仅在 iOS 14 中崩溃核心数据
Posted
技术标签:
【中文标题】仅在 iOS 14 中崩溃核心数据【英文标题】：Crash Core Data only in iOS 14 【发布时间】：2020-09-21 16:29:53 【问题描述】：我在一个使用 CoreData 的应用程序上工作，在 ios 13 和 iOS 14 上一切正常，具有不同的 Xcode 测试版。但自从 Apple 发布了 iOS 14 和 Xcode 12 的官方版本后，当我尝试从 CoreData 获取一些对象时，我遇到了崩溃。
guard let customers = Customer.mr_findAllSorted(by: "login", ascending: true) as? [Customer] else return
控制台输出：
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't get value for 'batch' in bindings
.'
当我尝试使用断点从控制台日志打印对象时，我有一个对象的内存地址，但是当我尝试打印该对象的一些值时，我遇到了这个错误：
error: warning: couldn't get required object pointer (substituting NULL): Couldn't load 'self' because its value couldn't be evaluated
error: Execution was interrupted, reason: internal ObjC exception breakpoint(-5)..
The process has been returned to the state before expression evaluation.
自从正式版以来，有没有人处理过这类错误？
提前感谢您的帮助。
【问题讨论】：
是“客户”NSManageObject 类型吗？如果是，请检查是否有故障 【参考方案1】：我们在我们的应用中也看到了这一点。它只能在 iOS 14 和 Xcode 12.0.1 中的最新 SDK 上重现，但我们还没有任何解决方案或答案来解释为什么会发生这种情况。
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't get value for 'batch' in bindings
.'
*** First throw call stack:
(
0 CoreFoundation 0x00007fff2043a126 __exceptionPreprocess + 242
1 libobjc.A.dylib 0x00007fff20177f78 objc_exception_throw + 48
2 Foundation 0x00007fff2088bedc -[NSVariableExpression _expressionWithSubstitutionVariables:] + 0
3 Foundation 0x00007fff2075ac7b -[NSComparisonPredicate evaluateWithObject:substitutionVariables:] + 264
4 CoreData 0x00007fff2511ec68 -[NSDictionaryStoreMap handleFetchRequest:] + 481
5 CoreData 0x00007fff2511dfd2 -[NSMappedObjectStore executeFetchRequest:withContext:] + 230
6 CoreData 0x00007fff251e10a2 __65-[NSPersistentStoreCoordinator executeRequest:withContext:error:]_block_invoke.797 + 3219
7 CoreData 0x00007fff251d988d __55-[NSPersistentStoreCoordinator _routeHeavyweightBlock:]_block_invoke + 55
8 CoreData 0x00007fff251edf0a gutsOfBlockToNSPersistentStoreCoordinatorPerform + 182
9 libdispatch.dylib 0x000000010a6b0a88 _dispatch_client_callout + 8
10 libdispatch.dylib 0x000000010a6bfcac _dispatch_lane_barrier_sync_invoke_and_complete + 132
11 CoreData 0x00007fff251d9492 _perform + 169
12 CoreData 0x00007fff251d9740 -[NSPersistentStoreCoordinator _routeHeavyweightBlock:] + 172
13 CoreData 0x00007fff250d640e -[NSPersistentStoreCoordinator executeRequest:withContext:error:] + 1684
14 CoreData 0x00007fff250d49c2 -[NSManagedObjectContext executeFetchRequest:error:] + 885
15 CoreData 0x00007fff251a9d7f -[NSManagedObjectContext _parentObjectsForFetchRequest:inContext:error:] + 477
16 CoreData 0x00007fff251aa774 __82-[NSManagedObjectContext(_NestedContextSupport) executeRequest:withContext:error:]_block_invoke + 603
17 CoreData 0x00007fff25109de8 internalBlockToNSManagedObjectContextPerform + 89
18 libdispatch.dylib 0x000000010a6b0a88 _dispatch_client_callout + 8
19 libdispatch.dylib 0x000000010a6bfcac _dispatch_lane_barrier_sync_invoke_and_complete + 132
20 CoreData 0x00007fff25109d6f _perform + 196
21 CoreData 0x00007fff25109b93 -[NSManagedObjectContext(_NestedContextSupport) executeRequest:withContext:error:] + 175
22 CoreData 0x00007fff250d49c2 -[NSManagedObjectContext executeFetchRequest:error:] + 885
23 CoreData 0x00007fff251a9d7f -[NSManagedObjectContext _parentObjectsForFetchRequest:inContext:error:] + 477
24 CoreData 0x00007fff251aa774 __82-[NSManagedObjectContext(_NestedContextSupport) executeRequest:withContext:error:]_block_invoke + 603
25 CoreData 0x00007fff25109de8 internalBlockToNSManagedObjectContextPerform + 89
26 libdispatch.dylib 0x000000010a6b0a88 _dispatch_client_callout + 8
27 libdispatch.dylib 0x000000010a6bfe11 _dispatch_async_and_wait_invoke + 175
28 libdispatch.dylib 0x000000010a6b0a88 _dispatch_client_callout + 8
29 libdispatch.dylib 0x000000010a6bef23 _dispatch_main_queue_callback_4CF + 1152
30 CoreFoundation 0x00007fff203a8276 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 9
31 CoreFoundation 0x00007fff203a2b06 __CFRunLoopRun + 2685
32 CoreFoundation 0x00007fff203a1b9e CFRunLoopRunSpecific + 567
33 GraphicsServices 0x00007fff2b773db3 GSEventRunModal + 139
34 UIKitCore 0x00007fff24660af3 -[UIApplication _run] + 912
35 UIKitCore 0x00007fff24665a04 UIApplicationMain + 101
36 XXXX 0x0000000106de2d69 main + 153
37 libdyld.dylib 0x00007fff20257415 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Can't get value for 'batch' in bindings
.'
【讨论】：
【参考方案2】：您可以将批量大小设置为 0 [NSManagedObject MR_setDefaultBatchSize:0];，但之后检查您的性能。
【讨论】：
这似乎为我解决了问题以上是关于仅在 iOS 14 中崩溃核心数据的主要内容，如果未能解决你的问题，请参考以下文章
UIPrintInteractionController 仅在 iOS 14 上单击“取消”按钮时崩溃
使用带有 ios 5 核心数据并发的 RestKit 时崩溃