【发布时间】：2015-07-23 13:25:34
【问题描述】：
iPhone/iOS 应用使用 CoreData + SQLite (NSSQLiteStoreType) + iCloud iOS。当应用程序在第一次安装时启动（或通过 xcode 删除并重新安装后），并且 iCloud 中有先前安装或同一帐户中其他设备的先前应用程序数据，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他们的数据在应用程序升级时丢失了。但是，在 60 秒延迟后，数据会恢复。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：错误：初始同步通知返回错误（错误域=BRCloudDocsErrorDomain Code=12“操作无法完成。（BRCloudDocsErrorDomain 错误 12.）”）
[4972:2014294] -PFUbiquitySetupAssistant finishSetupWithRetry:: CoreData: Ubiquity: : Retrying after delay: 60 Error Domain=BRCloudDocsErrorDomain Code=12 “操作无法完成。（BRCloudDocsErrorDomain 错误 12。）”
这是一个代码 sn-p 和更详细的日志以提供更多上下文。
来自应用委托：
- (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
【问题讨论】：
-
看起来它正在按预期工作，如下所示： - 设备打开 iCloud 存储 - Core Data 创建一个临时本地存储并使其可用于应用程序（使用本地存储：1 条消息） - Core Data 然后创建一个 iCloud 存储（本地副本）并下载任何基本存储数据和日志文件并导入它们 - 然后 Core Data 将临时存储与本地 iCloud 存储合并并切换应用程序以使用它（使用本地存储：0消息）并且 Core Data 错误可能与等待 iCloud 基础存储和日志下载有关。通常只提供信息。
-
具有 iCloud/NSSQLiteStoreType 的应用程序运行完美，除了描述的 60 秒超时。我认为 iCloud 不需要出错然后在 60 秒内重试，“延迟后重试：60”我有应用用户通过电子邮件评论他们丢失了应用数据，我怀疑这仅仅是由于超时和他们不等待它。我希望有人可能已经看到了这些错误。感谢您的评论。
-
Apple 不提供任何服务水平协议，说明 iCloud 同步将在任何定义的时间范围内发生。在我的测试中，等待期可能比 60 秒长得多。执行元数据查询以查找尚未下载的 iCloud 文件。您的用户显然需要访问 iCloud 才能执行此操作。如果是这样，您可以监控下载状态，一旦下载，通常会很快。查看此站点以获取一些示例应用程序。 ossh.com.au/design-and-technology/softwre-development/sample-library-style-ios-core-data-app-with-icloud-integration/
-
嗨@BillBunting - 你有没有想过解决这个问题？在过去的两个月中，我也遇到了完全相同的错误和问题。当我制作了我的应用程序的新版本并将其发布到 App Store（没有 iCloud/Core Data 更改）时，当我升级到那个版本时，我的数据都从应用程序中消失了。我没有等待数据进来，我只是惊慌失措并从商店中拉出应用程序，但我不知道修复是什么。关键是，当应用程序第一次使用商店中的现有数据启动时，我在 Xcode 中遇到了完全相同的错误，等等。
-
@BillBunting 所以我将我的应用程序保存在不同的国家/地区的商店中，以便继续测试它。我刚刚再次测试它，即使在等待之后，数据也不会出现.我启用了 iCloud Drive。如果您仍然遇到此问题，或者如果问题得到解决，我很乐意与您合作解决问题
标签： ios objective-c iphone core-data icloud