In my app I use CloudKit to sync Core Data data ("Use Core Data" and "Use CloudKit" checkboxes were checked when creating a project).
In AppDelegate.swift I did not change code below Core Data stack mark. In code I don't specified zone anywhere.
During development I tested app on my devices using same iCloud account. Sync worked well. After testing I deployed my Development schema to Production schema. Later, I published an app on App Store.
Now in CloudKit Dashboard, in Production > Telemetry module I see ZONE_NOT_FOUND errors with a count that equals to approximately number of my users.
I tested my app (now downloaded directly from App Store) on my friend devices — sync working, but one note: her devices were used during development, too (I connected them to my Mac and build and install app from Xcode a number of times).
Another note: when I go to Data module in Production section in CloudKit Dashboard, in Zone menu I see 2 options:
com.apple.coredata.cloudkit.zone_defaultZone
And when I press "Query Records", I see my data rows only when com.apple.coredata.cloudkit.zone selected.
AppDelegate.swift:
import UIKit
import CoreData
import StoreKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Register for Remote Notifications
application.registerForRemoteNotifications()
// Override point for customization after application launch.
return true
}
// MARK: UISceneSession Lifecycle
func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
// Called when a new scene session is being created.
// Use this method to select a configuration to create the new scene with.
return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
}
func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) {
// Called when the user discards a scene session.
// If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions.
// Use this method to release any resources that were specific to the discarded scenes, as they will not return.
}
// MARK: - Core Data stack
lazy var persistentContainer: NSPersistentCloudKitContainer = {
/*
The persistent container for the application. This implementation
creates and returns a container, having loaded the store for the
application to it. This property is optional since there are legitimate
error conditions that could cause the creation of the store to fail.
*/
let container = NSPersistentCloudKitContainer(name: "AppTitle")
guard let description = container.persistentStoreDescriptions.first else {
fatalError("No Descriptions found")
}
description.setOption(true as NSObject, forKey: NSPersistentStoreRemoteChangeNotificationPostOptionKey)
container.loadPersistentStores(completionHandler: { (storeDescription, error) in
if let error = error as NSError? {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
/*
Typical reasons for an error here include:
* The parent directory does not exist, cannot be created, or disallows writing.
* The persistent store is not accessible, due to permissions or data protection when the device is locked.
* The device is out of space.
* The store could not be migrated to the current model version.
Check the error message to determine what the actual problem was.
*/
fatalError("Unresolved error \(error), \(error.userInfo)")
}
})
container.viewContext.automaticallyMergesChangesFromParent = true
container.viewContext.mergePolicy = NSMergeByPropertyObjectTrumpMergePolicy
NotificationCenter.default.addObserver(self, selector: #selector(self.processUpdate), name: .NSPersistentStoreRemoteChange, object: nil)
return container
}()
// MARK: - Core Data Saving support
func saveContext () {
let context = persistentContainer.viewContext
if context.hasChanges {
do {
try context.save()
} catch {
// Replace this implementation with code to handle the error appropriately.
// fatalError() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be useful during development.
let nserror = error as NSError
fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
}
}
}
@objc
func processUpdate(notification: NSNotification) {
operationQueue.addOperation {
// process notification
let context = self.persistentContainer.newBackgroundContext()
if context.hasChanges {
do {
try context.save()
} catch {
let nserror = error as NSError
fatalError("Unresolved error \(nserror), \(nserror.userInfo)")
}
}
}
}
lazy var operationQueue: OperationQueue = {
var queue = OperationQueue()
queue.maxConcurrentOperationCount = 1
return queue
}()
}
This error worries me, what can I do when app already in production to fix it, make it go away?
