GestureRecognizer会取消掉Touch的生命周期

Gesture和Touch的互相影响

在beginTracking和touchesBegan中我们讨论了，UIControl和UIView对于Touch的不同追踪阶段

当UIView存在GestrueRecognize时，GesuteRecoginzer的 cancelsTouchesInView属性会在手势被正确识别后中断追踪

public class TouchControl: UIControl {

    convenience public init(size: CGSize) {
        self.init(frame: CGRect(origin: CGPoint.zero, size: size))

        self.backgroundColor = UIColor.red
        let pan: UIPanGestureRecognizer = UIPanGestureRecognizer(target: self, action: #selector(panGestureProcess(touch:)))
        //------------------------------------
        pan.cancelsTouchesInView = false
        //------------------------------------
        self.addGestureRecognizer(pan)
    }

    @objc func panGestureProcess(touch: UIPanGestureRecognizer) {
        if touch.state == .began {
            print("Pan Gesture Process ...........")
        }
    }

    public override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        print("UIView Touches Began ...........")
        super.touchesBegan(touches, with: event)
    }

    public override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
        print("UIView Touches Moved ...........")
        super.touchesMoved(touches, with: event)
    }

    public override func beginTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
        print("UIControl Began Tracking ...........")
        return super.beginTracking(touch, with: event)
    }

    public override func continueTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
        print("UIControl Continue Tracking ...........")
        return super.continueTracking(touch, with: event)
    }

}

cancelsTouchesInView默认 打印日志

UIView Touches Began ...........
UIControl Began Tracking ...........
.......
Pan Gesture Process ...........  <=======识别后不会触发Move和Continue

cancelsTouchesInView = false 打印日志

UIView Touches Began ...........
UIControl Began Tracking ...........
.........
Pan Gesture Process ...........   <=======识别后还会继续触发Move和Continue
UIView Touches Moved ...........
UIControl Continue Tracking ...........
UIView Touches Moved ...........
UIControl Continue Tracking ...........
UIView Touches Moved ...........
UIControl Continue Tracking ...........
UIView Touches Moved ...........
UIControl Continue Tracking ...........
UIView Touches Moved ...........
UIControl Continue Tracking ...........
UIView Touches Moved ...........
UIControl Continue Tracking ...........
UIView Touches Moved ...........

赏

请问老板还招人么(/ω＼)

支付宝

微信