拦截iOS系统导航栏返回按钮事件－三种方法

方法一：在dealloc里面书写监听事件，因为只有pop才会调用dealloc，push不会掉用

• (void)dealloc {YLLog(@"123"); }

方法二：在- (void)viewWillDisappear:(BOOL)animated中调用

• (void)viewWillDisappear:(BOOL)animated{

if ([self.navigationController.viewControllers indexOfObject:self]==NSNotFound) {

NSLog(@"clicked navigationbar back button");

}

}

方法三：重写返回按钮，然后调用返回按钮的方法即可：如

• (void)popViewcontrollerFunc {

UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"" message:@"确定要放弃到手的奖品吗" delegate:self cancelButtonTitle:@"点错啦" otherButtonTitles:@"狠心放弃", nil];alert.tag = 10001;[alert show];

}