我的应用程序偶尔崩溃
2012-10-10 23:19:24.039 [26442:850f] -[NSNull allKeys]: unrecognized selector sent to instance 0x7fff741cbea0
2012-10-10 23:19:24.040 [26442:850f] *** Terminating app due to uncaught exception of class 'nil'
[obj isKindOfClass:[NSDictionary class]]
该对象在调用之前已经过测试allKeys:
如果我[[NSNull null] allKeys]
故意打电话,它会崩溃
2012-10-11 16:22:15.606 [14939:403] -[NSNull allKeys]: unrecognized selector sent to instance 0x7fff73659f00
2012-10-11 16:22:15.622 [14939:403] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSNull allKeys]: unrecognized selector sent to instance 0x7fff73659f00'
我想知道是什么情况导致的Terminating app due to uncaught exception of class 'nil'
,所以我可以调试这个问题。