iOS Swift 3核心数据-致命错误尝试递归调用-保存：在上下文中中止

我需要一些帮助来调试我在对核心数据进行大约150次调用以保存上下文时遇到的错误。在确定是否需要更新核心数据记录，因为它不存在，或者CloudKit记录更为新之后，我为每个异步调用保存核心数据上下文，但每次调用只调用一次save。我能得到一些帮助来理解递归在哪里发生吗

2017-06-17 12:13:51.295312-0400 My Toy Chest[2161:2177589] fatal error: Unresolved error Error Domain=NSCocoaErrorDomain Code=132001 "(null)" UserInfo={message=attempt to recursively call -save: on the context aborted, stack trace=(
0   CoreData                            0x0000000188e8802c <redacted> + 164
1   My Toy Chest                        0x0000000100109e0c _TFC12My_Toy_Chest11AppDelegate11saveContextfT_T_ + 172
2   My Toy Chest                        0x00000001000de61c _TFFFC12My_Toy_Chest21ActionFigureSpecifics24setActionFigureSpecificsFT_T_U_FTGSqCSo8CKRecord_GSqPs5Error___T_U0_FT_T_ + 8464
3   My Toy Chest                        0x00000001000946d4 _TTRXFo___XFdCb___ + 44
4   libdispatch.dylib                   0x0000000101549a50 _dispatch_call_block_and_release + 24
5   libdispatch.dylib                   0x0000000101549a10 _dispatch_client_callout + 16
6   libdispatch.dylib                   0x000000010154eb78 _dispatch_main_queue_callback_4CF + 1204
7   CoreFoundation                      0x0000000186b3d0c8 <redacted> + 12
8   CoreFoundation                      0x0000000186b3ace4 <redacted> + 1572
9   CoreFoundation                      0x0000000186a6ada4 CFRunLoopRunSpecific + 424
10  GraphicsServices                    0x00000001884d4074 GSEventRunModal + 100
11  UIKit                               0x000000018cd25058 UIApplicationMain + 208
12  My Toy Chest                        0x000000010010a668 main + 76
13  libdyld.dylib                       0x0000000185a7959c <redacted> + 4
)}, [AnyHashable("stack trace"): <_NSCallStackArray 0x17464c1b0>(
0   CoreData                            0x0000000188e8802c <redacted> + 164,
1   My Toy Chest                        0x0000000100109e0c _TFC12My_Toy_Chest11AppDelegate11saveContextfT_T_ + 172,
2   My Toy Chest                        0x00000001000de61c _TFFFC12My_Toy_Chest21ActionFigureSpecifics24setActionFigureSpecificsFT_T_U_FTGSqCSo8CKRecord_GSqPs5Error___T_U0_FT_T_ + 8464,
3   My Toy Chest                        0x00000001000946d4 _TTRXFo___XFdCb___ + 44,
4   libdispatch.dylib                   0x0000000101549a50 _dispatch_call_block_and_release + 24,
5   libdispatch.dylib                   0x0000000101549a10 _dispatch_client_callout + 16,
6   libdispatch.dylib                   0x000000010154eb78 _dispatch_main_queue_callback_4CF + 1204,
7   CoreFoundation                      0x0000000186b3d0c8 <redacted> + 12,
8   CoreFoundation                      0x0000000186b3ace4 <redacted> + 1572,
9   CoreFoundation                      0x0000000186a6ada4 CFRunLoopRunSpecific + 424,
10  GraphicsServices                    0x00000001884d4074 GSEventRunModal + 100,
11  UIKit                               0x000000018cd25058 UIApplicationMain + 208,
12  My Toy Chest                        0x000000010010a668 main + 76,
13  libdyld.dylib                       0x0000000185a7959c <redacted> + 4
)
, AnyHashable("message"): attempt to recursively call -save: on the context aborted]: file /Users/jasongloor/Documents/Development/My Toy Chest/My Toy Chest/AppDelegate.swift, line 211

2017-06-17 12:13:51.295312-0400我的玩具箱[2161:2177589]致命错误：未解决的错误域=NSCocoaErrorDomain code=132001“（null）”UserInfo={message=尝试递归调用-保存：在上下文中中止，堆栈跟踪=(
0核心数据0x0000000188e8802c+164
1我的玩具箱0x0000000100109e0c\u TFC12My\u玩具箱11AppDelegate11SaveContextFT\u T\u172
2我的玩具箱0x00000001000de61c\U TFFFC12My\U玩具箱21动作图形规格24设置动作图形规格SFT\U T\U FTGSqCSo8CKRecord\U gsqps5错误\U\U T\U T\U+8464
我的玩具箱0x00000001000946d4
4 libdispatch.dylib 0x0000000101549a50 \u调度\u调用\u块\u和\u释放+24
5 libdispatch.dylib 0x0000000101549a10 _dispatch_client_callout+16
6 libdispatch.dylib 0x000000010154eb78_dispatch_main_queue_callback_4CF+1204
7 CoreFoundation 0x0000000186b3d0c8+12
8核心基金会0x0000000186b3ace4+1572
9 CoreFoundation 0x0000000186a6ada4 CFRunLoopRunSpecific+424
10个图形服务0x00000001884d4074 GSEventRunModal+100
11 UIKit 0x000000018cd25058 UIApplicationMain+208
12我的玩具箱0x000000010A668主+76
13 libdyld.dylib 0x0000000185a7959c+4
)}，[AnyHashable（“堆栈跟踪”）：(
0 CoreData 0x0000000188e8802c+164，
1我的玩具箱0x0000000100109e0c\u TFC12My\u玩具箱11AppDelegate11SaveContextft\u T\u172，
2我的玩具箱0x00000001000de61c\U TFFFC12My\U玩具箱21动作图形规格24设置动作图形规格SFT\U T\U FTGSqCSo8CKRecord\U gsqps5错误\U\U T\U T\U+8464，
我的玩具箱0x00000001000946d4，
4 libdispatch.dylib 0x0000000101549a50 \u调度\u调用\u块\u和\u释放+24，
5 libdispatch.dylib 0x0000000101549a10 _dispatch_client_callout+16，
6 libdispatch.dylib 0x000000010154eb78_dispatch_main_queue_callback_4CF+1204，
7 CoreFoundation 0x0000000186b3d0c8+12，
8核心基金会0x0000000186b3ace4+1572，
9 CoreFoundation 0x0000000186a6ada4 CFRunLoopRunSpecific+424，
10个图形服务0x00000001884d4074 GSEventRunModal+100，
11 UIKit 0x000000018cd25058 UIApplicationMain+208，
12我的玩具箱0x000000010A668主+76，
13 libdyld.dylib 0x0000000185a7959c+4
)
，AnyHashable（“message”）：尝试递归调用-save:在上下文中中止]：file/Users/jasongloor/Documents/Development/My Toy cost/My Toy cost/AppDelegate.swift，第211行

导致坠机的代码。下面的代码对于数组中的每个动作图形调用一次

func setActionFigureSpecifics() {
    // check for specifics already set to prevent multiple calls
    if isActionFigureSpecificSetFromICloud {

        self.delegate?.updateActionFigureSpecificsModel()
    }
    else {
        //////////
        // Core Date Fetch Request
        //////////
        let isNewCoreDataRecord = setCoreDataActionFigureSpecifics()

        //////////
        // iCloud fetch request
        //////////
        if SharedData.sharedInstance.isUserPreferenceToUseICloud == true {
            isActionFigureSpecificSetFromICloud = true

            // Private Database
            let privateDatabase = SharedData.sharedInstance.privateDatabase

            let actionFigureSpecificsRecordId = CKRecordID(recordName: actionFigureSpecificsGlobalUniqueId)

            privateDatabase!.fetch(withRecordID: actionFigureSpecificsRecordId){ [unowned self] record, error in
                var ckError: CKError?

                if let cloudKitError = error as? CKError {
                    ckError = cloudKitError
                }

                if (ckError != nil && (ckError?.code != CKError.Code.unknownItem)) {
                }
                else {

                        if record != nil { // check for records found

                            self.actionFigureSpecificsRecord = record
                            let iCloudUpdateDate = self.actionFigureSpecificsRecord!.object(forKey: kUpdateDate) as! Date

                            // set the core data record from the cloud if the record is new
                            if isNewCoreDataRecord == true {
                                self.actionFigureSpecificsCoreData!.haveTheFigure = self.actionFigureSpecificsRecord!.object(forKey: kHaveTheFigure) as! Bool
                                self.actionFigureSpecificsCoreData!.haveFigureCount = self.actionFigureSpecificsRecord!.object(forKey: kHaveFigureCount) as! Int64
                                self.actionFigureSpecificsCoreData!.wantTheFigure = self.actionFigureSpecificsRecord!.object(forKey: kWantTheFigure) as! Bool
                                self.actionFigureSpecificsCoreData!.wantFigureCount = self.actionFigureSpecificsRecord!.object(forKey: kWantFigureCount) as! Int64
                                self.actionFigureSpecificsCoreData!.updateDate = iCloudUpdateDate as NSDate

                                SharedData.sharedInstance.appDelegate.saveContext()
                            }

                            let coreDataUpdateDate = self.actionFigureSpecificsCoreData!.updateDate! as Date

                            // determine which data is more current by date

                            if coreDataUpdateDate < iCloudUpdateDate { // reset core data
                                self.actionFigureSpecificsCoreData!.haveTheFigure = self.actionFigureSpecificsRecord!.object(forKey: kHaveTheFigure) as! Bool
                                self.actionFigureSpecificsCoreData!.haveFigureCount = self.actionFigureSpecificsRecord!.object(forKey: kHaveFigureCount) as! Int64
                                self.actionFigureSpecificsCoreData!.wantTheFigure = self.actionFigureSpecificsRecord!.object(forKey: kWantTheFigure) as! Bool
                                self.actionFigureSpecificsCoreData!.wantFigureCount = self.actionFigureSpecificsRecord!.object(forKey: kWantFigureCount) as! Int64
                                self.actionFigureSpecificsCoreData!.updateDate = iCloudUpdateDate as NSDate

                                //  Recursion Error occurs here
                                //  Recursion Error occurs here
                                SharedData.sharedInstance.appDelegate.saveContext()
                            }
                            else if coreDataUpdateDate > iCloudUpdateDate { // reset iCloud data
                                self.actionFigureSpecificsRecord!.setObject(self.actionFigureSpecificsCoreData!.haveTheFigure as CKRecordValue?, forKey: kHaveTheFigure)
                                self.actionFigureSpecificsRecord!.setObject(self.actionFigureSpecificsCoreData!.haveFigureCount as CKRecordValue?, forKey: kHaveFigureCount)
                                self.actionFigureSpecificsRecord!.setObject(self.actionFigureSpecificsCoreData!.wantTheFigure as CKRecordValue?, forKey: kWantTheFigure)
                                self.actionFigureSpecificsRecord!.setObject(self.actionFigureSpecificsCoreData!.wantFigureCount as CKRecordValue?, forKey: kWantFigureCount)
                                self.actionFigureSpecificsRecord!.setObject(self.actionFigureSpecificsCoreData!.updateDate as CKRecordValue?, forKey: kUpdateDate)

                                #if DEBUG
                                    print("Specifics reset iCloud data: \(String(describing: self.actionFigureSpecificsCoreData!.actionFigureRecordName)) coreData \(coreDataUpdateDate) and iCloud \(iCloudUpdateDate)")
                                #endif

                                self.saveActionFigureSpecifics(forUpdateDate: self.actionFigureSpecificsCoreData!.updateDate!)
                            }


                            self.delegate?.updateActionFigureSpecificsModel()
                        }
                        else {
                             if self.isActionFigureSpecificsCoreDataDefaultValues() == false {

                                self.saveActionFigureSpecifics(forUpdateDate: self.actionFigureSpecificsCoreData!.updateDate!)
                            }

                            self.delegate?.updateActionFigureSpecificsModel()
                        }
                    }
            }
        }
    }
}


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)")
        }
    }
}

func setActionFigureSpecifics（）{
//检查已设置的防止多次呼叫的详细信息
如果isActionFigureSpecificSetFromICloud{
self.delegate？.updateActionFigureSpecificsModel（）
}
否则{
//////////
//核心日期提取请求
//////////
让isNewCoreDataRecord=setCoreDataActionFigureSpecifics（）
//////////
//iCloud获取请求
//////////
如果SharedData.sharedInstance.IsUserPreferenceToSeCloud==true{
IsActionFigureSpecificationSetFromicCloud=true
//专用数据库
让privateDatabase=SharedData.sharedInstance.privateDatabase
让actionFigureSpecificsRecordId=CKRecordID（记录名称：actionFigureSpecificsGlobalUniqueId）
privateDatabase！.fetch（withRecordID:ActionFigurespecificsRecorded）{[unowned self]记录，错误在
卡尔：卡尔？
如果让cloudKitError=错误为？CKError{
ckError=cloudKitError
}
if（ckError！=nil&（ckError？.code！=ckError.code.unknownItem））{
}
否则{
if record！=nil{//检查找到的记录
self.actionFigureSpecificsRecord=记录
让iCloudUpdateDate=self.actionFigureSpecificsRecord！。对象（forKey:kUpdateDate）作为！日期
//如果记录是新的，则从云中设置核心数据记录
如果isNewCoreDataRecord==true{
self.actionFigureSpecificsCoreData！.haveTheFigure=self.actionfigurespecicsrecord！。对象（forKey:kHaveTheFigure）为！Bool
self.actionFigureSpecificsCoreData！.haveFigureCount=self.actionFigureSpecificsRecord！。对象（forKey:kavefigureCount）为！Int64
self.actionFigureSpecificsCoreData！.wantTheFigure=self.actionfigurespecicsrecord！。对象（forKey:kWantTheFigure）为！Bool
self.actionFigureSpecificsCoreData！.wantFigureCount=self.actionFigureSpecificsRecord！。对象（forKey:kWantFigureCount）为！Int64
self.actionFigureSpecificsCoreData！.updateDate=iCloudUpdateDate作为NSDate
SharedData.sharedIns
func setCoreDataActionFigureSpecifics() -> Bool {
    var isNewCoreDataRecord = false

    let fetchRequest = NSFetchRequest<NSFetchRequestResult>(entityName: "ActionFigureSpecificsCoreData")

    // Add Predicate
    let predicate = NSPredicate(format: "%K = %@", "actionFigureRecordName", actionFigureGlobalUniqueId)
    fetchRequest.predicate = NSCompoundPredicate(andPredicateWithSubpredicates: [predicate])

    do {
        let recordArray = try SharedData.sharedInstance.managedObjectContext.fetch(fetchRequest) as! [ActionFigureSpecificsCoreData]

        // check for records
        if recordArray.count == 0 {
            isNewCoreDataRecord = true

            actionFigureSpecificsCoreData = ActionFigureSpecificsCoreData(context: SharedData.sharedInstance.managedObjectContext)
            actionFigureSpecificsCoreData!.actionFigureRecordName = actionFigureGlobalUniqueId
            // want it and have it are set to defaults by core data
            actionFigureSpecificsCoreData!.updateDate = NSDate()

            SharedData.sharedInstance.appDelegate.saveContext()
        }
        else if recordArray.count == 1 {
            for record in recordArray {
                actionFigureSpecificsCoreData = record

                ...

                delegate?.updateActionFigureSpecificsModel()
            }
        }
        else {
            print("Multiple action figure specific records fetched for \(actionFigureGlobalUniqueId)")
            abort()
        }
    } catch {
        let saveError = error as NSError
        print("\(saveError), \(saveError.userInfo)")
    }

    return isNewCoreDataRecord

}