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
时间： 2025-01-01 11:34:23