小弟请教一个关于cocos2dx中捕获异常的问题

Cocos2d-x
#1

小弟在测一个捕获异常的功能，可是怎么也捕获不到异常,比如throw 0,给空指针赋值,delete 两次指针。代码如下，我是参照网上做的:在- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions函数里调用:

GlobalVar::getInstance()->initException();

s_uncaughtExceptionHandler = NSGetUncaughtExceptionHandler();
NSSetUncaughtExceptionHandler (&UncaughtExceptionHandler);