ios - UITapGestureRecognizer - 让它在触地时工作，而不是触地？

Question

我使用点击事件对时间非常敏感，所以我很好奇是否可以在用户简单地触摸时激活 UITapGestureRecognizer，而不是要求他们也触摸？

Answer 1

使用 UILongPressGestureRecognizer 并将其 minimumPressDuration 设置为 0。它会在 UIGestureRecognizerStateBegan 状态期间起到触地的作用。

对于 Swift 4+

func setupTap() {
    let touchDown = UILongPressGestureRecognizer(target:self, action: #selector(didTouchDown))
    touchDown.minimumPressDuration = 0
    view.addGestureRecognizer(touchDown)
}

@objc func didTouchDown(gesture: UILongPressGestureRecognizer) {
    if gesture.state == .began {
        doSomething()
    }
}

对于 Objective-C

-(void)setupLongPress
{
   self.longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(didLongPress:)];
   self.longPress.minimumPressDuration = 0;
   [self.view addGestureRecognizer:self.longPress];
}

-(void)didLongPress:(UILongPressGestureRecognizer *)gesture
{
   if (gesture.state == UIGestureRecognizerStateBegan){
      [self doSomething];
   }
}