Swift之手势总结

手势个人笔记，代码简单，不过多赘述。

建立手势只需三步

• 建立和设置手势识别器实例，设置target，action，指定一些属性
• 附加识别器到视图
• 实现action方法

1、首先还是创建一个view

@IBOutlet var view1: UIView!

2、实现手势绑定

//-----------------------手势---------------------------
/**点击手势*/
func tapGestureDemo() {
    //建立手势识别器
    let gesture = UITapGestureRecognizer(target: self, action: "viewTap:")
    //附加识别器到视图
    self.view1.addGestureRecognizer(gesture)
}

/**缩放手势*/
func pinchGestureDemo() {
    //建立手势识别器
    let gesture = UIPinchGestureRecognizer(target: self, action: "viewPinch:")
    //附加识别器到视图
    self.view1.addGestureRecognizer(gesture)
}

/**旋转手势*/
func rotationGestureDemo() {
    //建立手势识别器
    let gesture = UIRotationGestureRecognizer(target: self, action: "viewRotation:")
    //附加识别器到视图
    self.view1.addGestureRecognizer(gesture)
}

/**滑动手势*/
func swipeGestureDemo() {
    //建立手势识别器
    let gesture = UISwipeGestureRecognizer(target: self, action: "viewSwipe:")
    //附加识别器到视图
    self.view1.addGestureRecognizer(gesture)
}

/**平移手势*/
func panGestureDemo() {
    //建立手势识别器
    let gesture = UIPanGestureRecognizer(target: self, action: "viewPan:")
    //附加识别器到视图
    self.view1.addGestureRecognizer(gesture)
}

/**长按手势*/
func LongPressGestureDemo() {
    //建立手势识别器
    let gesture = UILongPressGestureRecognizer(target: self, action: "viewLongPress:")
    //附加识别器到视图
    self.view1.addGestureRecognizer(gesture)
}

/**自定义手势*/
func custonGestureDemo() {
    //建立手势识别器
    let gesture = CustomGestureRecognizer(target: self, action: "viewCustom:")
    //附加识别器到视图
    self.view1.addGestureRecognizer(gesture)
}

//-----------------------手势action事件---------------------------
/**点击事件*/
@IBAction func viewTap(sender: UITapGestureRecognizer) {
    print("clicked...")
}

/**缩放事件*/
func viewPinch(sender: UIPinchGestureRecognizer) {
    print("pinch...")
    let _width = view1.bounds.width
    let _height = view1.bounds.height
    view1.bounds.size = CGSize( _width * sender.scale, height: _height * sender.scale)
}

/**旋转事件*/
func viewRotation(sender: UIRotationGestureRecognizer) {
    view1.transform = CGAffineTransformMakeRotation(sender.rotation)
}

/**滑动事件*/
var offsetX: CGFloat = 0
func viewSwipe(sender: UISwipeGestureRecognizer) {
    if sender.direction == UISwipeGestureRecognizerDirection.Right {
        //每次向右平移20
        offsetX += 20
        view1.transform = CGAffineTransformMakeTranslation(offsetX, 0)
    }
}

/**平移事件*/
func viewPan(sender: UIPanGestureRecognizer) {
    let _transX = sender.translationInView(view1).x
    let _transY = sender.translationInView(view1).y

    view1.transform = CGAffineTransformMakeTranslation(_transX, _transY)
}

/**长按事件*/
func viewLongPress(sender: UILongPressGestureRecognizer) {
    print("long pressed....")
}

func viewCustom(sender: CustomGestureRecognizer) {
    print("custom gesture...")
}

3、最后自定义手势，很简单一个例子，可自由扩展

• 新建一个CustomGestureRecognizer自定义手势类，继承自UIGestureRecognizer
• 切记，引入UIGestureRecognizerSubclass
• 开始实现类容，下面代码实现从左上角滑动到右下角实例

import UIKit
import UIKit.UIGestureRecognizerSubclass

class CustomGestureRecognizer: UIGestureRecognizer {
var leftTop = false
var rightDown = false

override init(target: AnyObject?, action: Selector) {
    super.init(target: target, action: action)
}

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent) {

}

override func touchesMoved(touches: Set<UITouch>, withEvent event: UIEvent) {
    let myTouch = touches.first! as UITouch
    let myLocation = myTouch.locationInView(self.view)
    if myLocation.x < 10 && myLocation.y < 10 {
        leftTop = true
    }

    if (myLocation.x + 10) > self.view?.bounds.width && (myLocation.y + 10) > self.view?.bounds.height {
        rightDown = true
    }

    if leftTop && rightDown {
        self.state = UIGestureRecognizerState.Ended
    }

}

override func touchesEnded(touches: Set<UITouch>, withEvent event: UIEvent) {
    self.reset()
}
}

文／疯狂的米老鼠（简书作者）
原文链接：http://www.jianshu.com/p/6ef6603d035d
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