多点触摸与手势识别
//点击事件 var atap = UITapGestureRecognizer(target: self, action: "tapDo:") self.view.addGestureRecognizer(atap) atap.numberOfTapsRequired = //单击次数 atap.numberOfTouchesRequired = //手指个数 //拖动事件 var aPan = UIPanGestureRecognizer(target: self, action: "handlenPan:") self.view.addGestureRecognizer(aPan) aPan.minimumNumberOfTouches = //最少手指个数 aPan.maximumNumberOfTouches = //最多手指个数 //长按事件 var aLongPress = UILongPressGestureRecognizer(target: self, action: "longPress:") self.view.addGestureRecognizer(aLongPress) aLongPress.minimumPressDuration = //需要长按的时间，最小0.5s //捏合事件 var aPinch = UIPinchGestureRecognizer(target: self, action: "pinchDo:") self.view.addGestureRecognizer(aPinch) //旋转事件 var aRotation = UIRotationGestureRecognizer(target: self, action: "rotatePiece:") self.view.addGestureRecognizer(aRotation) //轻扫事件--左轻扫 var leftSwipe = UISwipeGestureRecognizer(target: self, action: "leftSwipe:") self.view.addGestureRecognizer(leftSwipe) leftSwipe.direction = UISwipeGestureRecognizerDirection.Left //轻扫事件--右轻扫 var rightSwipe = UISwipeGestureRecognizer(target: self, action: "rightSwipe:") self.view.addGestureRecognizer(rightSwipe) rightSwipe.direction = UISwipeGestureRecognizerDirection.Right //轻扫事件--上轻扫 var upSwipe = UISwipeGestureRecognizer(target: self, action: "upSwipe:") self.view.addGestureRecognizer(upSwipe) upSwipe.direction = UISwipeGestureRecognizerDirection.Up //轻扫事件--下轻扫 var downSwipe = UISwipeGestureRecognizer(target: self, action: "downSwipe:") self.view.addGestureRecognizer(downSwipe) downSwipe.direction = UISwipeGestureRecognizerDirection.Down } 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 prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) { // Get the new view controller using segue.destinationViewController. // Pass the selected object to the new view controller. } */ //触摸事件 //手指首次触摸到屏幕 // override func touchesBegan(touches: NSSet, withEvent event: UIEvent) { //2015年5月2后修改,另外：touches --》(touches as NSSet) override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) { println("touchesBegan") //获取touches数量 let numTouches = touches.count //获取点击屏幕的次数 let tapTouches = (touches as NSSet).anyObject()?.tapCount //获取事件发生时间 let timestamp = event.timestamp //获取当前相对于self.view的坐标 let locationPoint = (touches as NSSet).anyObject()?.locationInView(self.view) //获取上一次相对于self.view的坐标 let previousPoint = (touches as NSSet).anyObject()?.previousLocationInView(self.view) //允许使用手势 self.view.userInteractionEnabled = true //支持多点触摸 self.view.multipleTouchEnabled = true println("\(tapTouches)") //判断如果有两个触摸点 { //获取触摸集合 let twoTouches = (touches as NSSet).allObjects //获取触摸数组 let first:UITouch = twoTouches[] as! UITouch //第1个触摸点 let second:UITouch = twoTouches[]as! UITouch //第2个触摸点 //获取第1个点相对于self.view的坐标 let firstPoint:CGPoint = first.locationInView(self.view) //获取第1个点相对于self.view的坐标 let secondPoint:CGPoint = second.locationInView(self.view) //计算两点之间的距离 let deltaX = secondPoint.x - firstPoint.x; let deltaY = secondPoint.y - firstPoint.y; let initialDistance = sqrt(deltaX*deltaX + deltaY*deltaY ) println("两点间距离是：\(initialDistance)") } } //手指在移动 // override func touchesMoved(touches: NSSet, withEvent event: UIEvent) { //2015年5月2后修改 override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) { println("touchesMoved") } //触摸结束 // override func touchesEnded(touches: NSSet, withEvent event: UIEvent) { //2015年5月2后修改 override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) { println("touchesEnded") } //触摸意外终止 //模拟器演示：鼠标拖动的同时，按键盘command+shift+h 相当于点击手机home键，退出应用，触发touchesCancelled事件，在打电话、等情况下也会触发 // override func touchesCancelled(touches: NSSet!, withEvent event: UIEvent!) { //2015年5月2后修改 override func touchesCancelled(touches: Set<NSObject>!, withEvent event: UIEvent!) { println("touchesCancelled") } //手势 //点击事件 func tapDo(sender:UITapGestureRecognizer) { println("点击事件") } //拖动事件 func handlenPan(sender:UIPanGestureRecognizer) { println("拖动事件") if sender.state == .Began { //拖动开始 } else if sender.state == .Changed { //拖动过程 } else if sender.state == .Ended { //拖动结束 } } //长摁事件 func longPress(sender:UILongPressGestureRecognizer) { println("长摁事件") } //捏合事件 func pinchDo(sender:UIPinchGestureRecognizer) { println("捏合") } //旋转事件 func rotatePiece(sender:UIRotationGestureRecognizer) { println("旋转") } //轻扫事件--左轻扫 func leftSwipe(sender:UISwipeGestureRecognizer) { println("左轻扫") } //轻扫事件--右轻扫 func rightSwipe(sender:UISwipeGestureRecognizer) { println("右轻扫") } //轻扫事件--上轻扫 func upSwipe(sender:UISwipeGestureRecognizer) { println("上轻扫") } //轻扫事件--下轻扫 func downSwipe(sender:UISwipeGestureRecognizer) { println("下轻扫") }
