应用程序更新后的CoreData崩溃 [英] CoreData Crash after App Update
问题描述
我有一个非常恼人的问题。我有一个CoreData应用程序，目前在生产和一切工作正常。我有一个应用程序的更新，但每当更新安装在原始应用程序时，应用程序崩溃就在下面的代码行。
I have a very annoying issue. I have a "CoreData" app that is currently in production and everything works fine. I have an update for the app, but whenever the update is installed over the original app the app crashes right on the line of code below.
[_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:options error:&error]
我收到的错误是无法使用具有提取属性描述（实体模型不匹配）的获取请求。
The error I receive is "Can't use fetch request with fetched property description (entity model mismatch).".
CoreData模型已更改，但是我为我的更改创建了一个新版本的模型，因此它应该将更改合并到新模型中。这是我做过一百次的同一个过程，总是工作。除了这一次。
There have been changes to the CoreData model, but I created a new version of the model for my changes, so it should merge the changes into the new model. This is the same process I have done a hundred times, and always works. Except for this time.
我能想到的唯一的区别可能会导致这个问题是，我从CoreData模型中删除了一些旧的获取请求，但是，在更新的模型版本中完成，而不是原始模型。
The only difference I can think of that could cause this issue is that I removed some old Fetch Requests from the CoreData model, but once again this was done in the updated model version and not the original model.
你们都知道什么可能导致这种情况吗？正如我所提到的，我更新了CoreData模型版本，并将其选择为我当前的应用程序模型。另外，很奇怪的是，崩溃只发生在第一次运行应用程序更新后。发生崩溃后，我可以重新启动应用程序，一切正常。
Do you all have any idea what could cause this? As I mentioned I did update the CoreData model version and selected it as my current model for the app. Also, what is very strange is the crash only happens the first time you run the app after the update. After the crash occurs I can re-launch the app and everything works fine.
谢谢！
* EDIT **！
!** EDIT **!
如果这有助于我的调用堆栈。
If this helps here is my call stack.
Last Exception Backtrace:
0 CoreFoundation 0x32ac029e __exceptionPreprocess + 158
1 libobjc.A.dylib 0x3a95697a objc_exception_throw + 26
2 CoreFoundation 0x32ac01c0 +[NSException raise:format:] + 100
3 CoreData 0x328a2678 -[NSFetchedPropertyDescription setFetchRequest:] + 164
4 CoreData 0x328a2788 -[NSFetchedPropertyDescription _createCachesAndOptimizeState] + 76
5 CoreData 0x32899b0a -[NSEntityDescription(_NSInternalMethods) _createCachesAndOptimizeState] + 1238
6 CoreData 0x328d18a6 -[NSManagedObjectModel(_NSInternalMethods) _createCachesAndOptimizeState] + 702
7 CoreData 0x3284e534 -[NSManagedObjectModel(_NSInternalMethods) _setIsEditable:optimizationStyle:] + 272
8 CoreData 0x3284e2f2 -[NSPersistentStoreCoordinator initWithManagedObjectModel:] + 302
9 CoreData 0x32939c4c -[NSSQLiteInPlaceMigrationManager migrateStoreFromURL:type:options:withMappingModel:toDestinationURL:destinationType:destinationOptions:error:] + 692
10 CoreData 0x328da838 -[NSMigrationManager migrateStoreFromURL:type:options:withMappingModel:toDestinationURL:destinationType:destinationOptions:error:] + 512
11 CoreData 0x3292bc54 -[NSStoreMigrationPolicy(InternalMethods) migrateStoreAtURL:toURL:storeType:options:withManager:error:] + 276
12 CoreData 0x3292afa8 -[NSStoreMigrationPolicy migrateStoreAtURL:withManager:metadata:options:error:] + 84
13 CoreData 0x3292c4b2 -[NSStoreMigrationPolicy(InternalMethods) _gatherDataAndPerformMigration:] + 1930
14 CoreData 0x3284f384 -[NSPersistentStoreCoordinator addPersistentStoreWithType:configuration:URL:options:error:] + 3340
15 MSM iPad 0x001cb4c2 -[VS_CoreDataManager persistentStoreCoordinator] + 466
16 MSM iPad 0x001cbb12 -[VS_CoreDataManager initializeCoreDataWithProjectName:] + 94
17 MSM iPad 0x000b6678 -[AppDelegate application:didFinishLaunchingWithOptions:] (AppDelegate.m:117)
18 UIKit 0x34928ad4 -[UIApplication _handleDelegateCallbacksWithOptions:isSuspended:restoreState:] + 248
19 UIKit 0x3492865e -[UIApplication _callInitializationDelegatesForURL:payload:suspended:] + 1186
20 UIKit 0x34920846 -[UIApplication _runWithURL:payload:launchOrientation:statusBarStyle:statusBarHidden:] + 694
21 UIKit 0x348c8c34 -[UIApplication handleEvent:withNewEvent:] + 1000
22 UIKit 0x348c86c8 -[UIApplication sendEvent:] + 68
23 UIKit 0x348c8116 _UIApplicationHandleEvent + 6150
24 GraphicsServices 0x365bc59e _PurpleEventCallback + 586
25 GraphicsServices 0x365bc1ce PurpleEventCallback + 30
26 CoreFoundation 0x32a9516e __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 30
27 CoreFoundation 0x32a95112 __CFRunLoopDoSource1 + 134
28 CoreFoundation 0x32a93f94 __CFRunLoopRun + 1380
29 CoreFoundation 0x32a06eb8 CFRunLoopRunSpecific + 352
30 CoreFoundation 0x32a06d44 CFRunLoopRunInMode + 100
31 UIKit 0x3491f480 -[UIApplication _run] + 664
32 UIKit 0x3491c2fc UIApplicationMain + 1116
33 MSM iPad 0x000b6432 main (main.m:17)
34 libdyld.dylib 0x3ad8db1c start + 0
推荐答案
我发现我必须在应用程序更新后删除缓存：
I've found I must delete the cache after app updates:
/ p>
Either don't cache fetched items
NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:nil];
或在更新时删除缓存
[NSFetchedResultsController deleteCacheWithName:@"Master"];
这篇关于应用程序更新后的CoreData崩溃的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
