第二天:Swift手势操控弹性按钮

　　参考链接:https://www.jianshu.com/p/f080ede0f3a8

　　　　　　　　　　　　　　　　　　　　　　　　 

import UIKit

fileprivate let buttonH: CGFloat = 200

class ViewController: UIViewController, UIGestureRecognizerDelegate {

    @IBOutlet weak var segmentControl: UISegmentedControl!
    var randomBtn: UIButton!
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        
        setupUI()
    }

    
    @IBAction func segmentedControlAction(_ sender: UISegmentedControl) {
        
        switch sender.selectedSegmentIndex {
        case 0:
            randomBtn.backgroundColor = UIColor.red
        case 1:
            randomBtn.backgroundColor = UIColor.green
        case 2:
            randomBtn.backgroundColor = UIColor.blue
        case 3:
            randomBtn.backgroundColor = UIColor.randomColor()
        default:
            randomBtn.backgroundColor = UIColor.yellow
        }
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
    

    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destinationViewController.
        // Pass the selected object to the new view controller.
    }
    */

}

extension ViewController {
    func setupUI() {
        // 添加背景色
        let backgroundLayer = CAGradientLayer()
        backgroundLayer.colors = [UIColor.yellow.cgColor, UIColor.white.cgColor]
        backgroundLayer.startPoint = CGPoint(x: 0.5, y: 0)
        backgroundLayer.endPoint = CGPoint(x: 0.5, y: 1)
        backgroundLayer.frame = self.view.bounds
        self.view.layer.addSublayer(backgroundLayer)
        
        self.view.bringSubview(toFront: segmentControl)
        
        // 添加 button
        self.randomBtn = UIButton()
        randomBtn.frame.size = CGSize(width: buttonH, height: buttonH)
        randomBtn.backgroundColor = UIColor.red
        randomBtn.center = self.view.center
        randomBtn.setTitle("MineCode", for: .normal)
        randomBtn.layer.cornerRadius = buttonH / 2
        randomBtn.titleLabel?.font = UIFont.systemFont(ofSize: 24)
        randomBtn.titleLabel?.textColor = UIColor.white
        self.view.addSubview(randomBtn)
        
        addGesture()
    }
    
    func addGesture() {
        
        let singleTapGes = UITapGestureRecognizer(target: self, action:#selector(signleTapAction(_ :)))
        singleTapGes.numberOfTapsRequired = 1
        self.randomBtn.addGestureRecognizer(singleTapGes)
        
        let longPressGes = UILongPressGestureRecognizer(target: self, action:#selector(longPressAction(_ :)))
        longPressGes.allowableMovement = 10
        longPressGes.minimumPressDuration = 1
        self.randomBtn.addGestureRecognizer(longPressGes)
        
        let panGes = UIPanGestureRecognizer(target: self, action:#selector(panGesAction(_ :)))
        panGes.minimumNumberOfTouches = 1
        panGes.maximumNumberOfTouches = 1
        self.randomBtn.addGestureRecognizer(panGes)
        
        let pinchGes = UIPinchGestureRecognizer(target: self, action:#selector(pinchAction(_ :)))
        pinchGes.delegate = self
        self.randomBtn.addGestureRecognizer(pinchGes)
        
        let rotationGes = UIRotationGestureRecognizer(target: self, action:#selector(rotationAction(_ :)))
        rotationGes.delegate = self
        self.randomBtn.addGestureRecognizer(rotationGes)
    }
}

extension ViewController {
    @objc func signleTapAction(_ tap: UITapGestureRecognizer) {
        
        print("Tap click...")
        
        let animation = CABasicAnimation(keyPath: "transform.rotation.z")
        
        animation.duration = 0.08
        animation.repeatCount = 4
        animation.fromValue = (-M_1_PI)
        animation.toValue = (M_1_PI)
        animation.autoreverses = true
        self.randomBtn.layer.anchorPoint = CGPoint(x: 0.5, y: 0.5)
        self.randomBtn.layer.add(animation, forKey: "rotation.z")
    }
    
    @objc func longPressAction(_ longGes: UILongPressGestureRecognizer) {
        
        print("Long Start...")
        
        let animation = CAKeyframeAnimation(keyPath: "transform.translation.x")
        
        animation.duration = 0.08
        animation.repeatCount = 2
        
        animation.values = [0, -self.randomBtn.frame.width / 4, self.randomBtn.frame.width / 4, 0]
        animation.autoreverses = true
        self.randomBtn.layer.anchorPoint = CGPoint(x: 0.5, y: 0.5)
        self.randomBtn.layer.add(animation, forKey: "rotation.x")
    }
    
    @objc func panGesAction(_ panGes: UIPanGestureRecognizer) {
        
        print("Pan Start")
        
        let movePoint = panGes.translation(in: self.view)
        var curPoint = self.randomBtn.center
        curPoint.x += movePoint.x
        curPoint.y += movePoint.y
        self.randomBtn.center = curPoint
        
        panGes.setTranslation(CGPoint.zero, in: self.view)
    }
    
    @objc func pinchAction(_ pinch: UIPinchGestureRecognizer) {
        
        print("PinchAction start")
        
        let pinchScale = pinch.scale
        self.randomBtn.transform = self.randomBtn.transform.scaledBy(x: pinchScale, y: pinchScale)
        
        pinch.scale = 1.0
    }
    
    @objc func rotationAction(_ rotation: UIRotationGestureRecognizer) {
        
        print(("rotation Start"))
        
        let rotationR = rotation.rotation
        self.randomBtn.transform = self.randomBtn.transform.rotated(by: rotationR)
        
        rotation.rotation = 0.0
    }
    
    func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool {
        return true
    }
}

extension UIColor {
    convenience init(r: CGFloat, g: CGFloat, b: CGFloat) {
        self.init(red: r / 255.0, green: g / 255.0, blue: b / 255.0, alpha: 1.0)
    }
    
    class func randomColor() -> UIColor {
        return UIColor(r: CGFloat(arc4random_uniform(256)), g: CGFloat(arc4random_uniform(256)), b: CGFloat(arc4random_uniform(256)))
    }
}