Swift基础－－手势识别(双击捏旋转拖动划动长按）

Posted 2020-06-23 brave-sailor

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. }  

 

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