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];

}

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转载自blog.csdn.net/wyz670083956/article/details/115491110
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