pictures of the running effects of iOS17 and iOS18 override func viewDidLoad() { super.viewDidLoad() setValue(CustomTabBar(), forKey: "tabBar") if #available(iOS 18.0, *) { self.mode = .tabBar self.traitOverrides.horizontalSizeClass = .compact } } } class CustomTabBar: UITabBar { var leftView = UIView() var rightView = UIView() override func sizeThatFits(_ size: CGSize) -> CGSize { var sizeThatFits = super.sizeThatFits(size) sizeThatFits.height = 60 // 自定义高度 return sizeThatFits } override func layoutSubviews() { super.layoutSubviews() self.backgroundColor = .red addSubview(leftView) addSubview(rightView) leftView.backgroundColor = .green leftView.frame = CGRect(x: 10, y: 4, width: 80, height: 40) rightView.backgroundColor = .green rightView.frame = CGRect(x: 600, y: 4, width: 80, height: 40) } } ![]("https://aninterestingwebsite.com/forums/content/attachment/66988297-26dc-4b40-af37-103f6a277563" "title=20250409151648.jpg;width=2394;height=1716")
Topic: UI Frameworks SubTopic: UIKit
4
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290
Apr ’25
AppIntent complie issue & manual remove AppIntent dialog
1.When I attempted to open the subsequent AppIntent within the perform method of the AppIntent instance, I always received the following error: How to solve the problems of inconsistency of this type? I couldn't find any sample code. 2.When I used method 'Button(intent: OpenAppIntent())' to open my app through the dialog custom view of AppIntent, but I couldn't find a way to close this AppIntent dialog. How can i remove this dialog?
Topic: UI Frameworks SubTopic: General
2
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85
May ’25
Extra Trailing Closure for List {}
I am a little lost. Why is Xcode complaining of this. Everything looks right here. I even removed my code and copy-pasted Apple's sample from here - https://aninterestingwebsite.com/documentation/swiftui/list Clean built and still get this. Not using List removes the error.
4
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105
Apr ’25
iOS UILabel textAlignment .justified results in wrong rect by layoutManager.boundingRect
I have a UILabel subclass showing NSAttributedString in which I need to draw a rounded rectangle background color around links: import UIKit class MyLabel: UILabel { private var linkRects = [[CGRect]]() private let layoutManager = NSLayoutManager() private let textContainer = NSTextContainer(size: .zero) private let textStorage = NSTextStorage() override func draw(_ rect: CGRect) { let path = UIBezierPath() linkRects.forEach { rects in rects.forEach { linkPieceRect in path.append(UIBezierPath(roundedRect: linkPieceRect, cornerRadius: 2)) } } UIColor.systemGreen.withAlphaComponent(0.4).setFill() path.fill() super.draw(rect) } override init(frame: CGRect) { super.init(frame: frame) setup() } required init?(coder: NSCoder) { super.init(coder: coder) setup() } private func setup() { numberOfLines = 0 adjustsFontForContentSizeCategory = true isUserInteractionEnabled = true lineBreakMode = .byWordWrapping contentMode = .redraw clearsContextBeforeDrawing = true isMultipleTouchEnabled = false backgroundColor = .red.withAlphaComponent(0.1) textContainer.lineFragmentPadding = 0 textContainer.maximumNumberOfLines = numberOfLines textContainer.lineBreakMode = lineBreakMode textContainer.layoutManager = layoutManager layoutManager.textStorage = textStorage layoutManager.addTextContainer(textContainer) textStorage.addLayoutManager(layoutManager) } override func layoutSubviews() { super.layoutSubviews() calculateRects() } private func calculateRects(){ linkRects.removeAll() guard let attributedString = attributedText else { return } textStorage.setAttributedString(attributedString) let labelSize = frame.size textContainer.size = labelSize layoutManager.ensureLayout(for: textContainer) let textBoundingBox = layoutManager.usedRect(for: textContainer) print("labelSize: \(labelSize)") print("textBoundingBox: \(textBoundingBox)") var wholeLineRanges = [NSRange]() layoutManager.enumerateLineFragments(forGlyphRange: NSRange(0 ..< layoutManager.numberOfGlyphs)) { _, rect, _, range, _ in wholeLineRanges.append(range) print("Whole line: \(rect), \(range)") } attributedString.enumerateAttribute(.link, in: NSRange(location: 0, length: attributedString.length)) { value, clickableRange, _ in if value != nil { var rectsForCurrentLink = [CGRect]() wholeLineRanges.forEach { wholeLineRange in if let linkPartIntersection = wholeLineRange.intersection(clickableRange) { var rectForLinkPart = layoutManager.boundingRect(forGlyphRange: linkPartIntersection, in: textContainer) rectForLinkPart.origin.y = rectForLinkPart.origin.y + (textContainer.size.height - textBoundingBox.height) / 2 // Adjust for vertical alignment rectsForCurrentLink.append(rectForLinkPart) print("Link rect: \(rectForLinkPart), \(linkPartIntersection)") } } if !rectsForCurrentLink.isEmpty { linkRects.append(rectsForCurrentLink) } } } print("linkRects: \(linkRects)") setNeedsDisplay() } } And I use this as such: let label = MyLabel() label.setContentHuggingPriority(.required, for: .vertical) label.setContentHuggingPriority(.required, for: .horizontal) view.addSubview(label) label.snp.makeConstraints { make in make.width.lessThanOrEqualTo(view.safeAreaLayoutGuide.snp.width).priority(.required) make.horizontalEdges.greaterThanOrEqualTo(view.safeAreaLayoutGuide).priority(.required) make.center.equalTo(view.safeAreaLayoutGuide).priority(.required) } let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.alignment = .justified let s = NSMutableAttributedString(string: "Lorem Ipsum: ", attributes: [.font: UIFont.systemFont(ofSize: 17, weight: .regular), .paragraphStyle: paragraphStyle]) s.append(NSAttributedString(string: "This property controls the maximum number of lines to use in order to fit the label's text into its bounding rectangle.", attributes: [.link: URL(string: "https://news.ycombinator.com/") as Any, .foregroundColor: UIColor.link, .font: UIFont.systemFont(ofSize: 14, weight: .regular), .paragraphStyle: paragraphStyle])) label.attributedText = s Notice the paragraphStyle.alignment = .justified This results in: As you can see, the green rect background is starting a bit further to the right and also ending much further to the right. If I set the alignment to be .left or .center, then it gives me the correct rects: Also note that if I keep .justified but change the font size for the "Lorem Ipsom:" part to be a bit different, lets say 16 instead of 17, then it gives me the correct rect too: Also note that if we remove some word from the string, then also it starts giving correct rect. It seems like if the first line is too squished, then it reports wrong rects. Why is .justified text alignment giving me wrong rects? How can I fix it?
Topic: UI Frameworks SubTopic: UIKit
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104
May ’25
UICollectionView Dequeue Crash Xcode 16.2
I am facing same issue with major crash while coming out from this function. Basically using collectionView.dequeReusableCell with size calculation. func getSizeOfFavouriteCell(_ collectionView: UICollectionView, at indexPath: IndexPath, item: FindCircleInfoCellItem) -> CGSize { guard let dummyCell = collectionView.dequeueReusableCell( withReuseIdentifier: TAButtonAddCollectionViewCell.reuseIdentifier, for: indexPath) as? TAButtonAddCollectionViewCell else { return CGSize.zero } dummyCell.title = item.title dummyCell.subtitle = item.subtitle dummyCell.icon = item.icon dummyCell.layoutIfNeeded() var targetSize = CGSize.zero if viewModel.favoritesDataSource.isEmpty.not, viewModel.favoritesDataSource.count > FindSheetViewControllerConstants.minimumFavoritesToDisplayInSection { targetSize = CGSize(width: collectionView.frame.size.width / 2, height: collectionView.frame.height) var estimatedSize: CGSize = dummyCell.systemLayoutSizeFitting(targetSize) if estimatedSize.width > targetSize.width { estimatedSize.width = targetSize.width } return CGSize(width: estimatedSize.width, height: targetSize.height) } } We have resolve issue with size calculation with checking nil. Working fine in xcode 15 and 16+. Note: Please help me with reason of crash? Is it because of xCode 16.2 onwards **strict check on UICollectionView **
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155
Apr ’25
Scene for my "Application's Menu About "My Application""
I am using SwiftUI to create an app and I have figured out how to present a scene for my preferences window. However I have yet to find a way to modify the "About "My App"" scene. I am not even sure how to ask the question on other forums because I keep getting informations on application menus. I would like to find information on accessing/changing other menu entries in the menubar (in SwiftUI) an most specifically I would like to find out how to present a custom window (or at least custom information) when the user selects "About "My App"" I guess I don't need a solution but a pointer to documentation that will help me in my quest.
3
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1.1k
Apr ’25
how to get subviews of a SwiftUI view in UIKit environment
I have a SwiftUI view that I have wrapped using UIHostingController for use within UIKit. Requirement: Within the UIKit environment, I want to get all the subviews of this SwiftUI view and determine whether the images within those subviews have finished loading. For UIKit views, we can use view.subviews to get all the subviews and do the check. However, for SwiftUI views, I found that the view.subviews turns out to be an empty array, making it impossible to do further checks. So the question is How can I get the subviews of a SwiftUI view?
2
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131
May ’25
Navbar buttons disappear in NavigationSplitView's sidebar when changing apps
We recently migrated our app to use NavigationSplitView on iPad with a sidebar and detail setup, and we got reports that the navigation buttons on the sidebar disappear when returning to our app after using a different app. I reproduced the issue from a new empty project with the following code (issue tested on iOS 17.4 and iOS 18.3, was not able to reproduce on iOS 16.4): import SwiftUI @main struct TestApp: App { var body: some Scene { WindowGroup { NavigationSplitView { Text("sidebar") .toolbar { ToolbarItem(placement: .topBarLeading) { Button(action: {}) { Image(systemName: "square.and.arrow.down") } } ToolbarItem(placement: .topBarTrailing) { Button(action: {}) { Image(systemName: "square.and.arrow.up") } } } } detail: { Text("detail") .toolbar { ToolbarItem(placement: .topBarLeading) { Button(action: {}) { Image(systemName: "eraser") } } ToolbarItem(placement: .topBarTrailing) { Button(action: {}) { Image(systemName: "pencil") } } } } } } } Please check the following GIF for the simple steps, notice how the navbar buttons in the detail view do not disappear: Here's the console output, it shows that the constraints break internally:
0
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130
Apr ’25
Live Activity animate without updating data
Is it actually possible to display animation (even a simple one) on Live Activity? But on these cases: The main app is terminated - of course, I know I can use the main app to keep updating the Live Activity to make simple animations work, but in this case, the main app is killed. Live Activity data is not updating - I also understand that the Live Activity can perform animations when its data is being update via push notification or other means, but the current case is the data is not being updated. I’ve tried several ways to achieve this, but nothing seems to work. Just when I was about to give up, I found this video from Apple’s official channel: https://www.youtube.com/watch?v=m6WMwSj_EbA At 4:14 in this video, you can see the text "Locating Driver" with the breathing animation. Could someone please help me understand how to implement that kind of animation in a Live Activity when: The main app is not running, and The Live Activity data is not updating?
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149
Apr ’25
Launch App with Siri on a locked device
We are looking at the possibility of launching our app through Siri with a locked device. We have the device responding to our App Intent but it is asking to be unlocked first. If the device is locked the intent works perfectly. It just doesn't seem to respect the set intentAuthenticationPolicy. Thank you for you time looking into this. We have set these var to .alwaysAllowed and open to true. static var authenticationPolicy: IntentAuthenticationPolicy = .alwaysAllowed static var openAppWhenRun: Bool = true Here is our full test code: import AppIntents import SwiftUI // MARK: - App Intents struct OpenAppIntent: AppIntent { static var title: LocalizedStringResource = "Open Main App" static var description: IntentDescription? = .init(stringLiteral: "Opens the App") static var authenticationPolicy: IntentAuthenticationPolicy = .alwaysAllowed static var openAppWhenRun: Bool = true func perform() async throws -> some IntentResult { print("App opened") return .result() } } struct TestAppShortcutProvider: AppShortcutsProvider { static var appShortcuts: [AppShortcut] { AppShortcut( intent: OpenAppIntent(), phrases: [ "Begin \(.applicationName)" ], shortTitle: "Open App", systemImageName: "popcorn.fill" ) } }
1
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128
Apr ’25
Inconsistent ornament scale
I am developing an application which make use of 2 ornaments anchored to a volumetric window, one used a toolbar and one to display different views. The problem I am facing consistently is that the ornaments seems to scale up or down after moving the volume using the OS handle or starting a GroupActivity session. This first image shows the ornaments as soon as I started the app, no dragging nor group activities: This second images shows them as soon as I join a group activity session: The map, which might seem smaller, has not been touched and has always the same scale. In this last image I had just dragged the entire volume using the OS toolbar, resulting in the ornaments scaling down: This is how the volume and the ornaments are declared: WindowGroup(id: "CityVolume") { let cityVM = CityViewModel(volumeSize: CityView.initialVolumeSize) CityView(cityVM: cityVM) .ornament(attachmentAnchor: .scene(.bottomFront)) { HStack { TourismChartsButton() LandmarksListButton() CenterMapButton() ToggleImmersiveSpaceButton() TrafficDataButton() BusLinesButton() } .padding() .offset(z: 10) .rotation3DEffect(Angle(degrees: 15), axis: (x: 1.0, y: 0.0, z: 0.0)) } .ornament(attachmentAnchor: .scene(.back)) { ZStack { if AppModel.Instance.tourismVM.isChartViewVisible { TourismChartsView() } if AppModel.Instance.busLinesVM.isDataViewEnabled { BusLineView() } } } .task(observeGroupActivity) .onAppear { appModel.cityVM = cityVM } } .windowStyle(.volumetric) .windowResizability(.contentSize) .volumeWorldAlignment(.gravityAligned) .defaultSize(CityView.initialVolumeSize, in: .meters) It happens also without starting a SharePlay session, but not as frequently as during SharePlay. Experienced the same behaviour with toolbars. Am I doing something wrong with how I created the ornaments? Am I missing something?
0
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106
Apr ’25
Library not loaded: /System/Library/Frameworks/SwiftUICore.framework/SwiftUICore
Hello. I'm building an iOS application that builds a framework named Design.framework using Xcode 16.1. When I launch my application on iOS 17.X, i get the following runtime error dyld[47899]: Library not loaded: /System/Library/Frameworks/SwiftUICore.framework/SwiftUICore Referenced from: <E625A246-E36B-351A-B077-CC38BAB5E07B> /Users/v/Library/Developer/Xcode/DerivedData/iScribd-bexojbdreldwkvbpzioqueldnvng/Build/Products/Debug_AppStore-iphonesimulator/Design.framework/Design Reason: tried: '/Users/v/Library/Developer/Xcode/DerivedData/iScribd-bexojbdreldwkvbpzioqueldnvng/Build/Products/Debug_AppStore-watchsimulator/SwiftUICore.framework/SwiftUICore' (no such file), '/Users/v/Library/Developer/Xcode/DerivedData/iScribd-bexojbdreldwkvbpzioqueldnvng/Build/Products/Debug_AppStore-iphonesimulator/SwiftUICore.framework/SwiftUICore' (no such file), '/Users/v/Library/Developer/Xcode/DerivedData/iScribd-bexojbdreldwkvbpzioqueldnvng/Build/Products/Debug_AppStore-watchsimulator/PackageFrameworks/SwiftUICore.framework/SwiftUICore' (no such file), '/Users/v/Library/Developer/Xcode/DerivedData/iScribd-bexojbdreldwkvbpzioqueldnvng/Build/Products/Debug_AppStore-iphonesimulator/PackageFrameworks/SwiftUICore.framework/SwiftUICore' (no such file), '/Library/Developer/CoreSimulator/Volumes/iOS_21C62/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 17.2.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/SwiftUICore.framework/SwiftUICore' (no such file), '/System/Library/Frameworks/SwiftUICore.framework/SwiftUICore' (no such file, not in dyld cache), '/Library/Developer/CoreSimulator/Volumes/iOS_21C62/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 17.2.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/SwiftUICore.framework/SwiftUICore' (no such file) This error does not happen on iOS 18+. When i run dyld_info Design.framework/Design, i see that there is indeed a dependency on SwiftUICore.framework Design.framework/Design [arm64]: -platform: platform minOS sdk iOS-simulator 16.0 18.1 -uuid: 09880F25-DC86-3D8E-BCAE-1A283508D879 -segments: load-offset segment section sect-size seg-size max-prot init-prot 0x00000000 __TEXT 416KB r.x 0x00000000 __TEXT 416KB r.x 0x0000543C __text 355508 0x0005C0F0 __stubs 3168 0x0005CD50 __objc_methlist 32 0x0005CD70 __const 8296 0x0005EDD8 __swift5_typeref 15820 0x00062BB0 __cstring 6885 0x00064698 __constg_swiftt 2804 0x0006518C __swift5_builtin 40 0x000651C0 __swift5_reflstr 2952 0x00065D48 __swift5_assocty 816 0x00066078 __objc_methname 299 0x000661A4 __swift5_proto 368 0x00066314 __swift5_types 280 0x0006642C __swift5_fieldmd 3688 0x00067294 __swift5_protos 8 0x0006729C __swift5_capture 244 0x00067390 __unwind_info 2296 0x00067C88 __eh_frame 888 0x00068000 __DATA_CONST 16KB rw. 0x00068000 __DATA_CONST 16KB rw. 0x00068000 __got 3704 0x00068E78 __const 6864 0x0006A948 __objc_classlist 40 0x0006A970 __objc_imageinfo 8 0x0006C000 __DATA 32KB rw. 0x0006C000 __DATA 32KB rw. 0x0006C000 __objc_const 792 0x0006C318 __objc_selrefs 96 0x0006C378 __objc_classrefs 48 0x0006C3A8 __objc_data 208 0x0006C478 __data 4136 0x0006D4A0 __bss 12784 0x00070690 __common 4592 -linked_dylibs: attributes load path @rpath/CommonTools.framework/CommonTools /System/Library/Frameworks/Foundation.framework/Foundation /usr/lib/libobjc.A.dylib /usr/lib/libSystem.B.dylib /System/Library/Frameworks/CoreFoundation.framework/CoreFoundation /System/Library/Frameworks/CoreGraphics.framework/CoreGraphics /System/Library/Frameworks/CoreText.framework/CoreText weak-link /System/Library/Frameworks/DeveloperToolsSupport.framework/DeveloperToolsSupport /System/Library/Frameworks/SwiftUI.framework/SwiftUI /System/Library/Frameworks/SwiftUICore.framework/SwiftUICore /System/Library/Frameworks/UIKit.framework/UIKit /usr/lib/swift/libswiftCore.dylib weak-link /usr/lib/swift/libswiftCoreAudio.dylib /usr/lib/swift/libswiftCoreFoundation.dylib weak-link /usr/lib/swift/libswiftCoreImage.dylib weak-link /usr/lib/swift/libswiftCoreMedia.dylib weak-link /usr/lib/swift/libswiftDarwin.dylib weak-link /usr/lib/swift/libswiftDataDetection.dylib weak-link /usr/lib/swift/libswiftDispatch.dylib weak-link /usr/lib/swift/libswiftFileProvider.dylib weak-link /usr/lib/swift/libswiftMetal.dylib weak-link /usr/lib/swift/libswiftOSLog.dylib /usr/lib/swift/libswiftObjectiveC.dylib weak-link /usr/lib/swift/libswiftQuartzCore.dylib weak-link /usr/lib/swift/libswiftSpatial.dylib weak-link /usr/lib/swift/libswiftUniformTypeIdentifiers.dylib weak-link /usr/lib/swift/libswiftXPC.dylib /usr/lib/swift/libswift_Concurrency.dylib weak-link /usr/lib/swift/libswiftos.dylib weak-link /usr/lib/swift/libswiftsimd.dylib weak-link /usr/lib/swift/libswiftUIKit.dylib I can add a -weak_framework SwiftUICore to "Other Linker Flags" in my Design.framework Build Settings, and that will solve my problem, but I'd like to know what prompts my Design.framework to depend on SwiftUICore despite having a minimum set to iOS 16? And how am I supposed to handle devices prior to iOS 18 which do not have this library? is adding the linker flag the right way forward?
Topic: UI Frameworks SubTopic: SwiftUI
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Apr ’25
tvOS: Using .onExitCommand to Navigate to Home Tab Before Exiting — Is This Acceptable?
Hi Apple Developer Team, In my tvOS app built with SwiftUI, I have a tab-based interface with several sections. The first tab (index 0) is the Home tab. Other tabs include Contact, WiFi, Welcome, etc. I want to handle the remote's Menu / Back button (.onExitCommand) so that: If the user is on any tab other than Home (tabs 1, 2, 3, etc.), pressing the Menu button takes them back to the Home tab. If the user is already on the Home tab, then pressing the TV/Home button (not Menu) behaves as expected — suspending or exiting the app (handled by the system, no code involved). Here's a simplified version of what I implemented: .onExitCommand { if selectedTab != 0 { selectedTab = 0 focusedTab = 0 } else { // Let system handle the exit when user presses the TV/Home button } } This behavior ensures users don’t accidentally exit the app when they're browsing other tabs, and provides a consistent navigation experience. Question: Is this an acceptable and App Store-compliant use of .onExitCommand on tvOS? I'm not calling exit(0) or trying to force-terminate the app — just using .onExitCommand for in-app navigation purposes. Any official guidance or best practices would be greatly appreciated! Thanks, Prashant
Topic: UI Frameworks SubTopic: SwiftUI Tags:
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May ’25
-applicationDockMenu: method on NSApplicationDelegate doesn't work when attached to debugger
When I add a simple menu to the dock via the NSApplicationDelegate method -applicationDockMenu: and run the app from Xcode it doesn't work. -(NSMenu*)applicationDockMenu:(NSApplication*)sender { NSMenu *dockMenu = [self buildDockMenu]; if (dockMenu != nil) { NSLog(@"Returning dock menu."); return dockMenu; } else { NSLog(@"Not ready to build dock menu"); return nil; } } When I run the app, my main app window shows up but nothing logs out in -applicationDockMenu: until I click outside my app's window (so if I click the desktop background, or a Finder window, or whatever). Then after I click outside my app's main window this logs out: Returning dock menu. The "Not ready to build dock menu" message does not log out. But...when I right click on the dock icon, the menu doesn't show up. But if I stop the app from Xcode and just run it not attached to the debugger, the dock menu does show up. But this makes the debugging/testing situation not ideal.
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May ’25
FamilyActivityTitleView Label has wrong text color when app is using different than system theme
Hello, In a new app I am working on I noticed the FamilyActivityTitleView that displays "ApplicationToken" has wrong (black) color when phone is set to light mode but app is using dark mode via override. We display user's selected apps and the labels are rendered correctly at first, but then when user updates selection with FamilyActivityPicker, then those newly added apps are rendered with black titles. The problem goes away when I close the screen and open it again. It also doesn't happen when phone is set to dark theme. I am currently noticing the issue on iOS 18.4.1. I have tried various workarounds like forcing white text in the custom label style, forcing re-render with custom .id value but nothing helped. Is there any way how to fix this?
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May ’25
searchable isPresented set too late in a sheet
I have a popover/sheet in iOS which allows users to search and add items to a list. When the sheet is shown, the search should always be active. I am using searchable on a NavigationStack inside the sheet. I am using the isPresented parameter to activate search. My issue is with the animation of the search activation. Even if I use... isPresented: .constant(true) ...the search isn't activated until the sheet has completed it's entrance animation, resulting in two stages of animation. I can't add a video here, but the two images below show the steps I am seeing. First a slide up animation, with the search in the navigation drawer, then a second animation, once the sheet is fully in place, as the search becomes active. Is it possible to merge these two animations, so search is in place when the sheet animates up?
Topic: UI Frameworks SubTopic: SwiftUI
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Apr ’25
Best Way to Help Users Diagnose iOS App Crashes with No UI Feedback
Hi all, We're working on an iOS application and would like to improve our ability to diagnose failures - especially in scenarios where the app crashes before it can present any UI to the user. A few specific questions: In case of an exception or crash, is there a way to log the issue so the user (or our support team) can understand the cause of the failure? If the app crashes abruptly (e.g., due to a runtime exception or crash during launch), is there a recommended way to persist error information before the process terminates? Are there Apple-supported mechanisms (like crash reporting tools or APIs) we can integrate that would help us capture such issues? What’s the best practice for enabling support teams to assist users based on crash reports - especially for crashes that happen before any user interaction? Our goal is to make sure users aren't left in the dark if the app fails to start, and to allow us to deliver timely updates or support based on the cause of the crash. Thanks in advance for your guidance!
Topic: UI Frameworks SubTopic: General Tags:
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May ’25
Unexpected UINavigationBar Behavior During View Transitions in iOS 18
In iOS 18, I've observed unexpected behavior related to the UINavigationBar when transitioning between view controllers that have differing navigation bar visibility settings. Specifically, when returning from a modal presentation or a web view, the navigation bar reappears with an unexpected height (e.g., 103 points) and lacks content, displaying only an empty bar. Start with a UIViewController (e.g., HomeViewController) where the navigation bar is hidden using: override func viewWillAppear(_ animated: Bool) { super.viewWillAppear(animated) navigationController?.setNavigationBarHidden(true, animated: animated) } Present another UIViewController (e.g., a web view) modally. Dismiss the presented view controller. Observe that upon returning to HomeViewController, the navigation bar is visible with increased height and lacks expected content. Expected Behavior: The navigation bar should remain hidden upon returning to HomeViewController, maintaining the state it had prior to presenting the modal view controller. Actual Behavior: Upon dismissing the modal view controller, the navigation bar becomes visible with an unexpected height and lacks content, leading to a disrupted user interface. Additional Observations: This issue is specific to iOS 18; it does not occur in iOS 17 or earlier versions. The problem seems to stem from setting the navigation bar to be visible in the viewWillDisappear method, as shown below: override func viewWillDisappear(_ animated: Bool) { super.viewWillDisappear(animated) navigationController?.setNavigationBarHidden(false, animated: animated) } Removing or modifying this line mitigates the issue, suggesting a change in the view controller lifecycle behavior in iOS 18. Request for Clarification: Is this change in behavior intentional in iOS 18, or is it a regression? Understanding whether this is a new standard or a bug will help in implementing appropriate solutions. Workaround: As a temporary measure, I've adjusted the navigation bar visibility settings to avoid changing its state in viewWillDisappear, instead managing it in viewWillAppear or viewDidAppear. References: Similar issues have been discussed in the Apple Developer Forums: iPad OS 18 UINavigationBar display incorrectly
Topic: UI Frameworks SubTopic: UIKit
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May ’25
Use Custom UIApplication Subclass with SwiftUI
I have a SwiftUI app which needs the Ivanti AppConnect SDK. The docs only show how to integrate it into a Swift/UIKit app. But I need it to work with SwiftUI. I probably could make a UIKit base app and then load my existing SwiftUI views and code through a SwiftUI component host or something. But I'd like to avoid that if possible. Here is where I'm stuck: The AppConnect framework loads through a custom UIApplication subclass in the main.swift file: import Foundation import AppConnect UIApplicationMain( CommandLine.argc, CommandLine.unsafeArgv, ACUIApplicationClassName, NSStringFromClass(AppDelegate.self) ) The startup works as expected, and the expected function is called in the AppDelegate class: func application( _ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey : Any]? = nil) -> Bool {...} However, the SwiftUI view is not loaded and the scree stays blank. I implemented a SceneDelegate.swift class which doesn't seem to be called. Also, the following function in the AppDelegate doesn't get called either: func application( _ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {...} So how do I bootstrap SwiftUI with a custom UIApplication class? can that be done with the @main macro somehow? I'm still pretty new to Swift and iOS development. Any help is appreciated
Topic: UI Frameworks SubTopic: SwiftUI Tags:
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May ’25
iOS18 iPad Custom UITabBar invalid
After my XCode was upgraded to 16.2, the custom bottom tabbar of iPadAPP could not be displayed properly (I set "traitOverrides.horizontalSizeClass = .compact", otherwise the tabbar would be displayed at the top and it was not the style I wanted) Below are my code and pictures of the running effects of iOS17 and iOS18 override func viewDidLoad() { super.viewDidLoad() setValue(CustomTabBar(), forKey: "tabBar") if #available(iOS 18.0, *) { self.mode = .tabBar self.traitOverrides.horizontalSizeClass = .compact } } } class CustomTabBar: UITabBar { var leftView = UIView() var rightView = UIView() override func sizeThatFits(_ size: CGSize) -> CGSize { var sizeThatFits = super.sizeThatFits(size) sizeThatFits.height = 60 // 自定义高度 return sizeThatFits } override func layoutSubviews() { super.layoutSubviews() self.backgroundColor = .red addSubview(leftView) addSubview(rightView) leftView.backgroundColor = .green leftView.frame = CGRect(x: 10, y: 4, width: 80, height: 40) rightView.backgroundColor = .green rightView.frame = CGRect(x: 600, y: 4, width: 80, height: 40) } } ![]("https://aninterestingwebsite.com/forums/content/attachment/66988297-26dc-4b40-af37-103f6a277563" "title=20250409151648.jpg;width=2394;height=1716")
Topic: UI Frameworks SubTopic: UIKit
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Apr ’25
AppIntent complie issue & manual remove AppIntent dialog
1.When I attempted to open the subsequent AppIntent within the perform method of the AppIntent instance, I always received the following error: How to solve the problems of inconsistency of this type? I couldn't find any sample code. 2.When I used method 'Button(intent: OpenAppIntent())' to open my app through the dialog custom view of AppIntent, but I couldn't find a way to close this AppIntent dialog. How can i remove this dialog?
Topic: UI Frameworks SubTopic: General
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May ’25
Extra Trailing Closure for List {}
I am a little lost. Why is Xcode complaining of this. Everything looks right here. I even removed my code and copy-pasted Apple's sample from here - https://aninterestingwebsite.com/documentation/swiftui/list Clean built and still get this. Not using List removes the error.
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Apr ’25
iOS UILabel textAlignment .justified results in wrong rect by layoutManager.boundingRect
I have a UILabel subclass showing NSAttributedString in which I need to draw a rounded rectangle background color around links: import UIKit class MyLabel: UILabel { private var linkRects = [[CGRect]]() private let layoutManager = NSLayoutManager() private let textContainer = NSTextContainer(size: .zero) private let textStorage = NSTextStorage() override func draw(_ rect: CGRect) { let path = UIBezierPath() linkRects.forEach { rects in rects.forEach { linkPieceRect in path.append(UIBezierPath(roundedRect: linkPieceRect, cornerRadius: 2)) } } UIColor.systemGreen.withAlphaComponent(0.4).setFill() path.fill() super.draw(rect) } override init(frame: CGRect) { super.init(frame: frame) setup() } required init?(coder: NSCoder) { super.init(coder: coder) setup() } private func setup() { numberOfLines = 0 adjustsFontForContentSizeCategory = true isUserInteractionEnabled = true lineBreakMode = .byWordWrapping contentMode = .redraw clearsContextBeforeDrawing = true isMultipleTouchEnabled = false backgroundColor = .red.withAlphaComponent(0.1) textContainer.lineFragmentPadding = 0 textContainer.maximumNumberOfLines = numberOfLines textContainer.lineBreakMode = lineBreakMode textContainer.layoutManager = layoutManager layoutManager.textStorage = textStorage layoutManager.addTextContainer(textContainer) textStorage.addLayoutManager(layoutManager) } override func layoutSubviews() { super.layoutSubviews() calculateRects() } private func calculateRects(){ linkRects.removeAll() guard let attributedString = attributedText else { return } textStorage.setAttributedString(attributedString) let labelSize = frame.size textContainer.size = labelSize layoutManager.ensureLayout(for: textContainer) let textBoundingBox = layoutManager.usedRect(for: textContainer) print("labelSize: \(labelSize)") print("textBoundingBox: \(textBoundingBox)") var wholeLineRanges = [NSRange]() layoutManager.enumerateLineFragments(forGlyphRange: NSRange(0 ..< layoutManager.numberOfGlyphs)) { _, rect, _, range, _ in wholeLineRanges.append(range) print("Whole line: \(rect), \(range)") } attributedString.enumerateAttribute(.link, in: NSRange(location: 0, length: attributedString.length)) { value, clickableRange, _ in if value != nil { var rectsForCurrentLink = [CGRect]() wholeLineRanges.forEach { wholeLineRange in if let linkPartIntersection = wholeLineRange.intersection(clickableRange) { var rectForLinkPart = layoutManager.boundingRect(forGlyphRange: linkPartIntersection, in: textContainer) rectForLinkPart.origin.y = rectForLinkPart.origin.y + (textContainer.size.height - textBoundingBox.height) / 2 // Adjust for vertical alignment rectsForCurrentLink.append(rectForLinkPart) print("Link rect: \(rectForLinkPart), \(linkPartIntersection)") } } if !rectsForCurrentLink.isEmpty { linkRects.append(rectsForCurrentLink) } } } print("linkRects: \(linkRects)") setNeedsDisplay() } } And I use this as such: let label = MyLabel() label.setContentHuggingPriority(.required, for: .vertical) label.setContentHuggingPriority(.required, for: .horizontal) view.addSubview(label) label.snp.makeConstraints { make in make.width.lessThanOrEqualTo(view.safeAreaLayoutGuide.snp.width).priority(.required) make.horizontalEdges.greaterThanOrEqualTo(view.safeAreaLayoutGuide).priority(.required) make.center.equalTo(view.safeAreaLayoutGuide).priority(.required) } let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.alignment = .justified let s = NSMutableAttributedString(string: "Lorem Ipsum: ", attributes: [.font: UIFont.systemFont(ofSize: 17, weight: .regular), .paragraphStyle: paragraphStyle]) s.append(NSAttributedString(string: "This property controls the maximum number of lines to use in order to fit the label's text into its bounding rectangle.", attributes: [.link: URL(string: "https://news.ycombinator.com/") as Any, .foregroundColor: UIColor.link, .font: UIFont.systemFont(ofSize: 14, weight: .regular), .paragraphStyle: paragraphStyle])) label.attributedText = s Notice the paragraphStyle.alignment = .justified This results in: As you can see, the green rect background is starting a bit further to the right and also ending much further to the right. If I set the alignment to be .left or .center, then it gives me the correct rects: Also note that if I keep .justified but change the font size for the "Lorem Ipsom:" part to be a bit different, lets say 16 instead of 17, then it gives me the correct rect too: Also note that if we remove some word from the string, then also it starts giving correct rect. It seems like if the first line is too squished, then it reports wrong rects. Why is .justified text alignment giving me wrong rects? How can I fix it?
Topic: UI Frameworks SubTopic: UIKit
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May ’25
UICollectionView Dequeue Crash Xcode 16.2
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Apr ’25
Can the macOS Quick Look preview plugin support network capabilities?
I developed a quick look preview plugin on MacOS, and want to add some data tracking to understand user usage. However, I'm encountering errors when using network capabilities within the plugin. I want to confirm whether the preview plugin blocks network capabilities.
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May ’25
Scene for my "Application's Menu About "My Application""
I am using SwiftUI to create an app and I have figured out how to present a scene for my preferences window. However I have yet to find a way to modify the "About "My App"" scene. I am not even sure how to ask the question on other forums because I keep getting informations on application menus. I would like to find information on accessing/changing other menu entries in the menubar (in SwiftUI) an most specifically I would like to find out how to present a custom window (or at least custom information) when the user selects "About "My App"" I guess I don't need a solution but a pointer to documentation that will help me in my quest.
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Apr ’25
how to get subviews of a SwiftUI view in UIKit environment
I have a SwiftUI view that I have wrapped using UIHostingController for use within UIKit. Requirement: Within the UIKit environment, I want to get all the subviews of this SwiftUI view and determine whether the images within those subviews have finished loading. For UIKit views, we can use view.subviews to get all the subviews and do the check. However, for SwiftUI views, I found that the view.subviews turns out to be an empty array, making it impossible to do further checks. So the question is How can I get the subviews of a SwiftUI view?
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May ’25
Navbar buttons disappear in NavigationSplitView's sidebar when changing apps
We recently migrated our app to use NavigationSplitView on iPad with a sidebar and detail setup, and we got reports that the navigation buttons on the sidebar disappear when returning to our app after using a different app. I reproduced the issue from a new empty project with the following code (issue tested on iOS 17.4 and iOS 18.3, was not able to reproduce on iOS 16.4): import SwiftUI @main struct TestApp: App { var body: some Scene { WindowGroup { NavigationSplitView { Text("sidebar") .toolbar { ToolbarItem(placement: .topBarLeading) { Button(action: {}) { Image(systemName: "square.and.arrow.down") } } ToolbarItem(placement: .topBarTrailing) { Button(action: {}) { Image(systemName: "square.and.arrow.up") } } } } detail: { Text("detail") .toolbar { ToolbarItem(placement: .topBarLeading) { Button(action: {}) { Image(systemName: "eraser") } } ToolbarItem(placement: .topBarTrailing) { Button(action: {}) { Image(systemName: "pencil") } } } } } } } Please check the following GIF for the simple steps, notice how the navbar buttons in the detail view do not disappear: Here's the console output, it shows that the constraints break internally:
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Apr ’25
Live Activity animate without updating data
Is it actually possible to display animation (even a simple one) on Live Activity? But on these cases: The main app is terminated - of course, I know I can use the main app to keep updating the Live Activity to make simple animations work, but in this case, the main app is killed. Live Activity data is not updating - I also understand that the Live Activity can perform animations when its data is being update via push notification or other means, but the current case is the data is not being updated. I’ve tried several ways to achieve this, but nothing seems to work. Just when I was about to give up, I found this video from Apple’s official channel: https://www.youtube.com/watch?v=m6WMwSj_EbA At 4:14 in this video, you can see the text "Locating Driver" with the breathing animation. Could someone please help me understand how to implement that kind of animation in a Live Activity when: The main app is not running, and The Live Activity data is not updating?
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Apr ’25
Launch App with Siri on a locked device
We are looking at the possibility of launching our app through Siri with a locked device. We have the device responding to our App Intent but it is asking to be unlocked first. If the device is locked the intent works perfectly. It just doesn't seem to respect the set intentAuthenticationPolicy. Thank you for you time looking into this. We have set these var to .alwaysAllowed and open to true. static var authenticationPolicy: IntentAuthenticationPolicy = .alwaysAllowed static var openAppWhenRun: Bool = true Here is our full test code: import AppIntents import SwiftUI // MARK: - App Intents struct OpenAppIntent: AppIntent { static var title: LocalizedStringResource = "Open Main App" static var description: IntentDescription? = .init(stringLiteral: "Opens the App") static var authenticationPolicy: IntentAuthenticationPolicy = .alwaysAllowed static var openAppWhenRun: Bool = true func perform() async throws -> some IntentResult { print("App opened") return .result() } } struct TestAppShortcutProvider: AppShortcutsProvider { static var appShortcuts: [AppShortcut] { AppShortcut( intent: OpenAppIntent(), phrases: [ "Begin \(.applicationName)" ], shortTitle: "Open App", systemImageName: "popcorn.fill" ) } }
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Apr ’25
Inconsistent ornament scale
I am developing an application which make use of 2 ornaments anchored to a volumetric window, one used a toolbar and one to display different views. The problem I am facing consistently is that the ornaments seems to scale up or down after moving the volume using the OS handle or starting a GroupActivity session. This first image shows the ornaments as soon as I started the app, no dragging nor group activities: This second images shows them as soon as I join a group activity session: The map, which might seem smaller, has not been touched and has always the same scale. In this last image I had just dragged the entire volume using the OS toolbar, resulting in the ornaments scaling down: This is how the volume and the ornaments are declared: WindowGroup(id: "CityVolume") { let cityVM = CityViewModel(volumeSize: CityView.initialVolumeSize) CityView(cityVM: cityVM) .ornament(attachmentAnchor: .scene(.bottomFront)) { HStack { TourismChartsButton() LandmarksListButton() CenterMapButton() ToggleImmersiveSpaceButton() TrafficDataButton() BusLinesButton() } .padding() .offset(z: 10) .rotation3DEffect(Angle(degrees: 15), axis: (x: 1.0, y: 0.0, z: 0.0)) } .ornament(attachmentAnchor: .scene(.back)) { ZStack { if AppModel.Instance.tourismVM.isChartViewVisible { TourismChartsView() } if AppModel.Instance.busLinesVM.isDataViewEnabled { BusLineView() } } } .task(observeGroupActivity) .onAppear { appModel.cityVM = cityVM } } .windowStyle(.volumetric) .windowResizability(.contentSize) .volumeWorldAlignment(.gravityAligned) .defaultSize(CityView.initialVolumeSize, in: .meters) It happens also without starting a SharePlay session, but not as frequently as during SharePlay. Experienced the same behaviour with toolbars. Am I doing something wrong with how I created the ornaments? Am I missing something?
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Apr ’25