iPhone/iOS 应用程序使用 CoreData + SQLite (NSSQLiteStoreType) + iCloud iOS。当应用程序在首次安装时启动(或通过 xcode 删除并重新安装后)，并且 iCloud 中存在先前安装或同一帐户中其他设备的先前应用程序数据时，会发生以下错误，然后重试延迟 60 秒，然后成功迁移到 iCloud。结果是应用程序的用户认为应用程序升级时他们的数据丢失了。但是，在 60 秒延迟之后，数据将恢复。错误和一些代码如下。

是什么导致了这个错误？我在哪里可以了解有关此错误的更多信息？

[4972:2014294] CoreData: iCloud: Error: initial sync notification returned an error (Error Domain=BRCloudDocsErrorDomain Code=12 "The operation couldn't be completed. (BRCloudDocsErrorDomain error 12.)")

[4972:2014294] -PFUbiquitySetupAssistant finishSetupWithRetry:: CoreData: Ubiquity: : Retrying after delay: 60 Error Domain=BRCloudDocsErrorDomain Code=12 "The operation couldn't be completed. (BRCloudDocsErrorDomain error 12.)"

这是一个代码片段和更详细的日志，以提供更多上下文。

来自应用委托(delegate):

        - (void)applicationDidFinishLaunching:(UIApplication *)application { 

            ... standard iCloud and app setup ...

            NSManagedObjectContext *context = [self managedObjectContext];

            ...

            ... query the db ...
        }

        /**
         Returns the managed object context for the application.
         If the context doesn't already exist, it is created and bound to the persistent store coordinator for the application.
         */
        - (NSManagedObjectContext *) managedObjectContext {

            if (managedObjectContext != nil) {
                return managedObjectContext;
            }

            NSPersistentStoreCoordinator *coordinator = [self persistentStoreCoordinator];
            if (coordinator != nil) {
                managedObjectContext = [[NSManagedObjectContext alloc] init];
                [managedObjectContext setPersistentStoreCoordinator: coordinator];
            }
            managedObjectContext.mergePolicy = NSMergeByPropertyStoreTrumpMergePolicy;  
            return managedObjectContext;
        }

        ...

        /**
         Returns the managed object model for the application.
         If the model doesn't already exist, it is created by merging all of the models found in the application bundle.
         */
        - (NSManagedObjectModel *)managedObjectModel {

            if (managedObjectModel != nil) {
                return managedObjectModel;
            }
            managedObjectModel = [[NSManagedObjectModel mergedModelFromBundles:nil] retain];    
            return managedObjectModel;
        }

        ...

        /**
         Returns the persistent store coordinator for the application.
         If the coordinator doesn't already exist, it is created and the application's store added to it.
         */
        - (NSPersistentStoreCoordinator *)persistentStoreCoordinator {

            if (persistentStoreCoordinator != nil) {
                return persistentStoreCoordinator;
            }




            NSURL *storeUrl = [NSURL fileURLWithPath: [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask,YES) lastObject] stringByAppendingPathComponent: @"myapp.sqlite"]];

            NSLog(@"App Store URL : %@", storeUrl);

            NSError *error = nil;
            persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel: [self managedObjectModel]];


            NSDictionary *storeOptions;
            storeOptions = @{
                             NSMigratePersistentStoresAutomaticallyOption : @YES,
                             NSInferMappingModelAutomaticallyOption : @YES,
                             NSPersistentStoreUbiquitousContentNameKey: @"AppCloudStore"
                             };
            #ifdef FREE
            storeOptions = @{
                             NSMigratePersistentStoresAutomaticallyOption : @YES,
                             NSInferMappingModelAutomaticallyOption : @YES,
                             NSPersistentStoreUbiquitousContentNameKey: @"FreeAppCloudStore"
                             };
            #endif

            // Register for Notifications
            NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];

            [notificationCenter addObserver:self
                                   selector:@selector(storesDidChange:)
                                       name:NSPersistentStoreCoordinatorStoresDidChangeNotification
                                     object:self.persistentStoreCoordinator];

            [notificationCenter addObserver:self
                                   selector:@selector(persistentStoreDidImportUbiquitousContentChanges:)
                                       name:NSPersistentStoreDidImportUbiquitousContentChangesNotification
                                     object:self.persistentStoreCoordinator];

            [notificationCenter addObserverForName:NSPersistentStoreCoordinatorStoresWillChangeNotification
             object:self.persistentStoreCoordinator
             queue:[NSOperationQueue mainQueue]
             usingBlock:^(NSNotification *note) {
                 NSLog(@"Stores Will Change...");

                     if ([self.managedObjectContext hasChanges]) {
                         NSError *saveError;
                         if (![self.managedObjectContext save:&saveError]) {
                             NSLog(@"Save error: %@", saveError);
                         }
                     } else {
                         // drop any managed object references
                         [self.managedObjectContext reset];
                     }

             }];


            NSPersistentStore *store = [persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl  options:storeOptions error:&error];

            if (store == nil || error != nil) {
                NSLog(@"Error: %@, %@", error, [error userInfo]);
                abort();
            }


            NSURL *finaliCloudURL = [store URL];
            NSLog(@"Created persistent store okay.  Final iCloud URL is: %@", finaliCloudURL);

            return persistentStoreCoordinator;
        }

    ...

    - (void)persistentStoreDidImportUbiquitousContentChanges:(NSNotification *)notification {

        NSLog(@"persistentStoreDidImportUbiquitousContentChanges: Called.  Content has changed via Core Data iCloud: *******************************************");

            // Received and merge updates from iCloud
            [self.managedObjectContext mergeChangesFromContextDidSaveNotification:notification];
            [self notifyAndRefreshAllDataDueToCloudEvent];
    }

    ...

    - (void)storesDidChange:(NSNotification *)notification {

        // Tell me: why did my stores changes?
        NSNumber *transitionType = [notification.userInfo objectForKey:NSPersistentStoreUbiquitousTransitionTypeKey];
        int theCause = [transitionType intValue];

        NSLog(@"storesDidChange: NSPersistentStoreCoordinatorStoresDidChange Notification = %@", notification);

        switch (theCause) {
            case NSPersistentStoreUbiquitousTransitionTypeAccountAdded: {
                NSLog(@"storesDidChange: Account Added");
                // account was added
            }
                break;
            case NSPersistentStoreUbiquitousTransitionTypeAccountRemoved: {
                NSLog(@"storesDidChange: Account Removed");
                // account was removed
            }
                break;
            case NSPersistentStoreUbiquitousTransitionTypeContentRemoved: {
                NSLog(@"storesDidChange: Content Removed");
                // content was removed
            }
                break;
            case NSPersistentStoreUbiquitousTransitionTypeInitialImportCompleted: {
                NSLog(@"storesDidChange: Initial Import:");
                // initial import
            }
                break;

            default:
                break;

        }

    ... 

        [[NSNotificationCenter defaultCenter]
         postNotificationName:@"*****DidChangeByPersistentStoreChangesNotification"
         object:self];

        [[NSNotificationCenter defaultCenter]
         postNotificationName:@"*****DidChangeByPersistentStoreChangesNotification"
         object:self];

        [[NSNotificationCenter defaultCenter]
         postNotificationName:@"*****DidChangeByPersistentStoreChangesNotification"
         object:self];

    }

更详细的日志:

2015-05-12 10:22:23.367 [4972:2014228] storesDidChange: NSPersistentStoreCoordinatorStoresDidChange Notification = NSConcreteNotification 0x17005f470 {name = NSPersistentStoreCoordinatorStoresDidChangeNotification; object = <NSPersistentStoreCoordinator: 0x170072100>; userInfo = {
    added =     (
        "<NSSQLCore: 0x12dd100b0> (URL: file:///var/mobile/Containers/Data/Application/****/Documents/CoreDataUbiquitySupport/mobile~****-7B78C4F2FDB2/FreeAppCloudStore/2***/store/app.sqlite)"
    );
}}
2015-05-12 10:22:23.409 [4972:2014228] -[PFUbiquitySwitchboardEntryMetadata setUseLocalStorage:](808): CoreData: Ubiquity:  mobile~****:FreeAppCloudStore
Using local storage: 1
2015-05-12 10:22:23.410 [4972:2014228] Created persistent store okay.  Final iCloud URL is: file:///var/mobile/Containers/Data/Application/****/store/app.sqlite
2015-05-12 10:22:23.477 [4972:2014228] AppTableViewController:viewWillAppear: enter
2015-05-12 10:22:23.478 [4972:2014228] getSharedAdBannerView: enter
2015-05-12 10:22:23.518 [4972:2014228] queryDidUpdate: MSMetadataQuery Notification: - NSMetadataQueryDidFinishGatheringNotification
2015-05-12 10:22:23.519 [4972:2014228] queryDidUpdate: NSMetadataQuery returned 25 results
2015-05-12 10:22:23.524 [4972:2014228] setProcessTimer: 15.000000
2015-05-12 10:22:23.531 [4972:2014228] TableViewController:viewDidAppear: enter
2015-05-12 10:22:23.531 [4972:2014228] TableViewController:loadData (or reload): enter
2015-05-12 10:22:23.582 [4972:2014294] CoreData: iCloud: Error: initial sync notification returned an error (Error Domain=BRCloudDocsErrorDomain Code=12 "The operation couldn't be completed. (BRCloudDocsErrorDomain error 12.)")
2015-05-12 10:22:23.594 [4972:2014294] -[PFUbiquitySetupAssistant finishSetupWithRetry:](826): CoreData: Ubiquity:  <PFUbiquitySetupAssistant: 0x12de18940>: Retrying after delay: 60
Error Domain=BRCloudDocsErrorDomain Code=12 "The operation couldn't be completed. (BRCloudDocsErrorDomain error 12.)"
2015-05-12 10:22:23.854 [4972:2014228] didFailToReceiveAdWithError
2015-05-12 10:22:55.150 [4972:2014228] bannerViewDidLoadAd
2015-05-12 10:23:24.178 [4972:2014228] queryDidUpdate: MSMetadataQuery Notification: - NSMetadataQueryDidUpdateNotification
2015-05-12 10:23:24.178 [4972:2014228] queryDidUpdate: NSMetadataQuery returned 25 results
2015-05-12 10:23:25.039 [4972:2014228] Stores Will Change...
2015-05-12 10:23:25.101 [4972:2014228] storesDidChange: NSPersistentStoreCoordinatorStoresDidChange Notification = NSConcreteNotification 0x170254940 {name = NSPersistentStoreCoordinatorStoresDidChangeNotification; object = <NSPersistentStoreCoordinator: 0x170072100>; userInfo = {
    NSPersistentStoreUbiquitousTransitionTypeKey = 4;
    added =     (
        "<NSSQLCore: 0x12dd100b0> (URL: file:///var/mobile/Containers/Data/Application/****/FreeAppCloudStore/20EF5D1C-4748-4AB2-BCE1-91B228437D77/store/app.sqlite)"
    );
    removed =     (
        "<NSSQLCore: 0x12dd100b0> (URL: file:///var/mobile/Containers/Data/Application/*****/store/app.sqlite)"
    );
}}
2015-05-12 10:23:25.101 [4972:2014646] -[PFUbiquitySwitchboardEntryMetadata setUseLocalStorage:](808): CoreData: Ubiquity:  mobile~*****FreeAppCloudStore
Using local storage: 0

最佳答案

我希望我的回答能为遇到这个错误的人节省很多时间。

当删除和安装应用程序之间的时间小于特定间隔时，会发生此错误。不知道和我是不是一样，我的是15秒。

愚蠢的错误，浪费了几个小时。

关于ios - 是什么导致 iOS iCloud 错误 : Error Domain=BRCloudDocsErrorDomain Code=12 "The operation couldn’ t be completed.“延迟后重试:60，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/30194809/