手势

<li>轻触</li><li>轻扫</li><li>长按</li><li>旋转</li><li>捏合</li><li>平移</li><li>边缘</li>
<h5>轻触</h5>
<pre>
func tapGes() {

    let tapGes = UITapGestureRecognizer(target: self, action: #selector(self.tapAction))
    // 轻触几次
    tapGes.numberOfTapsRequired = 2
    // 几根手指
    tapGes.numberOfTouchesRequired = 2
    testImageView.addGestureRecognizer(tapGes)
    
}

func tapAction() {
    print("轻触")
}

</pre>

<h5>轻扫(多个轻扫方向，需要写不同的手势)</h5>
<pre>

func swipeGes() {
    
    let downSwipeGes = UISwipeGestureRecognizer(target: self, action: #selector(self.swipeAction(ges:)))
    downSwipeGes.direction = .down
    testImageView.addGestureRecognizer(downSwipeGes)
    
    let leftSwipeGes = UISwipeGestureRecognizer(target: self, action: #selector(self.swipeAction(ges:)))
    leftSwipeGes.direction = .left
    testImageView.addGestureRecognizer(leftSwipeGes)
    
}

func swipeAction(ges:UISwipeGestureRecognizer) {

    switch ges.direction {
    case UISwipeGestureRecognizerDirection.up:
        print("向上轻扫")
    case UISwipeGestureRecognizerDirection.down:
        print("向下轻扫")
    case UISwipeGestureRecognizerDirection.left:
        print("向左轻扫")
    case UISwipeGestureRecognizerDirection.right:
        print("向右轻扫")
    default:
        print("其他")
    }
    
}

</pre>

<h5>长按</h5>
<pre>
func longGes() {

    let longPressGes = UILongPressGestureRecognizer(target: self, action: #selector(self.longPressAction))
    testImageView.addGestureRecognizer(longPressGes)
}

func longPressAction() {
    print("长按手势")
}

</pre>

<h5>旋转</h5>
<pre>
func rotationGes() {
let rotationGes = UIRotationGestureRecognizer(target: self, action: #selector(self.rotationGesAction))
testImageView.addGestureRecognizer(rotationGes)
}

func rotationGesAction() {
    print("旋转手势")
}

</pre>

<h5>捏合</h5>
<pre>
func pinchGes() {

    let pinchGes = UIPinchGestureRecognizer(target: self, action: #selector(self.pinchGesAction))
    print("捏合手势----",pinchGes.numberOfTouches)
    testImageView.addGestureRecognizer(pinchGes)
    
}

func pinchGesAction() {
    print("捏合手势")
}

</pre>

<h5>平移</h5>
<pre>
func panGes() {

    let panGes = UIPanGestureRecognizer(target: self, action: #selector(self.panGesAction))
    testImageView.addGestureRecognizer(panGes)
    
}

func panGesAction(){
    print("平移手势")
    print("-------")
}

</pre>

<h5>边缘(需要指定边缘方向，手势才会生效)</h5>
<pre>
func screenGes() {

   let screenGes = UIScreenEdgePanGestureRecognizer(target: self, action: #selector(self.screenGesAction))
    // 需指定边缘方向，手势才会生效
    screenGes.edges = .left
    testImageView.addGestureRecognizer(screenGes)
}

func screenGesAction() {
    print("边缘手势")
}

</pre>