仅一位客户的 iOS 应用程序崩溃

Question

我的一位客户报告持续崩溃，大约 75% 的时间他在应用程序中执行特定操作。该操作涉及一些图像处理。他使用的是 iPhone 4S(与我开发应用程序时使用的型号相同)和 iOS 7.1.1。没有其他客户报告过此问题。他已删除该应用程序并从应用程序商店重新安装。他使用的是应用程序的默认设置。我无法重现该问题。

线程 8 崩溃，但在我的代码(“gCard”)中没有显示任何行。问题似乎是“doesNotRecognizeSelector:”在我的代码中不显示任何行的线程中。我不明白这一点。 (该应用程序使用 Brad Larson 的 GPUImage，但我不知道这是否是一个因素。)

我需要帮助来理解转储以及下一步的建议。

{"name":"gCard","bug_type":"109","os_version":"iPhone OS 7.1.1 (11D201)","bundleID":"com.PFM3.Ghost-Card","version":"1.2.1 (1.2.1)","app_name":"gCard"}
Incident Identifier: E85F86F8-0F39-4E55-9EAD-48461F1EF955
CrashReporter Key:   64c031d9f1572910e1137bebea2b9be924396928
Hardware Model:      iPhone4,1
Process:             gCard [136]
Path:                /var/mobile/Applications/4E5D5D22-0202-47DE-B8B2-B9C9D90825B2/gCard.app/gCard
Identifier:          com.PFM3.Ghost-Card
Version:             1.2.1 (1.2.1)
Code Type:           ARM (Native)
Parent Process:      launchd [1]

Date/Time:           2014-06-23 00:03:18.728 -0700
OS Version:          iOS 7.1.1 (11D201)
Report Version:      104

Exception Type:  EXC_BREAKPOINT (SIGTRAP)
Exception Codes: 0x0000000000000001, 0x000000000000defe
Triggered by Thread:  8

Last Exception Backtrace:
0   CoreFoundation                  0x2ec27fce __exceptionPreprocess + 126
1   libobjc.A.dylib                 0x394a0cca objc_exception_throw + 34
2   CoreFoundation                  0x2ec2b962 -[NSObject(NSObject) doesNotRecognizeSelector:] + 198
3   CoreFoundation                  0x2ec2a24e ___forwarding___ + 702
4   CoreFoundation                  0x2eb797b4 _CF_forwarding_prep_0 + 20
5   UIFoundation                    0x36865a20 __NSStringDrawingEngine + 12200
6   UIFoundation                    0x368629a2 -[NSString(NSExtendedStringDrawing) drawWithRect:options:attributes:context:] + 146
7   UIKit                           0x3145cd1c -[UILabel _drawTextInRect:baselineCalculationOnly:] + 4220
8   UIKit                           0x314c3004 -[UILabel drawTextInRect:] + 496
9   UIKit                           0x314c2e06 -[UILabel drawRect:] + 74
10  UIKit                           0x314c2da0 -[UIView(CALayerDelegate) drawLayer:inContext:] + 368
11  QuartzCore                      0x310f02bc -[CALayer drawInContext:] + 96
12  QuartzCore                      0x310d9e3a CABackingStoreUpdate_ + 1850
13  QuartzCore                      0x311b4d68 ___ZN2CA5Layer8display_Ev_block_invoke + 48
14  QuartzCore                      0x310d96ee x_blame_allocations + 78
15  QuartzCore                      0x310d9396 CA::Layer::display_() + 1102
16  QuartzCore                      0x310bd038 CA::Layer::display_if_needed(CA::Transaction*) + 204
17  QuartzCore                      0x310bccd0 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 20
18  QuartzCore                      0x310bc6da CA::Context::commit_transaction(CA::Transaction*) + 226
19  QuartzCore                      0x310bc4ea CA::Transaction::commit() + 310
20  QuartzCore                      0x310e9a7e CA::Transaction::release_thread(void*) + 158
21  libsystem_pthread.dylib         0x39acb688 _pthread_tsd_cleanup + 160
22  libsystem_pthread.dylib         0x39acb406 _pthread_exit + 82
23  libsystem_pthread.dylib         0x39acabe2 _pthread_wqthread + 314
24  libsystem_pthread.dylib         0x39acaa94 start_wqthread + 4


Thread 0:
0   libsystem_kernel.dylib          0x39a50a58 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x39a50854 mach_msg + 44
2   CoreFoundation                  0x2ebf2896 __CFRunLoopServiceMachPort + 150
3   CoreFoundation                  0x2ebf1002 __CFRunLoopRun + 850
4   CoreFoundation                  0x2eb5bf0a CFRunLoopRunSpecific + 518
5   CoreFoundation                  0x2eb5bcee CFRunLoopRunInMode + 102
6   GraphicsServices                0x33ab465e GSEventRunModal + 134
7   UIKit                           0x314a7168 UIApplicationMain + 1132
8   gCard                           0x00089e12 main (main.m:16)
9   libdyld.dylib                   0x399adab4 start + 0

Thread 1:
0   libsystem_kernel.dylib          0x39a50808 kevent64 + 24
1   libdispatch.dylib               0x39992078 _dispatch_mgr_invoke + 228
2   libdispatch.dylib               0x39991dfe _dispatch_mgr_thread$VARIANT$mp + 34

Thread 2:
0   libsystem_kernel.dylib          0x39a50a58 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x39a50854 mach_msg + 44
2   CoreFoundation                  0x2ebf2896 __CFRunLoopServiceMachPort + 150
3   CoreFoundation                  0x2ebf0fbc __CFRunLoopRun + 780
4   CoreFoundation                  0x2eb5bf0a CFRunLoopRunSpecific + 518
5   CoreFoundation                  0x2eb5bcee CFRunLoopRunInMode + 102
6   Foundation                      0x2f54e1e6 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 250
7   Foundation                      0x2f59f09c -[NSRunLoop(NSRunLoop) run] + 76
8   gCard                           0x000cd8d4 +[AFURLConnectionOperation networkRequestThreadEntryPoint:] (AFURLConnectionOperation.m:151)
9   Foundation                      0x2f610a5a __NSThread__main__ + 1058
10  libsystem_pthread.dylib         0x39acc916 _pthread_body + 138
11  libsystem_pthread.dylib         0x39acc886 _pthread_start + 98
12  libsystem_pthread.dylib         0x39acaaa0 thread_start + 4

Thread 3:
0   libsystem_kernel.dylib          0x39a50a58 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x39a50854 mach_msg + 44
2   CoreFoundation                  0x2ebf2896 __CFRunLoopServiceMachPort + 150
3   CoreFoundation                  0x2ebf0fbc __CFRunLoopRun + 780
4   CoreFoundation                  0x2eb5bf0a CFRunLoopRunSpecific + 518
5   CoreFoundation                  0x2eb9f9fe CFRunLoopRun + 94
6   CoreMotion                      0x2f2193a8 ___lldb_unnamed_function1423$$CoreMotion + 724
7   libsystem_pthread.dylib         0x39acc916 _pthread_body + 138
8   libsystem_pthread.dylib         0x39acc886 _pthread_start + 98
9   libsystem_pthread.dylib         0x39acaaa0 thread_start + 4

Thread 4 name:  com.apple.NSURLConnectionLoader
Thread 4:
0   libsystem_kernel.dylib          0x39a50a58 mach_msg_trap + 20
1   libsystem_kernel.dylib          0x39a50854 mach_msg + 44
2   CoreFoundation                  0x2ebf2896 __CFRunLoopServiceMachPort + 150
3   CoreFoundation                  0x2ebf0fbc __CFRunLoopRun + 780
4   CoreFoundation                  0x2eb5bf0a CFRunLoopRunSpecific + 518
5   CoreFoundation                  0x2eb5bcee CFRunLoopRunInMode + 102
6   Foundation                      0x2f59b082 +[NSURLConnection(Loader) _resourceLoadLoop:] + 314
7   Foundation                      0x2f610a5a __NSThread__main__ + 1058
8   libsystem_pthread.dylib         0x39acc916 _pthread_body + 138
9   libsystem_pthread.dylib         0x39acc886 _pthread_start + 98
10  libsystem_pthread.dylib         0x39acaaa0 thread_start + 4

Thread 5 name:  com.apple.CFSocket.private
Thread 5:
0   libsystem_kernel.dylib          0x39a63434 __select + 20
1   CoreFoundation                  0x2ebf6758 __CFSocketManager + 480
2   libsystem_pthread.dylib         0x39acc916 _pthread_body + 138
3   libsystem_pthread.dylib         0x39acc886 _pthread_start + 98
4   libsystem_pthread.dylib         0x39acaaa0 thread_start + 4

Thread 6:
0   libsystem_kernel.dylib          0x39a63c70 __workq_kernreturn + 8
1   libsystem_pthread.dylib         0x39acabda _pthread_wqthread + 306
2   libsystem_pthread.dylib         0x39acaa94 start_wqthread + 4

Thread 7:
0   libsystem_kernel.dylib          0x39a63c70 __workq_kernreturn + 8
1   libsystem_pthread.dylib         0x39acabda _pthread_wqthread + 306
2   libsystem_pthread.dylib         0x39acaa94 start_wqthread + 4

Thread 8 Crashed:
0   libsystem_c.dylib               0x39a1404e __abort + 102
1   libsystem_c.dylib               0x39a13fe4 abort + 84
2   libc++abi.dylib                 0x38d42cd2 abort_message + 70
3   libc++abi.dylib                 0x38d5b6e0 default_terminate_handler() + 248
4   libobjc.A.dylib                 0x394a0f62 _objc_terminate() + 190
5   libc++abi.dylib                 0x38d591c4 std::__terminate(void (*)()) + 76
6   libc++abi.dylib                 0x38d58a18 __cxa_throw + 112
7   libobjc.A.dylib                 0x394a0d9e objc_exception_throw + 246
8   CoreFoundation                  0x2ec2b962 -[NSObject(NSObject) doesNotRecognizeSelector:] + 198
9   CoreFoundation                  0x2ec2a24e ___forwarding___ + 702
10  CoreFoundation                  0x2eb797b4 _CF_forwarding_prep_0 + 20
11  UIFoundation                    0x36865a20 __NSStringDrawingEngine + 12200
12  UIFoundation                    0x368629a2 -[NSString(NSExtendedStringDrawing) drawWithRect:options:attributes:context:] + 146
13  UIKit                           0x3145cd1c -[UILabel _drawTextInRect:baselineCalculationOnly:] + 4220
14  UIKit                           0x314c3004 -[UILabel drawTextInRect:] + 496
15  UIKit                           0x314c2e06 -[UILabel drawRect:] + 74
16  UIKit                           0x314c2da0 -[UIView(CALayerDelegate) drawLayer:inContext:] + 368
17  QuartzCore                      0x310f02bc -[CALayer drawInContext:] + 96
18  QuartzCore                      0x310d9e3c CABackingStoreUpdate_ + 1852
19  QuartzCore                      0x311b4d68 ___ZN2CA5Layer8display_Ev_block_invoke + 48
20  QuartzCore                      0x310d96f0 x_blame_allocations + 80
21  QuartzCore                      0x310d9396 CA::Layer::display_() + 1102
22  QuartzCore                      0x310bd038 CA::Layer::display_if_needed(CA::Transaction*) + 204
23  QuartzCore                      0x310bccd0 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 20
24  QuartzCore                      0x310bc6da CA::Context::commit_transaction(CA::Transaction*) + 226
25  QuartzCore                      0x310bc4ea CA::Transaction::commit() + 310
26  QuartzCore                      0x310e9a7e CA::Transaction::release_thread(void*) + 158
27  libsystem_pthread.dylib         0x39acb68a _pthread_tsd_cleanup + 162
28  libsystem_pthread.dylib         0x39acb406 _pthread_exit + 82
29  libsystem_pthread.dylib         0x39acabe2 _pthread_wqthread + 314
30  libsystem_pthread.dylib         0x39acaa94 start_wqthread + 4

Thread 8 crashed with ARM Thread State (32-bit):
    r0: 0x00000000    r1: 0x00000000      r2: 0x00000000      r3: 0x00000001
    r4: 0x06277c84    r5: 0xffffffff      r6: 0x00000000      r7: 0x06277c94
    r8: 0x1767ed40    r9: 0x39ac7f69     r10: 0x368b94c8     r11: 0x00000000
    ip: 0x00000030    sp: 0x06277c7c      lr: 0x39a1404f      pc: 0x39a1404e
  cpsr: 0x40000030

Answer 1

您应该/必须在主线程上执行所有(或几乎所有)特定于用户界面的操作。可能您更改了对另一个 block 执行的 block 中的 View 层次结构。