Question

我正在使用Swift 2创建核心数据堆栈，该堆栈使用不同的资源（主要使用Objective-C）使用iCloud处理与其他iDevices的数据同步。

运行应用程序时，我有时会收到以下错误，如果我再次运行该错误，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:

核心数据堆

// 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
}()

有人理解为什么会这样，以及我如何解决错误？我非常感谢您的反馈，因为我希望为其他新开发人员创建一个公共GitHub存储库。

Answer 1

无法将其留作评论，cuz在此写道。找到关于此问题的回复here

就出现的那些iCloud错误而言，它们通常看起来比它们更加可怕。我的经验是，iCloud非常善于在日志中生成大量非常可怕的消息，这些消息实际上并不表示任何错误。在大多数情况下，错误会在一段时间后自动纠正。我有时需要做的最多干预是使用iOS模拟器，有时你需要重置计算机来修复它。但是，有些事情可能导致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项的操作，则iCloud容器可能需要较长时间才能正确同步。您还需要小心任何，我的意思是，访问Core Data中保存的信息是从同一个线程处理的。这包括从您从Core Data加载的对象中读取。从多个线程访问信息很容易导致在您尝试同步容器（或迁移容器）之前不会显示的损坏。避免这种情况的最佳方法是在iCloud + Core Data堆栈上使用performBlock和performBlockAndWait方法。这些方法保证操作（读或写）将在同一个线程上发生，以防止数据损坏。

异步iCloud初始化期间存储的完成设置失败

1 个答案: