UILongPressGestureRecognizer

Question

我想创建一个应用程序，在UILongPressGestureRecognizer手势被触发时可以拖放UIButton。

我：

UIGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] 
initWithTarget:self action:@selector(handleLongPress:)]; 

而且

- (void)handleLongPress:(UILongPressGestureRecognizer *)recognizer { 
    CGPoint location = [recognizer locationInView:self.view]; 

    switch (recognizer.state) { 
     case UIGestureRecognizerStateBegan: 
      //NSLog(@"handleLongPress: StateBegan"); 
      break; 
     case UIGestureRecognizerStateChanged: 
      if(location.y > 75.0 && location.x > 25 && location.x < 300) 
       button.frame = CGRectMake(location.x-25, location.y-15, 50, 30);   
      break; 
     case UIGestureRecognizerStateEnded: 
      //NSLog(@"handleLongPress: StateEnded"); 
      break; 
     default: 
      break; 
    } 
} 

这一个按钮（即伊娃button）的伟大工程。我怎样才能向handleLongPress函数发送正在按下的当前按钮？换句话说，我愿做类似下面，我在sender

- (void)handleLongPress:(UILongPressGestureRecognizer *)recognizer:(id)sender { 
    CGPoint location = [recognizer locationInView:self.view]; 

    switch (recognizer.state) { 
     case UIGestureRecognizerStateBegan: 
      //NSLog(@"handleLongPress: StateBegan"); 
      break; 
     case UIGestureRecognizerStateChanged: 
      if(location.y > 75.0 && location.x > 25 && location.x < 300) 
       sender.frame = CGRectMake(location.x-25, location.y-15, 50, 30);   
      break; 
     case UIGestureRecognizerStateEnded: 
      //NSLog(@"handleLongPress: StateEnded"); 
      break; 
     default: 
      break; 
    } 
} 

Answer 1

你试过recognizer.view？

Answer 2

通过你会通过你所有的按钮进入handleLongPress必须循环。 使用locationInView和pointInside：withEvent：确定哪个按钮在按下的手指下。