iOS应用程序崩溃在核心位置回调机制 [英] iOS app crashing in Core Location callback machinery

问题描述

我在分析我的crashlog时遇到问题。 iPhone有时会崩溃，当我点击应用程序图标启动应用程序。应用程序已在后台运行，但未处于活动状态。这是符号化的崩溃日志：

I have problems analyzing my crashlog. The iPhone crashes sometimes, when I click on the app icon to start the app. The app is already "running" in background, but it's not active. This is the symbolized crash log:

Thread 0 Crashed:
0   libobjc.A.dylib     0x33479470 objc_msgSend + 28
1   CoreLocation                    0x3436f68e -[CLLocationManager onClientEvent:supportInfo:] + 98
2   CoreLocation                    0x3436f804 OnClientEvent + 16
3   CoreLocation                    0x3436b522 CLClientInvokeCallback(__CLClient*, CLClientEvent, __CFDictionary const*) + 42
4   CoreLocation                    0x3436cf74 CLClientHandleDaemonDataRegistration(__CLClient*, CLDaemonCommToClientRegistration const*, __CFDictionary const*) + 668
5   CoreLocation                    0x3436d4c8 CLClientHandleDaemonData(__CFMessagePort*, long, __CFData const*, void*) + 212
6   CoreFoundation                  0x33a813fe __CFMessagePortPerform + 242
7   CoreFoundation                  0x33a556f8 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 20
8   CoreFoundation                  0x33a556bc __CFRunLoopDoSource1 + 160
9   CoreFoundation                  0x33a47f76 __CFRunLoopRun + 514
10  CoreFoundation                  0x33a47c80 CFRunLoopRunSpecific + 224
11  CoreFoundation                  0x33a47b88 CFRunLoopRunInMode + 52
12  GraphicsServices                0x33b0e4a4 GSEventRunModal + 108
13  GraphicsServices                0x33b0e550 GSEventRun + 56
14  UIKit   0x32099322 -[UIApplication _run] + 406
15  UIKit                           0x32096e8c UIApplicationMain + 664
16  Norddeich                       0x00002764 main (main.m:14)
17  Norddeich                       0x00002718 start + 32

就我所知的堆栈跟踪，发生在main.m.中的错误。第14行是默认代码的一部分：

As far as i understand the stack trace, the error occurred in the main.m. Line 14 is part of the default code:

int retVal = UIApplicationMain(argc, argv, nil, nil);

请给我一个提示，如何找到错误。

谢谢

Please give me a hint, how to find the error.
Thank you in advance!

推荐答案

在返回之前，您将它设置为 nil 从控制器（或至少在控制器的 dealloc ）？我怀疑CLLocationManager试图发送消息到委托已被释放的代理 - 这就是为什么它崩溃在obj_msgSend。

Do you set it's delegate to nil before returning from controller (or at least in controller's dealloc)? I suspect CLLocationManager is trying to send a message to delegate which is deallocated already - that's why it crashes at obj_msgSend.

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