“NSPersistentCloudKitContainer”

I've similar concerns. The contexts from the first container will not be useable (at least in my testing). Short of tearing down the old core data stack, standing up the new one and traversing the view hierarchy to replace all existing managed objects and managed object contexts, there doesn't seem to be a way to toggle sync using NSPersistentCloudKitContainer. Not being able to pause or toggle sync seems to be a real shortcoming with NSPersistentCloudKitContainer. For kicks, I tried just disabling iCloud for the app Settings->AppleID->iCloud->App but that just deleted all the data on the device. I can live with the eventual consistency and not knowing sync progress, but not being able to toggle sync is a show stopper.

Hi cristosv, Thanks for posting your solution to this online. I'm having the same problem, but it would be great it for you could help a little more. For example, all your code is working fine, but I can't seem to figure out how to use my core data entity in a Text() view in my widget. Below is my code, and any help with this or more sample code would be great. Thanks 🙏 import WidgetKit import SwiftUI import Intents import CoreData struct Provider: IntentTimelineProvider { func placeholder(in context: Context) -> SimpleEntry { SimpleEntry(date: Date(), configuration: ConfigurationIntent()) } func getSnapshot(for configuration: ConfigurationIntent, in context: Context, completion: @escaping (SimpleEntry) -> ()) { let entry = SimpleEntry(date: Date(), configuration: configuration) completion(entry) } func getTimeline(for configuration: ConfigurationIntent, in context: Context, completion: @escaping (Timeline) -> ()) { var entries: [SimpleEntry] = [] // Generate a timeline consisting of five entries an

Thanks @nigelfromtewkesbury that worked for me, too. Also led me to persistence.swift:34 where you can change the name of the data model it looks for: container = NSPersistentCloudKitContainer(name: YourContainerName)

I was able to remove the warnings by registering a new value transformer. I'm persisting a CLLocation, which conforms to NSSecureCoding. import Foundation import CoreLocation @objc(CLLocationValueTransformer) final class CLLocationValueTransformer: NSSecureUnarchiveFromDataTransformer { static let name = NSValueTransformerName(rawValue: String(describing: CLLocationValueTransformer.self)) override static var allowedTopLevelClasses: [AnyClass] { return [CLLocation.self] } public static func register() { let transformer = CLLocationValueTransformer() ValueTransformer.setValueTransformer(transformer, forName: name) } } Adding CLLocationValueTransformer as the transformer name works without warnings. The value is synced properly via NSPersistentCloudKitContainer, verified on multiple devices.

CKDatabaseScopeShared is not supported with NSPersistentCloudKitContainer?

No. NSPersistentCloudKitContainer does not use queries in the private database, only the public.

https://developer.apple.com/documentation/coredata/nspersistentcloudkitcontainer/3343548-initializecloudkitschemawithopti?language=objc

NSPersistentCloudKitContainer never supported unique constraints. In iOS 14 we made this a lot more obvious.

I wanted to give this thread a bump because I too am facing the same issue. The proposed answer from rr0924, and the referenced article from Antoine van der Lee, does not work for me either. To inject my CoreData model into the Widget extension one failing attempt I've tried was to use a similar method in my iOS app and watchOS companion app. For example this code will allow proper access to CoreData from iOS and watchOS; @main struct RunRosterApp: App { @Environment(.scenePhase) private var scenePhase @StateObject private var persistentStore = PersistentStore.shared var body: some Scene { WindowGroup { ContentView() .environment(.managedObjectContext, persistentStore.context) } } The PersistentStore class is a set up as a singleton to load the NSPersistentCloudKitContainer. That code is fairly boiler plate so I won't post it but can upon request. Using a similar pattern in WidgetKit and SwiftUI I currently have this; @main struct WidgetRunPlanner: Widget { @StateObject private var persistentStore =

I'll make a guess you are implementing your App struct as if it were a class and accidentally creating a new instance of NSPersistentCloudKitContainer every time SwiftUI recreates the struct. You could access the persistent container lazy property through a @UIApplicationDelegateDelegateAdaptor so it is only created once. import SwiftUI import CoreData @main struct MasterDetailApp: App { t@UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate tt ttvar body: some Scene { ttttWindowGroup { ttttttContentView().environment(.managedObjectContext, appDelegate.persistentContainer.viewContext) tttt} tt} }