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Swift基础－－手势识别(双击、捏、旋转、拖动、划动、长按）

Swift 2020-05-27

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  1. //
  2. //ViewController.swift
  3. //JieUITapGestureRecognizer
  4. //
  5. //Createdbyjiezhangon14-10-4.
  6. //Copyright(c)2014年jiezhang.Allrightsreserved.
  8. importUIKit
  9. classViewController:UIViewController,UIActionSheetDelegate{
  10. @IBOutletvarim:UIImageView!
  11. varlastScaleFactor:CGFloat!=1//放大、缩小
  12. varnetRotation:CGFloat=1;//旋转
  13. varnetTranslation:CGPoint!//平移
  14. varimages:NSArray=["meinv1.jpg","mv2.jpg","mv3.jpg","mv4.jpg","mv5.jpg","mv6.jpg"]//图片数组
  15. varimageIndex:Int=0//数组下标
  17. requiredinit(coderaDecoder:NSCoder){
  18. super.init(coder:aDecoder)
  19. netTranslation=CGPoint(x:0,y:0)
  20. }
  21. overridefuncviewDidLoad(){
  22. super.viewDidLoad()
  23. vartapGesture=UITapGestureRecognizer(target:self,0); background-color:inherit">action:"handleTapGesture:")
  24. //设置手势点击数,双击：点2下
  25. tapGesture.numberOfTapsrequired=2
  26. self.view.addGestureRecognizer(tapGesture)
  27. //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
  28. varpinchGesture=UIPinchGestureRecognizer(target:self,0); background-color:inherit">action:"handlePinchGesture:")
  29. self.view.addGestureRecognizer(pinchGesture)
  30. //旋转手势:按住option按钮配合鼠标来做这个动作在虚拟器上
  31. varrotateGesture=UIRotationGestureRecognizer(target:self,0); background-color:inherit">action:"handleRotateGesture:")
  32. self.view.addGestureRecognizer(rotateGesture)
  33. //拖手势
  34. varpanGesture=UIPanGestureRecognizer(target:self,0); background-color:inherit">action:"handlePanGesture:")
  35. //self.view.addGestureRecognizer(panGesture)
  36. //划动手势
  37. //右划
  38. varswipeGesture=UISwipeGestureRecognizer(target:self,0); background-color:inherit">action:"handleSwipeGesture:")
  39. self.view.addGestureRecognizer(swipeGesture)
  40. //左划
  41. varswipeLeftGesture=UISwipeGestureRecognizer(target:self,0); background-color:inherit">action:"handleSwipeGesture:")
  42. swipeLeftGesture.direction=UISwipeGestureRecognizerDirection.Left//不设置是右
  43. self.view.addGestureRecognizer(swipeLeftGesture)
  44. //长按手势
  45. varlongpressGesutre=UILongPressGestureRecognizer(target:self,0); background-color:inherit">action:"handleLongpressGesture:")
  46. //长按时间为1秒
  47. longpressGesutre.minimumPressDuration=1
  48. //允许15秒运动
  49. longpressGesutre.allowableMovement=15
  50. //所需触摸1次
  51. longpressGesutre.numberOfTouchesrequired=1
  52. self.view.addGestureRecognizer(longpressGesutre)
  53. }
  54. overridefuncdidReceiveMemoryWarning(){
  55. super.didReceiveMemoryWarning()
  56. //DispoSEOfanyresourcesthatcanberecreated.
  57. //双击屏幕时会调用此方法,放大和缩小图片
  58. funchandleTapGesture(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. ifim.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. //捏的手势，使图片放大和缩小，捏的动作是一个连续的动作
  66. funchandlePinchGesture(sender:UIPinchGestureRecognizer){
  67. varfactor=sender.scale
  68. iffactor>1{
  69. //图片放大
  70. im.transform=CGAffineTransformMakeScale(lastScaleFactor+factor-1,lastScaleFactor+factor-1)
  71. }else{
  72. //缩小
  73. im.transform=CGAffineTransformMakeScale(lastScaleFactor*factor,lastScaleFactor*factor)
  74. //状态是否结束，如果结束保存数据
  75. ifsender.state==UIGestureRecognizerState.Ended{
  76. iffactor>1{
  77. lastScaleFactor=lastScaleFactor+factor-1
  78. lastScaleFactor=lastScaleFactor*factor
  79. //旋转手势
  80. funchandleRotateGesture(sender:UIRotationGestureRecognizer){
  81. //浮点类型，得到sender的旋转度数
  82. varrotation:CGFloat=sender.rotation
  83. //旋转角度CGAffineTransformMakeRotation,改变图像角度
  84. im.transform=CGAffineTransformMakeRotation(rotation+netRotation)
  85. //状态结束，保存数据
  86. netRotation+=rotation
  87. //拖手势
  88. funchandlePanGesture(sender:UIPanGestureRecognizer){
  89. //得到拖的过程中的xy坐标
  90. vartranslation:CGPoint=sender.translationInView(im)
  91. //平移图片CGAffineTransformMakeTranslation
  92. im.transform=CGAffineTransformMakeTranslation(netTranslation.x+translation.x,netTranslation.y+translation.y)
  93. netTranslation.x+=translation.x
  94. netTranslation.y+=translation.y
  95. funchandleSwipeGesture(sender:UISwipeGestureRecognizer){
  96. //划动的方向
  97. vardirection=sender.direction
  98. //判断是上下左右
  99. switch(direction){
  100. caseUISwipeGestureRecognizerDirection.Left:
  101. println("Left")
  102. imageIndex++;//下标++
  103. break
  104. caseUISwipeGestureRecognizerDirection.Right:
  105. println("Right")
  106. imageIndex--;//下标--
  107. caseUISwipeGestureRecognizerDirection.Up:
  108. println("Up")
  109. break
  110. caseUISwipeGestureRecognizerDirection.Down:
  111. println("Down")
  112. default:
  113. break;
  114. //得到不越界不<0的下标
  115. imageIndex=imageIndex<0?images.count-1:imageIndex%images.count
  116. //imageView显示图片
  117. im.image=UIImage(named:images[imageIndex]asString)
  118. funchandleLongpressGesture(sender:UILongPressGestureRecognizer){
  119. ifsender.state==UIGestureRecognizerState.Began{
  120. //创建警告
  121. varactionSheet=UIActionSheet(title:"Imageoptions",0); background-color:inherit">delegate:self,0); background-color:inherit">cancelButtonTitle:"cancel",0); background-color:inherit">destructiveButtonTitle:"ok",0); background-color:inherit">otherButtonTitles:"other")
  122. actionSheet.showInView(self.view)
  123. }


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

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