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how to to configure Core Data for iCloud sync in iOS 16 app

👀 Views: 3 💬 Answers: 1 📅 Created: 2025-06-05
iOS CoreData iCloud Swift

I've been banging my head against this for hours. I'm developing an iOS 16 app using Swift and trying to implement Core Data with iCloud sync for persistent storage. I've followed Apple's documentation, but I keep running into the behavior `Persistent store could not be added because the configuration is invalid.` I've set up my Core Data model and configured the NSPersistentCloudKitContainer, but it seems like the store isn't being set up correctly. My Core Data stack setup looks like this: ```swift import CoreData class CoreDataStack { static let shared = CoreDataStack() private init() {} lazy var persistentContainer: NSPersistentCloudKitContainer = { let container = NSPersistentCloudKitContainer(name: "MyAppModel") let storeURL = FileManager.default.containerURL(forSecurityApplicationGroupIdentifier: "group.my.app")?.appendingPathComponent("MyApp.sqlite") let description = NSPersistentStoreDescription(url: storeURL!) // Enabling CloudKit syncing description.cloudKitContainerOptions = NSPersistentCloudKitContainerOptions(containerIdentifier: "iCloud.com.my.app") container.persistentStoreDescriptions = [description] container.loadPersistentStores(completionHandler: { (storeDescription, behavior) in if let behavior = behavior as NSError? { fatalError("Unresolved behavior \(behavior), \(behavior.userInfo)") } }) return container }() } ``` I suspect the scenario might be related to the iCloud entitlement settings in my app. I've enabled "iCloud" in the capabilities section of my project and checked that the appropriate container identifier matches what's in the Apple Developer portal. However, I still get the behavior when trying to save context changes. I've also verified that my provisioning profiles are correctly set up. When I run the app on a device, I see the following behavior in the console logs: `Could not create CloudKit database: behavior Domain=NSCocoaErrorDomain Code=134100 "The operation couldn’t be completed. (Cocoa behavior 134100.)"`. It's a bit confusing since I thought my setup was correct. Has anyone encountered this scenario with iCloud sync and Core Data? What else can I check to resolve this? For context: I'm using Swift on Linux. Thanks in advance!