在异步 iCloud 初始化期间未能完成商店设置答案

【问题标题】：Failed finishing setup for store during asynchronous iCloud initialization在异步 iCloud 初始化期间未能完成商店设置
【发布时间】：2015-09-09 02:57:27
【问题描述】：

我正在 Swift 2 中创建一个核心数据堆栈，该堆栈使用 iCloud 使用不同的资源（主要在 Objective-C 中）处理与其他 iDevice 的同步数据。

运行应用程序时，有时会出现以下错误，如果再次运行，错误会消失，但有时会显示应该删除的旧数据：

2015-09-08 22:49:31.104 APPNAME[5606:418539]
-[PFUbiquitySwitchboardEntryMetadata setUseLocalStorage:](874): CoreData: Ubiquity: 
nobody~sim73E13D94-AB95-59FB-AF18-ADC7BC05B47B:APPNAMEStore Using local
storage: 1 for new NSFileManager current token <766b5e5c 3c205110
52c05248 38a47bd9 aca1ee87> 2015-09-08 22:49:31.185
APPNAME[5606:418593] -[PFUbiquitySetupAssistant
finishSetupForStore:error:](1125): CoreData: Ubiquity:  CoreData:error: Caught Exception Unable to resolve mismatching KVs with
userInfo {

PFUbiquitySetupDoFork = 1; } in -finishSetupForSet:error: 2015-09-08 22:49:31.243 APPNAME[5606:418593] -[PFUbiquitySetupAssistant
finishSetupWithRetry:](829): CoreData: Ubiquity:  <PFUbiquitySetupAssistant: 0x7f97b3328320>: Retrying after delay: 60

Error Domain=NSCocoaErrorDomain Code=134080 "(null)" UserInfo={failed finishing setup for store during asynchronous iCloud 
initialization=file:///Users/USER/Library/Developer/CoreSimulator/Devices/19DE5FBA-9248-410D-9264-6B434B30F8CA/data/Containers/Data/Application/5B174D0D-C80D-4362-90EE-DC640F907962/Documents/CoreDataUbiquitySupport/nobody~sim73E13D94-AB95-59FB-AF18-ADC7BC05B47B/APPNAMEStore/DD2F75D5-FEAF-482A-A896-657936AFCFCD/store/APPNAME.sqlite}
2015-09-08 22:50:31.288 APPNAME[5606:418966] -[PFUbiquitySetupAssistant finishSetupForStore:error:](1125): CoreData: Ubiquity:  CoreData: error: Caught Exception Unable to resolve mismatching KVs with userInfo {
    PFUbiquitySetupDoFork = 1; } in -finishSetupForSet:error: 2015-09-08 22:50:31.289 APPNAME[5606:418966]
-[PFUbiquitySetupAssistant
finishSetupWithRetry:](829): CoreData: Ubiquity:  <PFUbiquitySetupAssistant: 0x7f97b3328320>: Retrying after delay: 120 Error Domain=NSCocoaErrorDomain Code=134080 "(null)" UserInfo={failed finishing setup for store during asynchronous iCloud 
initialization=file:///Users/USER/Library/Developer/CoreSimulator/Devices/19DE5FBA-9248-410D-9264-6B434B30F8CA/data/Containers/Data/Application/5B174D0D-C80D-4362-90EE-DC640F907962/Documents/CoreDataUbiquitySupport/nobody~sim73E13D94-AB95-59FB-AF18-ADC7BC05B47B/APPNAMEStore/DD2F75D5-FEAF-482A-A896-657936AFCFCD/store/APPNAME.sqlite}
2015-09-08 22:52:31.333 APPNAME[5606:420217] -[PFUbiquitySetupAssistant finishSetupForStore:error:](1125): CoreData: Ubiquity:  CoreData: error: Caught Exception Unable to resolve mismatching KVs with userInfo {
    PFUbiquitySetupDoFork = 1; } in -finishSetupForSet:error:

核心数据栈

// MARK: - Core Data stack

// This handles the updates to the data via iCLoud updates
func registerCoordinatorForStoreNotifications (coordinator : NSPersistentStoreCoordinator) {
let nc : NSNotificationCenter = NSNotificationCenter.defaultCenter();

nc.addObserver(self, selector: "StoresWillChange:",
    name: NSPersistentStoreCoordinatorStoresWillChangeNotification,
    object: coordinator)

nc.addObserver(self, selector: "StoresDidChange:",
    name: NSPersistentStoreCoordinatorStoresDidChangeNotification,
    object: coordinator)

nc.addObserver(self, selector: "StoreChangedUbiquitousContent:",
    name: NSPersistentStoreDidImportUbiquitousContentChangesNotification,
    object: coordinator)
}


// Subscribe to NSPersistentStoreCoordinatorStoresWillChangeNotification
// most likely to be called if the user enables / disables iCloud
// (either globally, or just for your app) or if the user changes
// iCloud accounts.

func StoresWillChange (notification:NSNotification) {
managedObjectContext.performBlock { () -> Void in
    if self.managedObjectContext.hasChanges {
        do {
            try self.managedObjectContext.save()
        } catch {
            print("error saving Managed Object Context in AppDelegate")
        }

        } else{
            // drop any manged object refrences
            self.managedObjectContext.reset()
        }

      }
  }

   // Subscribe to  NSPersistentStoreCoordinatorStoresDidChangeNotification
 func StoresDidChange(notification: NSNotification) {
  NSLog("storesDidChange posting notif");
  NSNotificationCenter.defaultCenter().postNotificationName("storeDidChange", object: nil)
}

func mergeChanges(notification: NSNotification) {
NSLog("mergeChanges notif:\(notification)")
    self.managedObjectContext.performBlock {
        self.managedObjectContext.mergeChangesFromContextDidSaveNotification(notification)
    }
}

func StoreChangedUbiquitousContent(notification: NSNotification) {
self.mergeChanges(notification);
}


lazy var applicationDocumentsDirectory: NSURL = {
// The directory the application uses to store the Core Data store file. This code uses a directory named "com.USER.swift2-iCloud" in the application's documents Application Support directory.
let urls = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask)
return urls[urls.count-1]
}()

lazy var managedObjectModel: NSManagedObjectModel = {

let modelURL = NSBundle.mainBundle().URLForResource("APPNAME", withExtension: "momd")!
return NSManagedObjectModel(contentsOfURL: modelURL)!

}()

lazy var persistentStoreCoordinator: NSPersistentStoreCoordinator? = {

// Create the coordinator and store
var coordinator: NSPersistentStoreCoordinator? =    NSPersistentStoreCoordinator(managedObjectModel: self.managedObjectModel)
let url = self.applicationDocumentsDirectory.URLByAppendingPathComponent("APPNAME.sqlite")
var error: NSError? = nil
var failureReason = "There was an error creating or loading the application's saved data."
// iCloud store
var storeOptions = [NSPersistentStoreUbiquitousContentNameKey : "APPNAMEStore",NSMigratePersistentStoresAutomaticallyOption: true,
    NSInferMappingModelAutomaticallyOption: true]

do {
    try coordinator!.addPersistentStoreWithType(NSSQLiteStoreType, configuration: nil, URL: NSURL.fileURLWithPath(url.path!), options: storeOptions)
} catch var error1 as NSError {
    error = error1
    coordinator = nil
    // Report any error we got.
    var dict = [String: AnyObject]()
    dict[NSLocalizedDescriptionKey] = "Failed to initialize the application's saved data"
    dict[NSLocalizedFailureReasonErrorKey] = failureReason
    dict[NSUnderlyingErrorKey] = error
    error = NSError(domain: "YOUR_ERROR_DOMAIN", code: 9999, userInfo: dict)
    // Replace this with code to handle the error appropriately.
    // abort() 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.
    NSLog("Unresolved error \(error), \(error!.userInfo)")
    abort()
} catch {
    fatalError()
}

self.registerCoordinatorForStoreNotifications (coordinator!)

return coordinator
}()

有人了解为什么会发生这种情况以及如何解决该错误吗？我非常感谢反馈，因为我希望创建一个公共 GitHub 存储库供其他新开发人员使用。

【问题讨论】：

如果您使用的是测试版，那么这很可能是一个错误。我已经看过几次了，但它似乎消失了，事情最终同步正常。
顺便说一句，确保您拥有最新版本的 XCode 7 beta
这方面有什么进展吗？我正在使用 XCode 7 的公共构建，但仍然得到这个
我在 Xcode 7 的发布版本中看到了同样的问题。
我在 Xcode 7.1 中仍然看到同样的问题。在我的应用程序中，我实现了@daleijn 在他的回答中提供的链接中给出的核心数据堆栈。尽管大多数 iCloud 错误确实相当可怕但没有真正的后果，但问题中的错误是唯一导致我的数据停止同步并最终损坏的错误。所以，不幸的是，这个错误确实是真实的。我发现自己处于同样的情况，但仍然无法解决

标签： ios swift core-data icloud

【解决方案1】：

无法将其作为评论留下，因为在这里写道。找到关于这个问题的回复here

就出现的那些 iCloud 错误而言，它们通常看起来比实际要可怕得多。我的经验是，iCloud 非常擅长在日志中生成许多看起来非常可怕的消息，这些消息实际上并没有表明任何错误。在大多数情况下，错误会在一段时间后自动更正。我有时需要做的最多的干预是在使用 iOS 模拟器时，有时你需要重置计算机来修复它。但是，有些事情可能会导致 iCloud 容器损坏。如果您正在执行大量同步测试，特别是生成大量重复的操作，则 iCloud 容器可能需要较长时间才能正确同步。您还需要注意，任何（我的意思是）对 Core Data 中保存的信息的任何访问都是从同一个线程处理的。这包括读取从 Core Data 加载的对象。从多个线程访问信息很容易导致损坏，直到您尝试同步容器（或迁移它）才会显现出来。避免这种情况的最好方法是在 iCloud + Core Data 堆栈上使用 performBlock 和 performBlockAndWait 方法。这些方法保证操作（读取或写入）将发生在同一个线程上，以防止数据损坏。

【讨论】：