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 UIKit  
      
    class 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