iOS Crash Log Interpretation

Question

Meine Einreichung im App Store wurde aufgrund eines Absturzes abgelehnt. Ich kann den Absturz jedoch nicht auf mehreren Hardwaregeräten und Simulatoren reproduzieren. Ich habe das Absturzprotokoll symbolisiert und es scheint, dass das Problem in einem Codebereich auftritt, in dem die App einige Daten von einem Server abruft und einen UIAlertController schließt, der den Benutzer auf "Bitte warten ..." hinweist Log. Irgendwelche Ideen zum Lokalisieren der Ursache würden geschätzt werden.

Date/Time:   2017-05-06 00:27:06.7009 +0700 
Launch Time:   2017-05-06 00:26:43.8793 +0700 
OS Version:   iPhone OS 10.3.1 (14E304) 
Report Version:  104 

Exception Type: EXC_CRASH (SIGABRT) 
Exception Codes: 0x0000000000000000, 0x0000000000000000 
Exception Note: EXC_CORPSE_NOTIFY 
Triggered by Thread: 1 

Application Specific Information: 
abort() called 

Filtered syslog: 
None found 

Last Exception Backtrace: 
0 CoreFoundation     0x18c47efd8 __exceptionPreprocess + 124 
1 libobjc.A.dylib     0x18aee0538 objc_exception_throw + 56 
2 CoreFoundation     0x18c47eeac +[NSException raise:format:arguments:] + 104 
3 Foundation      0x18cf16710 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 112 
4 UIKit       0x192823454 -[UIApplication _cachedSystemAnimationFenceCreatingIfNecessary:] + 196 
5 UIKit       0x192823514 -[UIApplication _systemAnimationFenceCreatingIfNecessary:] + 24 
6 UIKit       0x19287c7a0 +[UIWindow _synchronizedDrawingFence] + 116 
7 UIKit       0x192a3a150 +[_UIKeyboardChangedInformation informationForKeyboardUp:withIAV:] + 104 
8 UIKit       0x192d338d4 -[_UIRemoteKeyboards prepareToMoveKeyboard:withIAV:showing:forScreen:] + 464 
9 UIKit       0x19266bc04 -[UIPeripheralHost(UIKitInternal) setInputViews:animationStyle:] + 820 
10 UIKit       0x192688cf4 -[UIPeripheralHost(UIKitInternal) _restoreInputViewsWithId:animated:] + 584 
11 UIKit       0x19291bd64 -[UIViewController _restoreInputViewsForPresentation] + 280 
12 UIKit       0x1928f6e3c -[UIPresentationController runTransitionForCurrentState] + 1560 
13 UIKit       0x1928f50f8 -[UIPresentationController _dismissWithAnimationController:interactionController:target:didEndSelector:] + 764 
14 UIKit       0x19291b8c0 -[UIViewController _dismissViewControllerWithAnimationController:interactionController:completion:] + 464 
15 UIKit       0x1926d0cd4 -[UIViewController _dismissViewControllerWithTransition:from:completion:] + 600 
16 UIKit       0x192678b6c -[UIViewController dismissViewControllerWithTransition:completion:] + 1144 
17 UIKit       0x19267894c -[UIViewController dismissViewControllerWithTransition:completion:] + 600 
18 UIKit       0x19291ab68 -[UIViewController _performCoordinatedPresentOrDismiss:animated:] + 524 
19 UIKit       0x1926786c0 -[UIViewController dismissViewControllerAnimated:completion:] + 152 
20 DinokEtp      0x1001014c4 specialized ViewController.(downloadCaseTypesFile(workFlowVersionMobileShouleBeOn : Double, validateUserResponse : ValidateUserResponse) ->()).(closure #1) (ViewController.swift:360) 
21 DinokEtp      0x1000fd84c ViewController.(downloadCaseTypesFile(workFlowVersionMobileShouleBeOn : Double, validateUserResponse : ValidateUserResponse) ->()).(closure #1) (ViewController.swift:0) 
22 DinokEtp      0x100101b38 partial apply for ViewController.(downloadCaseTypesFile(workFlowVersionMobileShouleBeOn : Double, validateUserResponse : ValidateUserResponse) ->()).(closure #1) (ViewController.swift:0) 
23 CFNetwork      0x18ca89358 __85-[__NSURLSessionLocal downloadTaskForRequest:downloadFilePath:resumeData:completion:]_block_invoke + 32 
24 CFNetwork      0x18caeb18c __50-[__NSCFLocalDownloadTask _private_fileCompletion]_block_invoke.321 + 84 
25 Foundation      0x18cf4d804 __NSBLOCKOPERATION_IS_CALLING_OUT_TO_A_BLOCK__ + 16 
26 Foundation      0x18ce92760 -[NSBlockOperation main] + 96 
27 Foundation      0x18ce82b18 -[__NSOperationInternal _start:] + 612 
28 Foundation      0x18cf4fba0 __NSOQSchedule_f + 228 
29 libdispatch.dylib    0x18b3369a0 _dispatch_client_callout + 16 
30 libdispatch.dylib    0x18b344ad4 _dispatch_queue_serial_drain + 928 
31 libdispatch.dylib    0x18b33a2cc _dispatch_queue_invoke + 884 
32 libdispatch.dylib    0x18b346a50 _dispatch_root_queue_drain + 540 
33 libdispatch.dylib    0x18b3467d0 _dispatch_worker_thread3 + 124 
34 libsystem_pthread.dylib   0x18b53f1d0 _pthread_wqthread + 1096 
35 libsystem_pthread.dylib   0x18b53ed7c start_wqthread + 4 


Thread 0 name: Dispatch queue: com.apple.main-thread 
Thread 0: 
0 libsystem_kernel.dylib   0x000000018b45b224 mach_msg_trap + 8 
1 libsystem_kernel.dylib   0x000000018b45b09c mach_msg + 72 
2 CoreFoundation     0x000000018c42ce88 __CFRunLoopServiceMachPort + 192 
3 CoreFoundation     0x000000018c42aadc __CFRunLoopRun + 1060 
4 CoreFoundation     0x000000018c35ad94 CFRunLoopRunSpecific + 424 
5 GraphicsServices    0x000000018ddc4074 GSEventRunModal + 100 
6 UIKit       0x000000019260c130 UIApplicationMain + 208 
7 DinokEtp      0x00000001000654bc main (EMSCaseUpload.swift:14) 
8 libdyld.dylib     0x000000018b36959c start + 4 

Thread 1 name: Dispatch queue: NSOperationQueue 0x17003e2c0 :: NSOperation 0x17025e5d0 (QOS: DEFAULT) 
Thread 1 Crashed: 
0 libsystem_kernel.dylib   0x000000018b479014 __pthread_kill + 8 
1 libsystem_pthread.dylib   0x000000018b543334 pthread_kill + 112 
2 libsystem_c.dylib    0x000000018b3ed9c4 abort + 140 
3 libc++abi.dylib     0x000000018aeb91b0 __cxa_bad_cast + 0 
4 libc++abi.dylib     0x000000018aed2c04 default_unexpected_handler() + 0 
5 libobjc.A.dylib     0x000000018aee0820 _objc_terminate() + 124 
6 libc++abi.dylib     0x000000018aecf5d4 std::__terminate(void (*)()) + 16 
7 libc++abi.dylib     0x000000018aecf640 std::terminate() + 60 
8 libdispatch.dylib    0x000000018b3369b4 _dispatch_client_callout + 36 
9 libdispatch.dylib    0x000000018b344ad4 _dispatch_queue_serial_drain + 928 
10 libdispatch.dylib    0x000000018b33a2cc _dispatch_queue_invoke + 884 
11 libdispatch.dylib    0x000000018b346a50 _dispatch_root_queue_drain + 540 
12 libdispatch.dylib    0x000000018b3467d0 _dispatch_worker_thread3 + 124 
13 libsystem_pthread.dylib   0x000000018b53f1d0 _pthread_wqthread + 1096 
14 libsystem_pthread.dylib   0x000000018b53ed7c start_wqthread + 4 

Thread 2: 
0 libsystem_pthread.dylib   0x000000018b53ed78 start_wqthread + 0 

Thread 3 name: com.apple.uikit.eventfetch-thread 
Thread 3: 
0 libsystem_kernel.dylib   0x000000018b45b224 mach_msg_trap + 8 
1 libsystem_kernel.dylib   0x000000018b45b09c mach_msg + 72 
2 CoreFoundation     0x000000018c42ce88 __CFRunLoopServiceMachPort + 192 
3 CoreFoundation     0x000000018c42aadc __CFRunLoopRun + 1060 
4 CoreFoundation     0x000000018c35ad94 CFRunLoopRunSpecific + 424 
5 Foundation      0x000000018ce74d64 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 304 
6 Foundation      0x000000018ce95b34 -[NSRunLoop(NSRunLoop) runUntilDate:] + 96 
7 UIKit       0x0000000192f965f8 -[UIEventFetcher threadMain] + 136 
8 Foundation      0x000000018cf722c8 __NSThread__start__ + 996 
9 libsystem_pthread.dylib   0x000000018b54175c _pthread_body + 240 
10 libsystem_pthread.dylib   0x000000018b54166c _pthread_body + 0 
11 libsystem_pthread.dylib   0x000000018b53ed84 thread_start + 4 

Thread 4: 
0 libsystem_kernel.dylib   0x000000018b479a88 __workq_kernreturn + 8 
1 libsystem_pthread.dylib   0x000000018b53f274 _pthread_wqthread + 1260 
2 libsystem_pthread.dylib   0x000000018b53ed7c start_wqthread + 4 

Thread 5: 
0 libsystem_pthread.dylib   0x000000018b53ed78 start_wqthread + 0 

Thread 6 name: com.apple.NSURLConnectionLoader 
Thread 6: 
0 libsystem_kernel.dylib   0x000000018b45b224 mach_msg_trap + 8 
1 libsystem_kernel.dylib   0x000000018b45b09c mach_msg + 72 
2 CoreFoundation     0x000000018c42ce88 __CFRunLoopServiceMachPort + 192 
3 CoreFoundation     0x000000018c42aadc __CFRunLoopRun + 1060 
4 CoreFoundation     0x000000018c35ad94 CFRunLoopRunSpecific + 424 
5 CFNetwork      0x000000018cb66ca4 +[NSURLConnection(Loader) _resourceLoadLoop:] + 404 
6 Foundation      0x000000018cf722c8 __NSThread__start__ + 996 
7 libsystem_pthread.dylib   0x000000018b54175c _pthread_body + 240 
8 libsystem_pthread.dylib   0x000000018b54166c _pthread_body + 0 
9 libsystem_pthread.dylib   0x000000018b53ed84 thread_start + 4 

Thread 1 crashed with ARM Thread State (64-bit): 
    x0: 0x0000000000000000 x1: 0x0000000000000000 x2: 0x0000000000000000 x3: 0x00000001700f8c37 
    x4: 0x000000018aed3b07 x5: 0x000000016de9a850 x6: 0x000000000000006e x7: 0xffffffffffffffec 
    x8: 0x000000000c000000 x9: 0x0000000004000000 x10: 0x000000000000000b x11: 0x000000000000000b 
    x12: 0x0000000000000010 x13: 0x000000018c6c9c0e x14: 0x0000030000000300 x15: 0x0000000000000000 
    x16: 0x0000000000000148 x17: 0x0000000000000000 x18: 0x0000000000000000 x19: 0x0000000000000006 
    x20: 0x000000016de9b000 x21: 0x000000016de9a850 x22: 0x00000001700ff380 x23: 0x0000000000000004 
    x24: 0x00000001b1ebd400 x25: 0x0000000000000000 x26: 0x00000001b1ebd400 x27: 0x000000016de9b0e0 
    x28: 0x0000000000000000 fp: 0x000000016de9a7b0 lr: 0x000000018b543334 
    sp: 0x000000016de9a790 pc: 0x000000018b479014 cpsr: 0x00000000 

Answer 1

würde ich ein doppelte Überprüfung empfehlen, dass Sie nicht mit diesen UIAlertController (oder jeder anderen UIKit API) außerhalb des Haupt-Thread (aka, Thread 0 oben) interagieren. Viele UIKit-APIs sind so konzipiert, dass sie vom Hauptthread aus nur verwendet werden können.

Bemerkenswert, dass der Absturz auf Thread 1 passiert ...

Wenn Sie im Zweifel sind, wickeln Sie den Anruf mit:

DispatchQueue.main.async { 
    // Call UIAlertController code here... 
}