作为 obj-c 的新手，我不擅长阅读堆栈跟踪，但我通常可以找出代码中从哪里开始查找。但是，在测试期间，其中一名测试人员始终报告数次随机崩溃。而且我无法确定堆栈跟踪的头部或尾部，因为它们不指向我自己的任何代码。这里有两个：
0 WIT Free 0x000a5a92 _mh_execute_header + 338578
1 WIT Free 0x000a677c _mh_execute_header + 341884
2 libsystem_c.dylib 0x355cc7ec _sigtramp + 48
3 WIT Free 0x000fcd02 _mh_execute_header + 695554
4 WIT Free 0x000fd502 _mh_execute_header + 697602
5 WIT Free 0x000fd0a0 _mh_execute_header + 696480
6 WIT Free 0x000fea9c _mh_execute_header + 703132
7 WIT Free 0x000ffa3a _mh_execute_header + 707130
8 Foundation 0x31e1bc28 __65-[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:]_block_invoke_0 + 16
9 Foundation 0x31d736d8 -[NSURLConnectionInternalConnection invokeForDelegate:] + 28
10 Foundation 0x31d736a2 -[NSURLConnectionInternal _withConnectionAndDelegate:onlyActive:] + 198
11 Foundation 0x31d735c4 -[NSURLConnectionInternal _withActiveConnectionAndDelegate:] + 60
12 CFNetwork 0x34c6c7f4 _ZN19URLConnectionClient23_clientDidFinishLoadingEPNS_26ClientConnectionEventQueueE + 192
13 CFNetwork 0x34c614a4 _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 424
14 CFNetwork 0x34c61598 _ZN19URLConnectionClient26ClientConnectionEventQueue33processAllEventsAndConsumePayloadEP20XConnectionEventInfoI12XClientEvent18XClientEventParamsEl + 668
15 CFNetwork 0x34c611a2 _ZN19URLConnectionClient13processEventsEv + 106
16 CFNetwork 0x34c610d8 _ZN17MultiplexerSource7performEv + 156
17 CoreFoundation 0x314b1ad2 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 14
18 CoreFoundation 0x314b129e __CFRunLoopDoSources0 + 214
19 CoreFoundation 0x314b0044 __CFRunLoopRun + 652
20 CoreFoundation 0x314334a4 CFRunLoopRunSpecific + 300
21 CoreFoundation 0x3143336c CFRunLoopRunInMode + 104
22 GraphicsServices 0x334ad438 GSEventRunModal + 136
23 UIKit 0x30b96cd4 UIApplicationMain + 1080
24 WIT Free 0x000558b0 _mh_execute_header + 10416
25 WIT Free 0x00055857 _mh_execute_header + 10327
和：
0 WIT Free 0x00067a92 _mh_execute_header + 338578
1 WIT Free 0x0006877c _mh_execute_header + 341884
2 libsystem_c.dylib 0x355cc7ec _sigtramp + 48
3 WIT Free 0x000bfc82 _mh_execute_header + 699522
4 WIT Free 0x000cc34e _mh_execute_header + 750414
5 WIT Free 0x000cd5a0 _mh_execute_header + 755104
6 libdispatch.dylib 0x35cf5c58 _dispatch_call_block_and_release + 12
7 libdispatch.dylib 0x35d00e90 _dispatch_main_queue_callback_4CF$VARIANT$up + 196
8 CoreFoundation 0x314b02ac __CFRunLoopRun + 1268
9 CoreFoundation 0x314334a4 CFRunLoopRunSpecific + 300
10 CoreFoundation 0x3143336c CFRunLoopRunInMode + 104
11 GraphicsServices 0x334ad438 GSEventRunModal + 136
12 UIKit 0x30b96cd4 UIApplicationMain + 1080
13 WIT Free 0x000178b0 _mh_execute_header + 10416
14 WIT Free 0x00017857 _mh_execute_header + 10327
有人可以破译这个并用简单的英语解释我所看到的吗？一些关于为什么会发生这些崩溃的指针也将非常有帮助！
编辑：更多信息
- 显然，崩溃几乎总是发生在相当弱的网络连接上。
- 我正在使用带有委托的异步 NSURLConnections
- 我将尝试使用 PLCrashReporter 获取所有线程的堆栈跟踪
- 我正在使用 ARC
- 跟踪的前三行对于每次崩溃都是通用的（十六进制数字除外 - 内存位置？）：
：
0 WIT Free 0x000a5a92 _mh_execute_header + 338578
1 WIT Free 0x000a677c _mh_execute_header + 341884
2 libsystem_c.dylib 0x355cc7ec _sigtramp + 48
谢谢