Swift基础－－手势识别(双击、捏、旋转、拖动、划动、长按）

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

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