Swift - UIGestureRecognizer 各种手势

1、点击手势
2、拖动手势
3、长按手势
4、滑动手势
5、捏合手势
6、旋转手势

完整代码

import UIKit

class ViewController: UIViewController
{
    
    var imageView: UIImageView!

    override func viewDidLoad()
    {
        super.viewDidLoad()
        
        imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 300, height: 300))
        imageView.center = self.view.center
        imageView.image = #imageLiteral(resourceName: "arrows")
        imageView.isUserInteractionEnabled = true
        self.view.addSubview(imageView)
        
        
        // MARK: 拖动手势
        let pan = UIPanGestureRecognizer(target: self, action: #selector(ViewController.didPan(pan:)))
        pan.maximumNumberOfTouches = 1
        imageView.addGestureRecognizer(pan)
        
        
        // MARK: 长按手势
        let longPress = UILongPressGestureRecognizer(target: self, action: #selector(ViewController.longPress(longPress:)))
        imageView.addGestureRecognizer(longPress)

        
        // MARK: 点击手势
        // 单击
        let tapOne = UITapGestureRecognizer(target: self, action: #selector(ViewController.tapOne))
        imageView.addGestureRecognizer(tapOne)
        
        // 双击
        let tapDouble = UITapGestureRecognizer(target: self, action: #selector(ViewController.tapDouble))
        tapDouble.numberOfTapsRequired = 2
        imageView.addGestureRecognizer(tapDouble)
        
        // 声明单击事件需要双击事件检测失败后才会执行
        tapOne.require(toFail: tapDouble)
        
        
        // MARK: 滑动手势
        // 上滑
        let swipeUp = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.swipeGesture(swipe:)))
        swipeUp.direction = .up
        self.view.addGestureRecognizer(swipeUp)
        
        // 下滑
        let swipeDown = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.swipeGesture(swipe:)))
        swipeDown.direction = .down
        self.view.addGestureRecognizer(swipeDown)
        
        // 左滑
        let swipeLeft = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.swipeGesture(swipe:)))
        swipeLeft.direction = .left
        self.view.addGestureRecognizer(swipeLeft)
        
        // 右滑
        let swipeRight = UISwipeGestureRecognizer(target: self, action: #selector(ViewController.swipeGesture(swipe:)))
        swipeRight.direction = .right
        self.view.addGestureRecognizer(swipeRight)
        
        
        // MARK: 捏合手势
        let pinch = UIPinchGestureRecognizer(target: self, action: #selector(ViewController.didPinch(pinch:)))
        imageView.addGestureRecognizer(pinch)
        
        
        // MARK: 旋转手势
        let rotation = UIRotationGestureRecognizer(target: self, action: #selector(ViewController.didRotation(rotation:)))
        imageView.addGestureRecognizer(rotation)
 
    }
    
    func didRotation(rotation: UIRotationGestureRecognizer)
    {
        print("旋转的角度:\(rotation.rotation*(180/(CGFloat(Double.pi))))")
        imageView.transform = CGAffineTransform(rotationAngle: rotation.rotation)
    }
    
    func didPinch(pinch: UIPinchGestureRecognizer)
    {
        print("捏合比例:\(pinch.scale)")
        print("捏合速度:\(pinch.velocity)")
        
        imageView.transform = CGAffineTransform(scaleX: pinch.scale, y: pinch.scale)
    }
    
    func swipeGesture(swipe: UISwipeGestureRecognizer)
    {
        switch swipe.direction
        {
        case UISwipeGestureRecognizerDirection.up:
            print("向上滑动")
        case UISwipeGestureRecognizerDirection.down:
            print("向下滑动")
        case UISwipeGestureRecognizerDirection.left:
            print("向左滑动")
        case UISwipeGestureRecognizerDirection.right:
            print("向右滑动")
        default:
            print("不明滑动")
        }
    }
    
    func tapOne()
    {
        print("单击")
    }
    
    func tapDouble()
    {
        print("双击")
    }
    
    func longPress(longPress: UILongPressGestureRecognizer)
    {
        if longPress.state == .began
        {
            print("长按开始")
        }
        else
        {
            print("长按结束")
        }
    }
    
    func didPan(pan: UIPanGestureRecognizer)
    {
        let point = pan.location(in: self.view)
        imageView.center = point
    }

    override func didReceiveMemoryWarning()
    {
        super.didReceiveMemoryWarning()
    }
}