swift 触摸与手势

class MyView: UIView {

var lView:UIView!

var time:NSTimer!

override init(frame: CGRect) {

super.init(frame: frame)

//开启多点触控

self.multipleTouchEnabled = true

lView = UIView(frame: CGRect(x: 0, y: 0, width: 50, height: 50));

lView.backgroundColor = UIColor.yellowColor();

self.addSubview(lView)

}

required init?(coder aDecoder: NSCoder) {

super.init(coder: aDecoder)

}

//开始点击时，调用的方法

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

//        println(count)

//拿到一个UITouch对象

//        let touch:UITouch = touches.anyObject() as! UITouch;

let touch = touches.first as UITouch!

//拿到点击次数

let tapCount = touch.tapCount;

if (tapCount == 1)

{

//  单击 singleTap()

//使用定时器延时调用

time = NSTimer.scheduledTimerWithTimeInterval(0.5, target: self, selector:"singleTap", userInfo: nil, repeats: false)

}else

{

//终止定时器

time.invalidate()

doubleTap()

}

}

func singleTap() {

print("单击")

}

func doubleTap() {

print("双击")

}

//触摸移动时，调用的方法

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

// var touch = touches.anyObject() as! UITouch

let touch = touches.first as UITouch!

let location = touch.locationInView(self)

// println("location: \(location.x), \(location.y), \(location)")

let lastLocation = touch.previousLocationInView(self)

// println("lastLocation: \(lastLocation.x), \(lastLocation.y), \(lastLocation)")

let sub = location.x - lastLocation.x

if sub > 0{

print("right")

}else if sub < 0 {

print("left")

}else {

print("move")

}

//让小矩形跟着手势移动  lView.center = location

lView.frame.origin = location

}

}