Question

我刚刚将应用程序上传到appstore，它是为ios7开发的。

他们拒绝了应用程序因为崩溃我无法重现... 他们给我发了这份崩溃报告：

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Subtype: KERN_INVALID_ADDRESS at 0x0000000000000008
Triggered by Thread:  0

Thread 0 name:  Dispatch queue: com.apple.main-thread
Thread 0 Crashed:
0   libobjc.A.dylib                 0x000000018e0501c8 objc_msgSend + 8
1   UIKit                           0x000000018493e940 __97-[UITabBarController transitionFromViewController:toViewController:transition:shouldSetSelected:]_block_invoke718 + 52
2   UIKit                           0x00000001846b6504 -[UIViewController _executeAfterAppearanceBlock] + 60
3   UIKit                           0x00000001846b646c _applyBlockToCFArrayCopiedToStack + 352
4   UIKit                           0x00000001846224c8 _afterCACommitHandler + 540
5   CoreFoundation                  0x00000001816270a4 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 28
6   CoreFoundation                  0x000000018162432c __CFRunLoopDoObservers + 368
7   CoreFoundation                  0x00000001816246b8 __CFRunLoopRun + 760
8   CoreFoundation                  0x00000001815656cc CFRunLoopRunSpecific + 448
9   GraphicsServices                0x0000000187201c08 GSEventRunModal + 164
10  UIKit                           0x0000000184696fd8 UIApplicationMain + 1152
11  brandnooz                       0x00000001000aaa0c 0x100038000 + 469516
12  libdyld.dylib                   0x000000018e633a9c start + 0

Thread 1 name:  Dispatch queue: com.apple.libdispatch-manager
Thread 1:
0   libsystem_kernel.dylib          0x000000018e715aa8 kevent64 + 8
1   libdispatch.dylib               0x000000018e619998 _dispatch_mgr_thread + 48

Thread 2 name:  AFNetworking
Thread 2:
0   libsystem_kernel.dylib          0x000000018e715ca0 mach_msg_trap + 8
1   CoreFoundation                  0x0000000181626570 __CFRunLoopServiceMachPort + 180
2   CoreFoundation                  0x0000000181624700 __CFRunLoopRun + 832
3   CoreFoundation                  0x00000001815656cc CFRunLoopRunSpecific + 448
4   Foundation                      0x00000001821012c0 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 292
5   Foundation                      0x000000018215ed74 -[NSRunLoop(NSRunLoop) run] + 92
6   brandnooz                       0x0000000100045280 0x100038000 + 53888
7   Foundation                      0x00000001821e8408 __NSThread__main__ + 996
8   libsystem_pthread.dylib         0x000000018e7afe18 _pthread_body + 164
9   libsystem_pthread.dylib         0x000000018e7afd70 _pthread_start + 136
10  libsystem_pthread.dylib         0x000000018e7ad550 thread_start + 0

Thread 3 name:  com.apple.NSURLConnectionLoader
Thread 3:
0   libsystem_kernel.dylib          0x000000018e715ca0 mach_msg_trap + 8
1   CoreFoundation                  0x0000000181626570 __CFRunLoopServiceMachPort + 180
2   CoreFoundation                  0x0000000181624700 __CFRunLoopRun + 832
3   CoreFoundation                  0x00000001815656cc CFRunLoopRunSpecific + 448
4   Foundation                      0x000000018215a424 +[NSURLConnection(Loader) _resourceLoadLoop:] + 344
5   Foundation                      0x00000001821e8408 __NSThread__main__ + 996
6   libsystem_pthread.dylib         0x000000018e7afe18 _pthread_body + 164
7   libsystem_pthread.dylib         0x000000018e7afd70 _pthread_start + 136
8   libsystem_pthread.dylib         0x000000018e7ad550 thread_start + 0

Thread 4 name:  com.apple.CFSocket.private
Thread 4:
0   libsystem_kernel.dylib          0x000000018e72e76c __select + 8
1   libsystem_pthread.dylib         0x000000018e7afe18 _pthread_body + 164
2   libsystem_pthread.dylib         0x000000018e7afd70 _pthread_start + 136
3   libsystem_pthread.dylib         0x000000018e7ad550 thread_start + 0

Thread 5 name:  Dispatch queue: com.apple.root.high-priority
Thread 5:
0   libsystem_kernel.dylib          0x000000018e72e394 __psynch_cvwait + 8
1   Foundation                      0x00000001821cf8e0 -[__NSOperationInternal _waitUntilFinished:] + 100
2   brandnooz                       0x0000000100083928 0x100038000 + 309544
3   brandnooz                       0x00000001000cf3c0 0x100038000 + 619456
4   libdispatch.dylib               0x000000018e618010 _dispatch_call_block_and_release + 20
5   libdispatch.dylib               0x000000018e617fd0 _dispatch_client_callout + 12
6   libdispatch.dylib               0x000000018e61f2b4 _dispatch_root_queue_drain + 552
7   libdispatch.dylib               0x000000018e61f4f8 _dispatch_worker_thread2 + 72
8   libsystem_pthread.dylib         0x000000018e7ad6b8 _pthread_wqthread + 352
9   libsystem_pthread.dylib         0x000000018e7ad548 start_wqthread + 0

Thread 6 name:  Dispatch queue: com.apple.root.default-priority
Thread 6:
0   libsystem_kernel.dylib          0x000000018e715cdc semaphore_wait_trap + 8
1   brandnooz                       0x00000001000d8044 0x100038000 + 655428
2   libdispatch.dylib               0x000000018e618010 _dispatch_call_block_and_release + 20
3   libdispatch.dylib               0x000000018e617fd0 _dispatch_client_callout + 12
4   libdispatch.dylib               0x000000018e61f2b4 _dispatch_root_queue_drain + 552
5   libdispatch.dylib               0x000000018e61f4f8 _dispatch_worker_thread2 + 72
6   libsystem_pthread.dylib         0x000000018e7ad6b8 _pthread_wqthread + 352
7   libsystem_pthread.dylib         0x000000018e7ad548 start_wqthread + 0

Thread 7 name:  Dispatch queue: com.apple.root.high-priority
Thread 7:
0   libsystem_kernel.dylib          0x000000018e72e394 __psynch_cvwait + 8
1   Foundation                      0x00000001821cf8e0 -[__NSOperationInternal _waitUntilFinished:] + 100
2   brandnooz                       0x0000000100083928 0x100038000 + 309544
3   brandnooz                       0x00000001000cf3c0 0x100038000 + 619456
4   libdispatch.dylib               0x000000018e618010 _dispatch_call_block_and_release + 20
5   libdispatch.dylib               0x000000018e617fd0 _dispatch_client_callout + 12
6   libdispatch.dylib               0x000000018e61f2b4 _dispatch_root_queue_drain + 552
7   libdispatch.dylib               0x000000018e61f4f8 _dispatch_worker_thread2 + 72
8   libsystem_pthread.dylib         0x000000018e7ad6b8 _pthread_wqthread + 352
9   libsystem_pthread.dylib         0x000000018e7ad548 start_wqthread + 0

Thread 8 name:  Dispatch queue: com.apple.root.default-priority
Thread 8:
0   libsystem_kernel.dylib          0x000000018e715cdc semaphore_wait_trap + 8
1   brandnooz                       0x00000001000d8044 0x100038000 + 655428
2   libdispatch.dylib               0x000000018e618010 _dispatch_call_block_and_release + 20
3   libdispatch.dylib               0x000000018e617fd0 _dispatch_client_callout + 12
4   libdispatch.dylib               0x000000018e61f2b4 _dispatch_root_queue_drain + 552
5   libdispatch.dylib               0x000000018e61f4f8 _dispatch_worker_thread2 + 72
6   libsystem_pthread.dylib         0x000000018e7ad6b8 _pthread_wqthread + 352
7   libsystem_pthread.dylib         0x000000018e7ad548 start_wqthread + 0

Thread 9 name:  Dispatch queue: com.apple.network.helper_queue
Thread 9:
0   libsystem_kernel.dylib          0x000000018e715ca0 mach_msg_trap + 8
1   libdispatch.dylib               0x000000018e621648 _dispatch_mach_msg_send + 364
2   libdispatch.dylib               0x000000018e61a6d4 dispatch_mach_send + 216
3   libxpc.dylib                    0x000000018e7c9814 xpc_connection_send_message_with_reply + 124
4   libsystem_network.dylib         0x000000018e77cfe0 __net_helper_send_block_invoke + 48
5   libdispatch.dylib               0x000000018e617fd0 _dispatch_client_callout + 12
6   libdispatch.dylib               0x000000018e61dc80 _dispatch_barrier_sync_f_invoke + 44
7   libsystem_network.dylib         0x000000018e77ab84 net_helper_send + 212
8   libsystem_network.dylib         0x000000018e77bd4c net_helper_connection_start + 264
9   libsystem_network.dylib         0x000000018e778b78 tcp_connection_register_reachability + 164
10  libsystem_network.dylib         0x000000018e77775c __tcp_connection_start_block_invoke + 312
11  libdispatch.dylib               0x000000018e618010 _dispatch_call_block_and_release + 20
12  libdispatch.dylib               0x000000018e617fd0 _dispatch_client_callout + 12
13  libdispatch.dylib               0x000000018e61e4a4 _dispatch_queue_drain + 636
14  libdispatch.dylib               0x000000018e61a4bc _dispatch_queue_invoke + 64
15  libdispatch.dylib               0x000000018e61f0f0 _dispatch_root_queue_drain + 100
16  libdispatch.dylib               0x000000018e61f4f8 _dispatch_worker_thread2 + 72
17  libsystem_pthread.dylib         0x000000018e7ad6b8 _pthread_wqthread + 352
18  libsystem_pthread.dylib         0x000000018e7ad548 start_wqthread + 0

Thread 10:
0   libsystem_kernel.dylib          0x000000018e72ee74 __workq_kernreturn + 8
1   libsystem_pthread.dylib         0x000000018e7ad548 start_wqthread + 0

Thread 0 crashed with ARM Thread State (64-bit):
    x0: 0x0000000000000008   x1: 0x0000000184d29a89   x2: 0x0000000000000000   x3: 0x0000000000000000
    x4: 0x0000000000000000   x5: 0x0000000000000000   x6: 0x0000000000000000   x7: 0x0000000000000000
    x8: 0x000000018f24b4b8   x9: 0x0000000100183460  x10: 0x0000000150882c00  x11: 0x000000520000007f
   x12: 0x0000000150883390  x13: 0x000001a500183465  x14: 0x0000000000000006  x15: 0x0000000000000000
   x16: 0x000000018e0501c0  x17: 0x00000001846484ec  x18: 0x0000000000000000  x19: 0x0000000170053500
   x20: 0x000000018f287000  x21: 0x000000016fdc6b28  x22: 0x000000016fdc6b20  x23: 0x000000017012d3e0
   x24: 0x000000017012d3f0  x25: 0x000000019157a098  x26: 0x000000016fdc6b20  x27: 0x000000016fdc6d00
   x28: 0x0000000000000003  fp: 0x000000016fdc6af0   lr: 0x000000018493e944
    sp: 0x000000016fdc6ae0   pc: 0x000000018e0501c8 cpsr: 0x20000000

请帮我解决这个问题。在此先感谢

Answer 1

您在objc_msgSend内崩溃，但EXC_BAD_ACCESS例外。根据我的经验，这可能意味着一个对象已经超出了范围并且您正在尝试访问它，或者该对象应该在另一个线程上执行某些操作并且同时（当它正在执行此操作时）），它超出了原始线程的范围。

如果你正在使用Apple的多线程对象之一（几乎任何带有委托回调的东西），请确保它被包含在其中的对象保留（strong - ly）。例如，如果您正在使用具有异步回调的对象，则无法在方法中对其进行实例化，然后让它消失，您必须将其设为strong @property以使其保持在范围内当方法返回并且您正在等待回调时。

编辑（基于CFSocket线程）：

从表面上看，您使用的是通常与NSStream类一起使用的套接字API。请记住为那些@properties对象（或您正在使用的其他连接对象）创建强大的NSStream，如果您要将它们包装到另一个对象中，请确保 it 是使用它的任何对象的strong @property。您无法从创建它的线程中的对象获得异步回调。

（请注意，这不仅仅是一个已设置为nil的对象的消息传递。到nil的消息不会崩溃，他们只返回nil。问题是消息被发送到你不再拥有的内存中。）

编辑2（基于主线程）：

您确定拥有View Controller转换中使用的每个对象吗？在块或异步操作中创建临时对象也可能导致EXC_BAD_ACCESS。

Answer 2

从它看起来，可能是两个线程正在访问相同的变量，其中一个线程正在破坏另一个中使用的变量。这是一个同步问题。访问不当主要意味着您正在访问一个nil

的变量

您可以在应用程序中集成www.crashlytics.com等崩溃报告工具。它非常易于实现，下载sdk后即可获得文档。实施后，彻底测试您的应用程序，它会告诉您代码崩溃的确切行，您可以解决它。

Apple因崩溃而拒绝了我的应用程序，无法重现它

2 个答案: