UIGestureRecognizer手势-优快云博客

本文深入讲解Swift中实现的六种常见手势识别：滑动、轻点、捏合、旋转、拖拽和长按。每种手势都附带了详细的代码示例和事件处理方法，帮助开发者快速掌握并应用到iOS应用开发中。

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常用手势: 滑动,轻点,捏合,旋转,拖拽,长按

1.滑动(快速滑动)

let swipeUp = UISwipeGestureRecognizer(target: self, action: Selector("swipe:"))
swipeUp.direction = UISwipeGestureRecognizerDirection.Up
self.view.addGestureRecognizer(swipeUp)

let swipeDown = UISwipeGestureRecognizer(target: self, action: Selector("swipe:"))
swipeDown.direction = UISwipeGestureRecognizerDirection.Down
self.view.addGestureRecognizer(swipeDown)

let swipeLeft = UISwipeGestureRecognizer(target: self, action: Selector("swipe:"))
swipeLeft.direction = UISwipeGestureRecognizerDirection.Left
self.view.addGestureRecognizer(swipeLeft)

let swipeRight = UISwipeGestureRecognizer(target: self, action: Selector("swipe:"))
swipeRight.direction = UISwipeGestureRecognizerDirection.Right
self.view.addGestureRecognizer(swipeRight)

获取手势事件

func swipe(recognizer:UISwipeGestureRecognizer){
    if recognizer.direction == UISwipeGestureRecognizerDirection.Up{
        print("向左滑动")
    }else if recognizer.direction == UISwipeGestureRecognizerDirection.Left{
        print("向左滑动")
    }
    
    let point = recognizer.locationInView(self.view)
    print(point.x,point.y)
}

2.轻点手势(点击)

//单击监听
let tapSingle = UITapGestureRecognizer(target: self, action: Selector("tapSingleDid"))
tapSingle.numberOfTapsRequired = 1//点按的次数
tapSingle.numberOfTouchesRequired = 1//点按的手指数
//双击监听
let tapDouble = UITapGestureRecognizer(target: self, action: Selector("tapDoubleDid:"))
tapDouble.numberOfTapsRequired = 2
tapDouble.numberOfTouchesRequired = 1
self.view.addGestureRecognizer(tapSingle)
self.view.addGestureRecognizer(tapDouble)

//先检测是否为双击,当确定不是双击之后再执行单击
tapSingle.requireGestureRecognizerToFail(tapDouble)

点击事件

  func tapSingleDid(){
        print("单击")
    }
    
    func tapDoubleDid(sender: UITapGestureRecognizer){
        if sender.view == self.view{
            print("双击")
        }
    }

3.捏合手势

let pinch = UIPinchGestureRecognizer(target: self, action: Selector("pinchDid:"))
self.view.addGestureRecognizer(pinch)

事件

func pinchDid(pinch:UIPinchGestureRecognizer){
    print(pinch.scale)//捏合比例
}

4.旋转手势

let rotation = UIRotationGestureRecognizer(target: self, action: Selector("rotationDid:"))
self.view.addGestureRecognizer(rotation)

事件

func rotationDid(recognizer:UIRotationGestureRecognizer){
    print(recognizer.rotation*(180/CGFloat(M_PI)))//转成常用度数了
}

5.拖动手势

var panV : UIView!
panV = UIView(frame: CGRectMake(0, 0, 100, 100))
panV.center = self.view.center
panV.backgroundColor = UIColor.redColor()
self.view.addSubview(panV)

let pan = UIPanGestureRecognizer(target: self, action: Selector("panDid:"))
panV.addGestureRecognizer(pan)

事件

func panDid(recognizer:UIPanGestureRecognizer){
    let point = recognizer.locationInView(self.view)
    panV.center = point
}

6.长按手势

let long = UILongPressGestureRecognizer(target: self, action: Selector("longDid:"))
self.view.addGestureRecognizer(long)

事件

func longDid(recognizer:UILongPressGestureRecognizer){
    if recognizer.state == .Began{//由于长按会执行多次,所以需要判断手势状态
        print("长按手势触发")
    }
    
}

来源: http://www.cnblogs.com/spaceID/p/4977559.html

转载于:https://www.cnblogs.com/spaceID/p/4977559.html