1 // touch(触摸)、和手势
2 // 手势核心就是设置delegate和在需要手势监测的view上使用addGestureRecognizer添加指定的手势监测
3 #import "ViewController.h"
4 @interface ViewController ()<UIGestureRecognizerDelegate> // 添加手势代理协议
5 {
6 /** 定义UIImageView类型全局变量image */
7 UIImageView* image;
8 }
9
10 // touch的四种方法 （3.2以前主要使用这四种方法） touch可以用来自定义手势
11 -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event; // 开始
12 //{
13 // UITouch* touch = [touches anyObject]; // 点击对象
14 // CGPoint poin = [touch locationInView:self]; // 获取点击位置
15 //}
16 -(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event; // 解除，取消
17 -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event; // 结束
18 -(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event; // 移动
19 @end
20 @implementation ViewController
21 - (void)viewDidLoad {
22 [super viewDidLoad];
23
24 image =[[UIImageView alloc]initWithFrame:CGRectMake(100, 100, 100, 100)];
25 // 添加图片到视图
26 image.image = [UIImage imageNamed:@"素材07-6"];
27 // 设置图片类型为合适
28 image.contentMode = UIViewContentModeScaleAspectFit;
29 // 添加视图上
30 [self.view addSubview:image];
31 // 允许与用户交互
32 image.userInteractionEnabled = YES;
33
34 // 手势 继承UIGestureRecognizer
35 /*
36 UITapGestureRecognizer, // 点击
37 UIPinchGestureRecognizer, // 捏合
38 UIRotationGestureRecognizer, // 旋转
39 UISwipeGestureRecognizer, // 滑动，快速移动
40 UIPanGestureRecognizer, // 拖动，慢速移动
41 UILongPressGestureRecognizer // 长按
42
43 有些手势是关联的，例如：Tap与LongPress、Swipe与Pan、或是Tap一次与Tap两次
44
45 手势识别是具有互斥的原则的，比如单击和双击，如果他识别出一种手势，其后的手势将不被识别；
46
47 关联手势的处理：比如单击和双击，如果不做处理，它就只能发送单击的消息。为了能够识别出双击手势，就需要做一个特殊的处理逻辑，即先判断手势是否是双击，在双击失效的情况下作为单击手势处理。
48 [A requireGestureRecognizerToFail: B];函数，它可以指定当A手势发生时，即便A已经满足条件了，也不会立刻触发，会等到指定的手势B确定失败之后才触发。
49 */
50 // 点击（单击）
51 UITapGestureRecognizer* oneTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(oneTap:)];
52 // 单击，numberOfTapsRequired = 2 是双击 // 设置一个时间间隔
53 oneTap.numberOfTapsRequired = 1; // 设置点击次数
54 // 点击的手指数 默认为1
55 oneTap.numberOfTouchesRequired = 1;
56 // 默认为0
57 int a= oneTap.numberOfTouches;
58 NSLog(@"a = %d",a);
59 // 添加手势监测
60 [image addGestureRecognizer:oneTap];
61
62 // 双击
63 UITapGestureRecognizer* twoTap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(twoTap:)];
64 twoTap.numberOfTapsRequired = 2;
65 [image addGestureRecognizer:twoTap];
66
67 //（关键）、双击手势确定监测失败才会触发单击手势的响应操作(手势互斥时使用)
68 [oneTap requireGestureRecognizerToFail:twoTap]; // 手势的依赖性
69
70
71 // 捏合
72 UIPinchGestureRecognizer* pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinch:)];
73 [image addGestureRecognizer:pinch];
74
75 // 旋转
76 UIRotationGestureRecognizer* rotation = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotation:)];
77 [image addGestureRecognizer:rotation];
78
79 // 滑动，快速移动
80 UISwipeGestureRecognizer* swipe = [[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(swipe:)];
81 // 设置滑动方向 默认时向右
82 swipe.direction = UISwipeGestureRecognizerDirectionRight;
83 typedef enum{
84 UISwipeGestureRecognizerDirectionDown, //
85 UISwipeGestureRecognizerDirectionLeft, // 向左
86 UISwipeGestureRecognizerDirectionRight, // 向右
87 UISwipeGestureRecognizerDirectionUp, //
88 }UISwipeGestureRecognizerDirection;
89
90 [image addGestureRecognizer:swipe];
91
92 // 拖动，慢速移动
93 UIPanGestureRecognizer* pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(pan:)];
94 // 默认为－1；最大触摸点数
95 pan.maximumNumberOfTouches = 1; //
96 // 默认为1；最小触摸点数
97 pan.minimumNumberOfTouches = 2; // 这两个属性只有Pan有
98
99 [image addGestureRecognizer:pan];
100
101 // 长按
102 UILongPressGestureRecognizer* zer = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(lon:)];
103 // 设置长按时间
104 zer.minimumPressDuration = 0.5; // 2秒
105 [image addGestureRecognizer:zer];
106 }
107 // 点击(单击)
108 - (void)oneTap:(UITapGestureRecognizer*)tap{
109 // if (tap.numberOfTapsRequired == 1) {
110 // NSLog(@"单击");
111 // }else if(tap.numberOfTapsRequired == 2){
112 // NSLog(@"双击");
113 // }
114
115 NSLog(@"单击");
116 }
117 // 双击
118 - (void)twoTap:(UITapGestureRecognizer*)two{
119 NSLog(@"双击");
120 }
121
122 // 捏合
123 - (void)pinch:(UIPinchGestureRecognizer*)pinch{
124 // 放大缩小 （形变属性）
125 pinch.view.transform = CGAffineTransformScale(pinch.view.transform, pinch.scale, pinch.scale);
126 // 恢复标准 标准是1，大于1放大，小于1缩小
127 pinch.scale = 1;
128 // 清空形变属性
129 // pinch.view.transform = CGAffineTransformIdentity;
130
131 // 和上面等效 （但是这种方法缩放时没有滑动而是直接闪现缩放）
132 pinch.view.transform = CGAffineTransformScale(CGAffineTransformIdentity, pinch.scale, pinch.scale);
133 }
134 // 旋转
135 - (void)rotation:(UIRotationGestureRecognizer*)rotation{
136 // 旋转（形变属性） // 和上面同理
137 rotation.view.transform = CGAffineTransformRotate(rotation.view.transform, rotation.rotation);
138 //
139 rotation.rotation = 0;
140
141 // rotation.view.transform = CGAffineTransformRotate(CGAffineTransformIdentity, rotation.rotation);
142 }
143 // 滑动，快速移动
144 - (void)swipe:(UISwipeGestureRecognizer*)swipe{
145 NSLog(@"快速移动");
146 }
147 // 拖动，慢速移动
148 - (void)pan:(UIPanGestureRecognizer*)pan{
149 // 移动（形变属性） // 和上面同理
150 CGPoint translation = [pan translationInView:self.view];
151 pan.view.center = CGPointMake(pan.view.center.x + translation.x, pan.view.center.y + translation.y);
152 [pan setTranslation:CGPointZero inView:self.view];
153 }
154 // 长按
155 -(void)lon:(UILongPressGestureRecognizer*)longe{
156 NSLog(@"长按");
157 }
158
159 // 代理方法
160 -(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
161 return YES;
162 }
163 -(BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer{
164 return YES;
165 }
166 -(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRequireFailureOfGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
167 return YES;
168 }
169 -(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
170 return YES;
171 }
172 -(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldBeRequiredToFailByGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
173 return YES;
174 }
