NSAssert没有堆栈跟踪

Question

IIRC,这通常有效.但是最近我注意到这NSAssert…()并没有给我堆栈跟踪,或者至少没有用处:

2012-02-26 14:41:19.283 MyApp[3299:707] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '…'
*** First throw call stack:
(0x33cc58bf 0x353e11e5 0x33cc57b9 0x317583b3 0x78423 0x76e35 0x77dbf 0x217dd 0x12c63 0x3178a943 0x33c99a63 0x33c996c9 0x33c9829f 0x33c1b4dd 0x33c1b3a5 0x3585bfcd 0x34d60743 0xde87 0x30dc)
terminate called throwing an exception(gdb) bt
#0  0x3629232c in __pthread_kill ()
#1  0x34b3ef5a in pthread_kill ()
#2  0x34b37fea in abort ()
#3  0x35fe9f6a in abort_message ()
#4  0x35fe734c in default_terminate ()
#5  0x353e12e2 in _objc_terminate ()
#6  0x35fe73c4 in safe_handler_caller ()
#7  0x35fe7450 in std::terminate ()
#8  0x35fe8824 in __cxa_rethrow ()
#9  0x353e1234 in objc_exception_rethrow ()
#10 0x33c1b544 in CFRunLoopRunSpecific ()
#11 0x33c1b3a4 in CFRunLoopRunInMode ()
#12 0x3585bfcc in GSEventRunModal ()
#13 0x34d60742 in UIApplicationMain ()
#14 0x0000de86 in main (argc=1, argv=0x2fdffaa4) at …/main.mm:18
(gdb) 

我在某处读到使用Xcode没有符号的iOS部署目标导致这种情况,我确实最近将设置从4.0更改为4.3.然而,改回来没有任何区别.

OTOH,assert(…)按预期工作.

为什么Xcode在NSAssert…()失败时不能提供正确的可导航堆栈跟踪？

Answer 1

我不确定为什么会这样,但是,如果你设置了一个异常断点,断点似乎会提前停止执行以查看有用的回溯.一旦bt控制台中的断点被按预期工作.

确保不要选中"评估后自动继续"框.这似乎会导致像你发布的那样无用的回溯.

您还可以使用此处NSSetUncaughtExceptionHandler()所述设置日志回调函数.