我知道有很多相同类型的问题，但我面临着不同的问题。我在将数据保存到核心数据时遇到此错误。首先让我告诉你我的情景。我正在调用API并将其存储到数据库中。当我调用相同的API（用于下一个数据集）并且每当我收到此错误并且应用程序崩溃时我再次尝试将其推送到数据库时，没有问题，但延迟加载。即使我尝试过一些静态数据，但在第二种情况下它会崩溃。
ActivityViewController
func loadActivity() {
CISyncManager.sharedManager().pullActivity(complition: { (activities) -> () in
CILocalStorageManager.sharedManager().storeActivity(activities, complition: { (success, error) -> () in
// other stuffs
})
})
}
func loadMoreActivity(lastId: String) {
CISyncManager.sharedManager().pullActivity(lastId: lastId complition: { (activities) -> () in
CILocalStorageManager.sharedManager().storeActivity(activities, complition: { (success, error) -> () in
// other stuffs
})
})
}
CILocalStorageManager
func storeActivity(activities: [AnyObject], complition:((success: Bool, error: NSError?) -> ())?) {
let queue = dispatch_queue_create("com.CILSM.activity", nil)
for object in activities {
dispatch_async(queue, { () -> Void in
//design the context with `object`
self.saveChanges()
})
}
if complition != nil {
complition!(success: true, error: nil)
}
}
func saveChanges() {
if !CIDataManager.sharedManager().managedObjectContext.hasChanges {
return
}
CIDataManager.sharedManager().managedObjectContext.performBlock { () -> Void in
do {
try CIDataManager.sharedManager().managedObjectContext.save()
print("save")
} catch {
print("Error : \(error)")
}
}
}
崩溃日志
2016-03-30 13:43:14.323 MyApp[2703:66401] -[__NSCFNumber length]: unrecognized selector sent to instance 0xb000000000000002
2016-03-30 13:43:27.714 MyApp[2703:66401] CoreData: error: Serious application error. Exception was caught during Core Data change processing. This is usually a bug within an observer of NSManagedObjectContextObjectsDidChangeNotification. -[__NSCFNumber length]: unrecognized selector sent to instance 0xb000000000000002 with userInfo (null)
2016-03-30 13:43:31.958 MyApp[2703:66401] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFNumber length]: unrecognized selector sent to instance 0xb000000000000002'
*** First throw call stack:
(
0 CoreFoundation 0x0000000105bfde65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x0000000105534deb objc_exception_throw + 48
2 CoreFoundation 0x0000000105c0648d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x0000000105b5390a ___forwarding___ + 970
4 CoreFoundation 0x0000000105b534b8 _CF_forwarding_prep_0 + 120
5 CoreFoundation 0x0000000105ad5dfa CFStringCompareWithOptionsAndLocale + 202
6 Foundation 0x00000001021a1e37 -[NSString compare:options:range:] + 29
7 Foundation 0x000000010222d3bd -[NSComparisonPredicateOperator performPrimitiveOperationUsingObject:andObject:] + 365
8 Foundation 0x00000001021fb719 -[NSPredicateOperator performOperationUsingObject:andObject:] + 286
9 Foundation 0x00000001021fae3c -[NSComparisonPredicate evaluateWithObject:substitutionVariables:] + 313
10 CoreData 0x0000000104a1f931 -[NSFetchedResultsController(PrivateMethods) _objectInResults:] + 97
11 CoreData 0x0000000104a1fb09 -[NSFetchedResultsController(PrivateMethods) _preprocessInsertedObjects:insertsInfo:newSectionNames:] + 265
12 CoreData 0x0000000104a21dc6 __77-[NSFetchedResultsController(PrivateMethods) _managedObjectContextDidChange:]_block_invoke + 1366
13 CoreData 0x00000001049348a7 developerSubmittedBlockToNSManagedObjectContextPerform + 199
14 CoreData 0x000000010493476e -[NSManagedObjectContext performBlockAndWait:] + 222
15 CoreData 0x0000000104a21857 -[NSFetchedResultsController(PrivateMethods) _managedObjectContextDidChange:] + 119
16 CoreFoundation 0x0000000105bca69c __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ + 12
17 CoreFoundation 0x0000000105bca3db _CFXRegistrationPost + 427
18 CoreFoundation 0x0000000105bca142 ___CFXNotificationPost_block_invoke + 50
19 CoreFoundation 0x0000000105c0f972 -[_CFXNotificationRegistrar find:object:observer:enumerator:] + 1986
20 CoreFoundation 0x0000000105ac5279 _CFXNotificationPost + 633
21 Foundation 0x0000000102199109 -[NSNotificationCenter postNotificationName:object:userInfo:] + 66
22 CoreData 0x000000010491a606 -[NSManagedObjectContext(_NSInternalNotificationHandling) _postObjectsDidChangeNotificationWithUserInfo:] + 70
23 CoreData 0x000000010491a58a -[NSManagedObjectContext(_NSInternalChangeProcessing) _createAndPostChangeNotification:deletions:updates:refreshes:deferrals:] + 1530
24 CoreData 0x0000000104914a0b -[NSManagedObjectContext(_NSInternalChangeProcessing) _processRecentChanges:] + 3147
25 CoreData 0x0000000104918444 -[NSManagedObjectContext save:] + 148
26 MyApp 0x0000000100f06a29 _TFC10MyApp21CILocalStorageManager11saveChangesfS0_FT_T_ + 217
27 MyApp 0x0000000100f06d12 _TToFC10MyApp21CILocalStorageManager11saveChangesfS0_FT_T_ + 34
28 MyApp 0x0000000100f037b0 _TFC10MyApp21CILocalStorageManager17storeHomeActivityfS0_FTCSo7NSArray10complitionGSqFT7successSb5errorGSqCSo7NSError__T___T_ + 384
29 MyApp 0x0000000100f03a34 _TToFC10MyApp21CILocalStorageManager17storeHomeActivityfS0_FTCSo7NSArray10complitionGSqFT7successSb5errorGSqCSo7NSError__T___T_ + 260
30 MyApp 0x0000000100eea766 _TFFFC10MyApp13CIDataManager25requestToLoadHomeActivityFS0_FT24requestToLoadNewActivitySb10completionGSqFT_T__5errorGSqFT9errorTypeOS_9ErrorType7messageGSqSS__T___T_U_FCSo7NSArrayT_U_FT_T_ + 502
31 MyApp 0x0000000100ea1f27 _TTRXFo__dT__XFdCb__dT__ + 39
32 libdispatch.dylib 0x000000010690ee5d _dispatch_call_block_and_release + 12
33 libdispatch.dylib 0x000000010692f49b _dispatch_client_callout + 8
34 libdispatch.dylib 0x00000001069172af _dispatch_main_queue_callback_4CF + 1738
35 CoreFoundation 0x0000000105b5dd09 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
36 CoreFoundation 0x0000000105b1f2c9 __CFRunLoopRun + 2073
37 CoreFoundation 0x0000000105b1e828 CFRunLoopRunSpecific + 488
38 GraphicsServices 0x00000001083b6ad2 GSEventRunModal + 161
39 UIKit 0x00000001026a6610 UIApplicationMain + 171
40 MyApp 0x0000000101002f1d main + 109
41 libdyld.dylib 0x000000010696492d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
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