UILongPressGestureRecognizer问题

Question

我有一个关于UILongPressGestureRecognizer的问题，我添加了代码下面的手势

**ViewDidLoad**
UILongPressGestureRecognizer *_longRecognizer = [[UILongPressGestureRecognizer alloc]      initWithTarget:self action:@selector(ICN_TRASH_Click:)]; 
NSArray *recognizerArray = [[NSArray alloc] initWithObjects:_longRecognizer, nil];

[[self.view viewWithTag:2001] setGestureRecognizers:recognizerArray];

 OnClick
 if ([sender isKindOfClass:[UILongPressGestureRecognizer class]])  
{

  UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Warning" message:@"Are you sure delete all message ?" delegate:self cancelButtonTitle:@"Yes" otherButtonTitles:@"No",nil];
  [alert show];
  [alert release];

}

所以我们长按两次按钮调用alertview， 有没有人有一个想法，为什么要面对这个问题。

Answer 1

所以你按下按钮（然后我猜它就释放了）你得到了两次消息？

也许您应该检查GestureRecognizer的状态（如果它是开始阶段或结束阶段）GestureRecognizer state。