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]; }