IOS学习之手势检测

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1、概述：

UISwipeGestuRecognizer: 滑动（快速滑动）

UITapGestureRecognizer: 点击（轻点）

UIPinchGestureRecognizer: 捏合

UIRotationGestureRecognizer: 旋转

UIPanGestureRecognizer: 拖动（移动速率较慢）

UILogPressGestureRecognizer: 长按

2、工具

Xcode：7.2，语言：Swift

3、滑动（UISwipeGestureRecognizer）

            let swipe = UISwipeGestureRecognizer(target: self, action: "Swipe");        /// 定义滑动方向        swipe.direction = UISwipeGestureRecognizerDirection.Down;                self.view.addGestureRecognizer(swipe);

这里的代码很简单。初始化时，设置了target 和 action。同时，调用View的addGestureRecognizer方法，表示添加一个手势检测。action的方法如下：

    func Swipe()    {        print("swipe");    }

4、轻点、捏合、旋转

        /*  轻点 */        let tapSingle = UITapGestureRecognizer(target: self, action: "tapSingle");                /// 设置触摸点数        tapSingle.numberOfTapsRequired = 1;        /// 设置点击次数        tapSingle.numberOfTouchesRequired = 1;        let tapDouble = UITapGestureRecognizer(target: self, action: "tapDouble");        tapDouble.numberOfTapsRequired = 2;        tapDouble.numberOfTouchesRequired = 1;                /// 双击事件不触发单击事件        tapSingle.requireGestureRecognizerToFail(tapDouble);                /// 添加        view.addGestureRecognizer(tapDouble);        view.addGestureRecognizer(tapSingle);                        /*  捏合  */        let pinch = UIPinchGestureRecognizer(target: self, action: "pinchTouch:");        view.addGestureRecognizer(pinch);                /*  旋转手势  */        let retation = UIRotationGestureRecognizer(target: self, action: "retation:");        view.addGestureRecognizer(retation);

下面是action代码：

    func retation(recognizer:UIRotationGestureRecognizer)    {        print(recognizer.rotation * (180 / CGFloat(M_PI)));    }        func pinchTouch(recognizer: UIPinchGestureRecognizer)    {        print(recognizer.scale);    }        func tapDouble()    {        print("Double");    }        func tapSingle()    {        print("single");    }

5、拖动

/*  拖动手势  */        rect = UIView(frame:CGRectMake(0, 0, 100, 100));        rect.center = view.center;        rect.backgroundColor = UIColor.greenColor();        view.addSubview(rect);                let pan = UIPanGestureRecognizer(target: self, action: "panDid:");        pan.maximumNumberOfTouches = 1;        rect.addGestureRecognizer(pan);

action代码：

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

运行结果（可以拖动有色块移动）：

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