我有一位用户声称我的Core Data应用程序没有在他的Mac上保存数据。我无法重现这个问题，即使是完全相同的配置。
我能获得的所有信息都是我的应用程序记录到用户控制台的消息（见下文）。也许它是相关的，也许不是。
有人可以解释这条消息吗？ 如果没有，我将如何继续调查此问题？
9/19/16 2:13:34.053 PM [MyApp][18563]: -[__NSCFNumber localizedStandardCompare:]: unrecognized selector sent to instance 0x7df27
9/19/16 2:13:34.053 PM [MyApp][18563]: An uncaught exception was raised
9/19/16 2:13:34.053 PM [MyApp][18563]: -[__NSCFNumber localizedStandardCompare:]: unrecognized selector sent to instance 0x7df27
9/19/16 2:13:34.055 PM [MyApp][18563]: (
0 CoreFoundation 0x00007fff8e7edbd2 __exceptionPreprocess + 178
1 libobjc.A.dylib 0x00007fff995614fa objc_exception_throw + 48
2 CoreFoundation 0x00007fff8e8570ed -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x00007fff8e75e3d1 ___forwarding___ + 1009
4 CoreFoundation 0x00007fff8e75df58 _CF_forwarding_prep_0 + 120
5 Foundation 0x00007fff99071aa9 _NSCompareObject + 49
6 Foundation 0x00007fff990e2f0f _NSSortFunctionMany + 643
7 CoreFoundation 0x00007fff8e7540a1 __CFSimpleMergeSort + 81
8 CoreFoundation 0x00007fff8e75414e __CFSimpleMergeSort + 254
9 CoreFoundation 0x00007fff8e754139 __CFSimpleMergeSort + 233
10 CoreFoundation 0x00007fff8e754139 __CFSimpleMergeSort + 233
11 CoreFoundation 0x00007fff8e753ffd CFSortIndexes + 541
12 CoreFoundation 0x00007fff8e7904c9 CFMergeSortArray + 249
13 Foundation 0x00007fff990717d1 _sortedObjectsUsingDescriptors + 611
14 Foundation 0x00007fff990e2c2f -[NSMutableArray(NSKeyValueSorting) sortUsingDescriptors:] + 466
15 AppKit 0x00007fff95571a1e -[NSArrayController _sortObjects:] + 305
16 AppKit 0x00007fff9556f2bc -[NSArrayController _arrangeObjectsWithSelectedObjects:avoidsEmptySelection:operationsMask:useBasis:] + 181
17 [MyApp] 0x000000010bd1671e [MyApp] + 10014
18 libsystem_trace.dylib 0x00007fff978ff082 _os_activity_initiate + 75
19 AppKit 0x00007fff9559dcf1 -[NSApplication sendAction:to:from:] + 460
20 AppKit 0x00007fff9559da8b -[NSMenuItem _corePerformAction] + 336
21 AppKit 0x00007fff9559d7eb -[NSCarbonMenuImpl performActionWithHighlightingForItemAtIndex:] + 114
22 libsystem_trace.dylib 0x00007fff978ff082 _os_activity_initiate + 75
23 AppKit 0x00007fff9563003c -[NSMenu performActionForItemAtIndex:] + 131
24 AppKit 0x00007fff9562ffaf -[NSMenu _internalPerformActionForItemAtIndex:] + 35
25 AppKit 0x00007fff9562fe07 -[NSCarbonMenuImpl _carbonCommandProcessEvent:handlerCallRef:] + 107
26 AppKit 0x00007fff954d4575 NSSLMMenuEventHandler + 708
27 HIToolbox 0x00007fff98c1298e _ZL23DispatchEventToHandlersP14EventTargetRecP14OpaqueEventRefP14HandlerCallRec + 1231
28 HIToolbox 0x00007fff98c11e18 _ZL30SendEventToEventTargetInternalP14OpaqueEventRefP20OpaqueEventTargetRefP14HandlerCallRec + 404
29 HIToolbox 0x00007fff98c27df6 SendEventToEventTarget + 40
30 HIToolbox 0x00007fff98c71d2e _ZL18SendHICommandEventjPK9HICommandjjhPKvP20OpaqueEventTargetRefS5_PP14OpaqueEventRef + 411
31 HIToolbox 0x00007fff98c9d0f7 SendMenuCommandWithContextAndModifiers + 59
32 HIToolbox 0x00007fff98c9d0a8 SendMenuItemSelectedEvent + 188
33 HIToolbox 0x00007fff98c9cf84 _ZL19FinishMenuSelectionP13SelectionDataP10MenuResultS2_ + 96
34 HIToolbox 0x00007fff98c9d92e _ZL14MenuSelectCoreP8MenuData5PointdjPP13OpaqueMenuRefPt + 711
35 HIToolbox 0x00007fff98c9d5c8 _HandleMenuSelection2 + 460
36 AppKit 0x00007fff954bf6c6 _NSHandleCarbonMenuEvent + 277
37 AppKit 0x00007fff9533457d _DPSNextEvent + 1906
38 AppKit 0x00007fff95333665 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
39 AppKit 0x00007fff953281c8 -[NSApplication run] + 682
40 AppKit 0x00007fff952f145e NSApplicationMain + 1176
41 libdyld.dylib 0x00007fff88fbf5ad start + 1
答案 0 :(得分：0)
您需要表示堆栈跟踪。
基本上，敏感信息已被隐藏，并被唯一标识符取代。当您作为应用程序的开发人员使用正确的工具时，您可以在名为 symbolication 的过程中将这些标识符转换为有用的符号（方法调用等）。
有关更多详细信息和分步过程，请参阅以下教程： https://www.raywenderlich.com/23704/demystifying-ios-application-crash-logs