ios - 在iOS中的UIView上连续按下手势

Question

有什么方法可以让用户连续按下UIView来得到通知吗？即我一直用一根手指按UIView，并且我想在此期间一次又一次地继续调用特定方法。

我尝试过UILongPressGestureRecognizer，但它只是通知开始，结束，移动等。与TouchesBegan相同。

干杯

Answer 1

您可以做的是，使用UILongPressGestureRecognizer和NSTimer的组合功能。

以下代码应满足您的要求。

@property (strong, nonatomic) NSTimer *timer;

- (void) viewDidLoad

{

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

   [aView addGestureRecognizer: longPress];

}

- (void) longPress:(UILongPressGestureRecognizer*)gesture

{

      if ( gesture.state == UIGestureRecognizerStateBegan ) 

  {

        self.timer=[NSTimer scheduledTimerWithTimeInterval:1.0f target:self selector:@selector(callMethod) userInfo:nil repeats:YES];

        [self.timer fire];

 }
    if ( gesture.state == UIGestureRecognizerStateEnded )

    {

            [self.timer invalidate];

 }

}

- (void) callMethod

{

   //will be called continuously within certain time interval you have set

}