如何获得详细的iOS异常消息

Question

如何获得如下所示的详细iOS异常描述(我已经看到一些人引用了这样的描述):

CALayer position contains NaN: [2.74665e-34 NaN]2012-04-05 15:48:00.185感染[28198:fb03] (

0   CoreFoundation                      0x0226803e __exceptionPreprocess + 206
1   libobjc.A.dylib                     0x02820cd6 objc_exception_throw + 44
2   CoreFoundation                      0x02210a48 +[NSException raise:format:arguments:] 
3   CoreFoundation                      0x022109b9 +[NSException raise:format:] + 57
4   QuartzCore                          0x00df3c0d _ZN2CA5Layer12set_positionERKNS
5   QuartzCore                          0x00de9f55 -[CALayer setPosition:] + 68
6   QuartzCore                          0x00de9a0a -[CALayer setFrame:] + 675
7   UIKit                               0x00efbfb8 -[UIView(Geometry) setFrame:] + 198
8   UIKit                               0x010071a1 -[UILabel setFrame:] + 233

…

Answer 1

在xcode中添加一个异常断点，和/或使用自定义异常处理程序

http://developer.apple.com/library/ios/ipad/菜谱/xcode_help-breakpoint_navigator/文章/adding_an_exception_breakpoint.html

和

如何实现全局iPhone异常处理?