swift手势识别

  1 //
  2 //  ViewController.swift
  3 //  JieUITapGestureRecognizer
  4 //
  5 //  Created by jiezhang on 14-10-4.
  6 //  Copyright (c) 2014年 jiezhang. All rights reserved.
  7 //
  8
  9 import UIKit
 10
 11 class ViewController: UIViewController, UIActionSheetDelegate {
 12
 13     @IBOutlet var im: UIImageView!
 14     var lastScaleFactor : CGFloat! = 1  //放大、缩小
 15     var netRotation : CGFloat = 1;//旋转
 16     var netTranslation : CGPoint!//平移
 17     var images : NSArray = ["meinv1.jpg","mv2.jpg","mv3.jpg","mv4.jpg","mv5.jpg","mv6.jpg"]// 图片数组
 18     var imageIndex : Int = 0 //数组下标
 19
 20
 21     required init(coder aDecoder: NSCoder) {
 22         super.init(coder: aDecoder)
 23         netTranslation = CGPoint(x: 0, y: 0)
 24     }
 25
 26     override func viewDidLoad() {
 27         super.viewDidLoad()
 28
 29
 30         var tapGesture = UITapGestureRecognizer(target: self, action: "handleTapGesture:")
 31         //设置手势点击数,双击：点2下
 32         tapGesture.numberOfTapsRequired = 2
 33         self.view.addGestureRecognizer(tapGesture)
 34
 35         //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
 36         var pinchGesture = UIPinchGestureRecognizer(target: self, action: "handlePinchGesture:")
 37         self.view.addGestureRecognizer(pinchGesture)
 38
 39         //旋转手势:按住option按钮配合鼠标来做这个动作在虚拟器上
 40         var rotateGesture = UIRotationGestureRecognizer(target: self, action: "handleRotateGesture:")
 41         self.view.addGestureRecognizer(rotateGesture)
 42
 43         //拖手势
 44         var panGesture = UIPanGestureRecognizer(target: self, action: "handlePanGesture:")
 45 //        self.view.addGestureRecognizer(panGesture)
 46
 47         //划动手势
 48         //右划
 49         var swipeGesture = UISwipeGestureRecognizer(target: self, action: "handleSwipeGesture:")
 50         self.view.addGestureRecognizer(swipeGesture)
 51         //左划
 52         var swipeLeftGesture = UISwipeGestureRecognizer(target: self, action: "handleSwipeGesture:")
 53         swipeLeftGesture.direction = UISwipeGestureRecognizerDirection.Left //不设置是右
 54         self.view.addGestureRecognizer(swipeLeftGesture)
 55
 56         //长按手势
 57         var longpressGesutre = UILongPressGestureRecognizer(target: self, action: "handleLongpressGesture:")
 58         //长按时间为1秒
 59         longpressGesutre.minimumPressDuration = 1
 60         //允许15秒运动
 61         longpressGesutre.allowableMovement = 15
 62         //所需触摸1次
 63         longpressGesutre.numberOfTouchesRequired = 1
 64         self.view.addGestureRecognizer(longpressGesutre)
 65     }
 66
 67     override func didReceiveMemoryWarning() {
 68         super.didReceiveMemoryWarning()
 69         // Dispose of any resources that can be recreated.
 70     }
 71
 72     //双击屏幕时会调用此方法,放大和缩小图片
 73     func handleTapGesture(sender: UITapGestureRecognizer){
 74         //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
 75         if im.contentMode == UIViewContentMode.ScaleAspectFit{
 76             //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
 77            im.contentMode = UIViewContentMode.Center
 78         }else{
 79             im.contentMode = UIViewContentMode.ScaleAspectFit
 80         }
 81     }
 82
 83     //捏的手势，使图片放大和缩小，捏的动作是一个连续的动作
 84     func handlePinchGesture(sender: UIPinchGestureRecognizer){
 85         var factor = sender.scale
 86         if factor > 1{
 87             //图片放大
 88             im.transform = CGAffineTransformMakeScale(lastScaleFactor+factor-1, lastScaleFactor+factor-1)
 89         }else{
 90             //缩小
 91             im.transform = CGAffineTransformMakeScale(lastScaleFactor*factor, lastScaleFactor*factor)
 92         }
 93         //状态是否结束，如果结束保存数据
 94         if sender.state == UIGestureRecognizerState.Ended{
 95             if factor > 1{
 96                 lastScaleFactor = lastScaleFactor + factor - 1
 97             }else{
 98                 lastScaleFactor = lastScaleFactor * factor
 99             }
100         }
101     }
102
103     //旋转手势
104     func handleRotateGesture(sender: UIRotationGestureRecognizer){
105         //浮点类型，得到sender的旋转度数
106         var rotation : CGFloat = sender.rotation
107         //旋转角度CGAffineTransformMakeRotation,改变图像角度
108         im.transform = CGAffineTransformMakeRotation(rotation+netRotation)
109         //状态结束，保存数据
110         if sender.state == UIGestureRecognizerState.Ended{
111             netRotation += rotation
112         }
113     }
114     //拖手势
115     func handlePanGesture(sender: UIPanGestureRecognizer){
116         //得到拖的过程中的xy坐标
117         var translation : CGPoint = sender.translationInView(im)
118         //平移图片CGAffineTransformMakeTranslation
119         im.transform = CGAffineTransformMakeTranslation(netTranslation.x+translation.x, netTranslation.y+translation.y)
120         if sender.state == UIGestureRecognizerState.Ended{
121             netTranslation.x += translation.x
122             netTranslation.y += translation.y
123         }
124     }
125     //划动手势
126     func handleSwipeGesture(sender: UISwipeGestureRecognizer){
127         //划动的方向
128         var direction = sender.direction
129         //判断是上下左右
130         switch (direction){
131         case UISwipeGestureRecognizerDirection.Left:
132             println("Left")
133             imageIndex++;//下标++
134             break
135         case UISwipeGestureRecognizerDirection.Right:
136             println("Right")
137             imageIndex--;//下标--
138             break
139         case UISwipeGestureRecognizerDirection.Up:
140             println("Up")
141             break
142         case UISwipeGestureRecognizerDirection.Down:
143             println("Down")
144             break
145         default:
146             break;
147         }
148         //得到不越界不<0的下标
149         imageIndex = imageIndex < 0 ? images.count-1:imageIndex%images.count
150         //imageView显示图片
151         im.image = UIImage(named: images[imageIndex] as String)
152     }
153
154     //长按手势
155     func handleLongpressGesture(sender : UILongPressGestureRecognizer){
156
157         if sender.state == UIGestureRecognizerState.Began{
158             //创建警告
159             var actionSheet = UIActionSheet(title: "Image options", delegate: self, cancelButtonTitle: "cancel", destructiveButtonTitle: "ok", otherButtonTitles: "other")
160             actionSheet.showInView(self.view)
161         }
162     }
163 }