I have the following lines of code to access data through CoreData.
import Foundation
import CoreData
import CloudKit
class CoreDataManager {
static let instance = CoreDataManager()
let container: NSPersistentCloudKitContainer
let context: NSManagedObjectContext
init() {
container = NSPersistentCloudKitContainer(name: "ABC")
container.loadPersistentStores(completionHandler: { (storeDescription, error) in
if let error = error as NSError? {
print(error.userInfo)
}
})
context = container.viewContext
context.automaticallyMergesChangesFromParent = true
context.mergePolicy = NSMergePolicy(merge: .mergeByPropertyObjectTrumpMergePolicyType)
}
func save() {
do {
try container.viewContext.save()
print("Saved successfully")
} catch {
print("Error in saving data: \(error.localizedDescription)")
}
}
}
I have confirmed that I can share data between iPhone and iPad. Now, I need to use AppGroup as well. I have changed my code as follows.
import Foundation
import CoreData
import CloudKit
class CoreDataManager {
static let shared = CoreDataManager()
let container: NSPersistentContainer
let context: NSManagedObjectContext
init() {
container = NSPersistentCloudKitContainer(name: "ABC")
container.persistentStoreDescriptions = [NSPersistentStoreDescription(url: FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "some group name")!.appendingPathComponent("CoreDataMama.sqlite"))]
container.loadPersistentStores(completionHandler: { (description, error) in
if let error = error as NSError? {
print("Unresolved error \(error), \(error.userInfo)")
}
})
context = container.viewContext
context.automaticallyMergesChangesFromParent = true
context.mergePolicy = NSMergePolicy(merge: .mergeByPropertyObjectTrumpMergePolicyType)
}
func save() {
do {
try container.viewContext.save()
print("Saved successfully")
} catch {
print("Error in saving data: \(error.localizedDescription)")
}
}
}
Other files being unaltered, my sample apps aren't sharing data. What am I doing wrong? Just FYI, I'm using actual devices. Thank you for your reading this topic.
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