ios开发——实用技术篇Swift篇&多点触摸与手势识别

多点触摸与手势识别

 

  1         

  2         //点击事件

  3         var atap = UITapGestureRecognizer(target: self, action: "tapDo:")

  4         self.view.addGestureRecognizer(atap)

  5         atap.numberOfTapsRequired = 1 //单击次数

  6         atap.numberOfTouchesRequired = 1 //手指个数

  7         

  8         //拖动事件

  9         var aPan = UIPanGestureRecognizer(target: self, action: "handlenPan:")

 10         self.view.addGestureRecognizer(aPan)

 11         aPan.minimumNumberOfTouches = 1 //最少手指个数

 12         aPan.maximumNumberOfTouches = 3 //最多手指个数

 13         

 14         //长按事件

 15         var aLongPress = UILongPressGestureRecognizer(target: self, action: "longPress:")

 16         self.view.addGestureRecognizer(aLongPress)

 17         aLongPress.minimumPressDuration = 1 //需要长按的时间，最小0.5s

 18 

 19         //捏合事件

 20         var aPinch = UIPinchGestureRecognizer(target: self, action: "pinchDo:")

 21         self.view.addGestureRecognizer(aPinch)

 22         

 23         //旋转事件

 24         var aRotation = UIRotationGestureRecognizer(target: self, action: "rotatePiece:")

 25         self.view.addGestureRecognizer(aRotation)

 26         

 27         //轻扫事件--左轻扫

 28         var leftSwipe = UISwipeGestureRecognizer(target: self, action: "leftSwipe:")

 29         self.view.addGestureRecognizer(leftSwipe)

 30         leftSwipe.direction =  UISwipeGestureRecognizerDirection.Left

 31         

 32         //轻扫事件--右轻扫

 33         var rightSwipe = UISwipeGestureRecognizer(target: self, action: "rightSwipe:")

 34         self.view.addGestureRecognizer(rightSwipe)

 35         rightSwipe.direction =  UISwipeGestureRecognizerDirection.Right

 36         

 37         //轻扫事件--上轻扫

 38         var upSwipe = UISwipeGestureRecognizer(target: self, action: "upSwipe:")

 39         self.view.addGestureRecognizer(upSwipe)

 40         upSwipe.direction =  UISwipeGestureRecognizerDirection.Up

 41         

 42         //轻扫事件--下轻扫

 43         var downSwipe = UISwipeGestureRecognizer(target: self, action: "downSwipe:")

 44         self.view.addGestureRecognizer(downSwipe)

 45         downSwipe.direction =  UISwipeGestureRecognizerDirection.Down

 46     }

 47 

 48     override func didReceiveMemoryWarning() {

 49         super.didReceiveMemoryWarning()

 50         // Dispose of any resources that can be recreated.

 51     }

 52     

 53 

 54     /*

 55     // MARK: - Navigation

 56 

 57     // In a storyboard-based application, you will often want to do a little preparation before navigation

 58     override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) {

 59         // Get the new view controller using segue.destinationViewController.

 60         // Pass the selected object to the new view controller.

 61     }

 62     */

 63 

 64     

 65     //触摸事件

 66     

 67     //手指首次触摸到屏幕

 68     

 69         

 70 //    override func touchesBegan(touches: NSSet, withEvent event: UIEvent) {

 71         

 72         

 73         //2015年5月2后修改,另外：touches --》(touches as NSSet)

 74     override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {

 75         println("touchesBegan")

 76         

 77         //获取touches数量

 78         let numTouches = touches.count

 79         

 80         //获取点击屏幕的次数

 81         let tapTouches = (touches as NSSet).anyObject()?.tapCount

 82         

 83         //获取事件发生时间

 84         let timestamp = event.timestamp

 85         

 86         //获取当前相对于self.view的坐标

 87         let locationPoint = (touches as NSSet).anyObject()?.locationInView(self.view)

 88         

 89         //获取上一次相对于self.view的坐标

 90         let previousPoint = (touches as NSSet).anyObject()?.previousLocationInView(self.view)

 91         

 92         //允许使用手势

 93         self.view.userInteractionEnabled = true

 94         

 95         //支持多点触摸

 96         self.view.multipleTouchEnabled = true

 97         

 98         println("\(tapTouches)")

 99         

100         

101         //判断如果有两个触摸点

102         if touches.count == 2

103         {

104             //获取触摸集合

105             let twoTouches = (touches as NSSet).allObjects

106             

107             //获取触摸数组

108             let first:UITouch = twoTouches[0] as! UITouch //第1个触摸点

109             let second:UITouch = twoTouches[1]as! UITouch //第2个触摸点

110             

111             //获取第1个点相对于self.view的坐标

112             let firstPoint:CGPoint = first.locationInView(self.view)

113             

114             //获取第1个点相对于self.view的坐标

115             let secondPoint:CGPoint = second.locationInView(self.view)

116             

117             //计算两点之间的距离

118             let deltaX = secondPoint.x - firstPoint.x;

119             let deltaY = secondPoint.y - firstPoint.y;

120             let initialDistance = sqrt(deltaX*deltaX + deltaY*deltaY )

121             

122             println("两点间距离是：\(initialDistance)")

123         }

124     }

125     

126     //手指在移动

127 //    override func touchesMoved(touches: NSSet, withEvent event: UIEvent) {

128     

129     //2015年5月2后修改

130     override func touchesMoved(touches: Set<NSObject>, withEvent event: UIEvent) {

131         

132         println("touchesMoved")

133     }

134     

135     //触摸结束

136 //    override func touchesEnded(touches: NSSet, withEvent event: UIEvent) {

137     

138     //2015年5月2后修改

139     override func touchesEnded(touches: Set<NSObject>, withEvent event: UIEvent) {

140         

141         println("touchesEnded")

142     }

143     

144     //触摸意外终止

145     //模拟器演示：鼠标拖动的同时，按键盘command+shift+h 相当于点击手机home键，退出应用，触发touchesCancelled事件，在打电话、等情况下也会触发

146 //    override func touchesCancelled(touches: NSSet!, withEvent event: UIEvent!) {

147     

148     //2015年5月2后修改

149     override func touchesCancelled(touches: Set<NSObject>!, withEvent event: UIEvent!) {

150         

151         println("touchesCancelled")

152     }

153     

154     

155     

156     

157     

158     

159     //手势

160     

161     //点击事件

162     func tapDo(sender:UITapGestureRecognizer)

163     {

164         

165         println("点击事件")

166     }

167     

168     //拖动事件

169     func handlenPan(sender:UIPanGestureRecognizer)

170     {

171         println("拖动事件")

172         

173         if sender.state == .Began

174         {

175             //拖动开始

176         }

177         else if sender.state == .Changed

178         {

179             //拖动过程

180         }

181         else if sender.state == .Ended

182         {

183             //拖动结束

184         }

185     }

186     

187     //长摁事件

188     func longPress(sender:UILongPressGestureRecognizer)

189     {

190         println("长摁事件")

191         

192         

193     }

194     

195     //捏合事件

196     func pinchDo(sender:UIPinchGestureRecognizer)

197     {

198         println("捏合")

199     }

200 

201     //旋转事件

202     func rotatePiece(sender:UIRotationGestureRecognizer)

203     {

204         println("旋转")

205     }

206 

207     

208     //轻扫事件--左轻扫

209     func leftSwipe(sender:UISwipeGestureRecognizer)

210     {

211         println("左轻扫")

212     }

213     

214     //轻扫事件--右轻扫

215     func rightSwipe(sender:UISwipeGestureRecognizer)

216     {

217         println("右轻扫")

218     }

219     

220     //轻扫事件--上轻扫

221     func upSwipe(sender:UISwipeGestureRecognizer)

222     {

223         println("上轻扫")

224     }

225     

226     //轻扫事件--下轻扫

227     func downSwipe(sender:UISwipeGestureRecognizer)

228     {

229         println("下轻扫")

230     }

231