是否有一些方法可以在Xcode 4.6中了解崩溃原因？
The crash stack is :
Exception Type: SIGSEGV
Exception Codes: SEGV_ACCERR at 0xd9f2c061
Crashed Thread: 0
Thread 0 Crashed:
0 libobjc.A.dylib 0x3a74f5aa objc_msgSend + 10
1 Foundation 0x33157599 -[NSNotificationCenter postNotificationName:object:userInfo:] + 73
2 UIKit 0x347830cd -[UIApplication _handleApplicationSuspend:eventInfo:] + 733
3 UIKit 0x346f91e7 -[UIApplication handleEvent:withNewEvent:] + 2459
4 UIKit 0x346f86cd -[UIApplication sendEvent:] + 73
5 UIKit 0x346f811b _UIApplicationHandleEvent + 6155
6 GraphicsServices 0x363ee5a3 _PurpleEventCallback + 591