ios里如何进行异常捕捉

关于异常捕捉，底层方法里已有实现，在appdelegate里实现代码：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

//捕获异常
NSSetUncaughtExceptionHandler(&uncaughtExceptionHandler);

return YES；

}

//  exception 异常信息
void uncaughtExceptionHandler(NSException *exception)

{
    NSLog(@"CRASH: %@", exception);
    NSLog(@"Stack Trace: %@", [exception callStackSymbols]);
    // Internal error reporting
}