Swift基础－－手势识别(双击、捏、旋转、拖动、划动、长按）

////  ViewController.swift//  JieUITapGestureRecognizer////  Created by jiezhang on 14-10-4.//  Copyright (c) 2014年 jiezhang. All rights reserved.//import UIKitclass ViewController: UIViewController, UIActionSheetDelegate {        @IBOutlet var im: UIImageView!    var lastScaleFactor : CGFloat! = 1  //放大、缩小    var netRotation : CGFloat = 1;//旋转    var netTranslation : CGPoint!//平移    var images : NSArray = ["meinv1.jpg","mv2.jpg","mv3.jpg","mv4.jpg","mv5.jpg","mv6.jpg"]// 图片数组    var imageIndex : Int = 0 //数组下标        required init(coder aDecoder: NSCoder) {        super.init(coder: aDecoder)        netTranslation = CGPoint(x: 0, y: 0)    }        override func viewDidLoad() {        super.viewDidLoad()                      var tapGesture = UITapGestureRecognizer(target: self, action: "handleTapGesture:")        //设置手势点击数,双击：点2下        tapGesture.numberOfTapsRequired = 2        self.view.addGestureRecognizer(tapGesture)                //手势为捏的姿势:按住option按钮配合鼠标来做这个动作在虚拟器上        var pinchGesture = UIPinchGestureRecognizer(target: self, action: "handlePinchGesture:")        self.view.addGestureRecognizer(pinchGesture)                //旋转手势:按住option按钮配合鼠标来做这个动作在虚拟器上        var rotateGesture = UIRotationGestureRecognizer(target: self, action: "handleRotateGesture:")        self.view.addGestureRecognizer(rotateGesture)                //拖手势        var panGesture = UIPanGestureRecognizer(target: self, action: "handlePanGesture:")//        self.view.addGestureRecognizer(panGesture)                //划动手势        //右划        var swipeGesture = UISwipeGestureRecognizer(target: self, action: "handleSwipeGesture:")        self.view.addGestureRecognizer(swipeGesture)        //左划        var swipeLeftGesture = UISwipeGestureRecognizer(target: self, action: "handleSwipeGesture:")        swipeLeftGesture.direction = UISwipeGestureRecognizerDirection.Left //不设置是右        self.view.addGestureRecognizer(swipeLeftGesture)                //长按手势        var longpressGesutre = UILongPressGestureRecognizer(target: self, action: "handleLongpressGesture:")        //长按时间为1秒        longpressGesutre.minimumPressDuration = 1        //允许15秒运动        longpressGesutre.allowableMovement = 15        //所需触摸1次        longpressGesutre.numberOfTouchesRequired = 1        self.view.addGestureRecognizer(longpressGesutre)    }    override func didReceiveMemoryWarning() {        super.didReceiveMemoryWarning()        // Dispose of any resources that can be recreated.    }        //双击屏幕时会调用此方法,放大和缩小图片    func handleTapGesture(sender: UITapGestureRecognizer){        //判断imageView的内容模式是否是UIViewContentModeScaleAspectFit,该模式是原比例，按照图片原时比例显示大小         if im.contentMode == UIViewContentMode.ScaleAspectFit{            //把imageView模式改成UIViewContentModeCenter，按照图片原先的大小显示中心的一部分在imageView           im.contentMode = UIViewContentMode.Center        }else{            im.contentMode = UIViewContentMode.ScaleAspectFit        }    }        //捏的手势，使图片放大和缩小，捏的动作是一个连续的动作    func handlePinchGesture(sender: UIPinchGestureRecognizer){        var factor = sender.scale        if factor > 1{            //图片放大            im.transform = CGAffineTransformMakeScale(lastScaleFactor+factor-1, lastScaleFactor+factor-1)        }else{            //缩小            im.transform = CGAffineTransformMakeScale(lastScaleFactor*factor, lastScaleFactor*factor)        }        //状态是否结束，如果结束保存数据        if sender.state == UIGestureRecognizerState.Ended{            if factor > 1{                lastScaleFactor = lastScaleFactor + factor - 1            }else{                lastScaleFactor = lastScaleFactor * factor            }        }    }        //旋转手势    func handleRotateGesture(sender: UIRotationGestureRecognizer){        //浮点类型，得到sender的旋转度数         var rotation : CGFloat = sender.rotation        //旋转角度CGAffineTransformMakeRotation,改变图像角度        im.transform = CGAffineTransformMakeRotation(rotation+netRotation)        //状态结束，保存数据        if sender.state == UIGestureRecognizerState.Ended{            netRotation += rotation        }    }    //拖手势    func handlePanGesture(sender: UIPanGestureRecognizer){        //得到拖的过程中的xy坐标        var translation : CGPoint = sender.translationInView(im)        //平移图片CGAffineTransformMakeTranslation        im.transform = CGAffineTransformMakeTranslation(netTranslation.x+translation.x, netTranslation.y+translation.y)        if sender.state == UIGestureRecognizerState.Ended{            netTranslation.x += translation.x            netTranslation.y += translation.y        }    }    //划动手势    func handleSwipeGesture(sender: UISwipeGestureRecognizer){        //划动的方向        var direction = sender.direction        //判断是上下左右        switch (direction){        case UISwipeGestureRecognizerDirection.Left:            println("Left")            imageIndex++;//下标++            break        case UISwipeGestureRecognizerDirection.Right:            println("Right")            imageIndex--;//下标--            break        case UISwipeGestureRecognizerDirection.Up:            println("Up")            break        case UISwipeGestureRecognizerDirection.Down:            println("Down")            break        default:            break;        }        //得到不越界不<0的下标        imageIndex = imageIndex < 0 ? images.count-1:imageIndex%images.count        //imageView显示图片        im.image = UIImage(named: images[imageIndex] as String)    }        //长按手势    func handleLongpressGesture(sender : UILongPressGestureRecognizer){                if sender.state == UIGestureRecognizerState.Began{            //创建警告            var actionSheet = UIActionSheet(title: "Image options", delegate: self, cancelButtonTitle: "cancel", destructiveButtonTitle: "ok", otherButtonTitles: "other")            actionSheet.showInView(self.view)        }    }}

注意：滑动手势和拖手势冲突，两个选一个测试，至于测试的效果自己新建一个工程来把代码加入就行