UI中的七种手势

  1 //
  2 //  GestureRecognizerViewController.m


 10 
 11 #import "GestureRecognizerViewController.h"
 12 #import "UIColor+RandomColor.h"
 13 @interface GestureRecognizerViewController ()
 14 {
 15     
 16     CGRect _frame; // 用来记录view原来的frame
 17     
 18 }
 19 @end
 20 
 21 @implementation GestureRecognizerViewController
 22 
 23 - (void)viewDidLoad {
 24     [super viewDidLoad];
 25     // Do any additional setup after loading the view.
 26 //    UIGestureRecognizer 手势识别器,是所有手势识别类的基类,提供了手势识别器的基本功能,有了手势识别器之后,手势的识别全部由这个类来识别,我们就不再关心手势识别的过程,我们只需要关心手势识别之后应该做哪些操作,它的子类有6个,轻拍手势,捏合手势,长按手势,轻扫手势,旋转手势,平移手势,以及平移手势的子类 屏幕边缘手势
 27     
 28     UIView *view = [[UIView alloc]initWithFrame:(CGRectMake(60, 184, 200, 200))];
 29     view.backgroundColor = [UIColor redColor];
 30     [self.view addSubview:view];
 31     [view release];
 32     
 33     //! 轻拍手势  这种手势用的最多, 跟按钮似的
 34    
 35     // UITapGestureRecognizer
 36     /*
 37     // 1. 创建轻拍手势对象
 38     UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapGesture:)]; // self指视图控制器的对象
 39     
 40     // 2. 设置轻拍触发方法时,需要的点击次数  // 一定要在添加手势之前设置
 41     tapGesture.numberOfTapsRequired = 2;
 42     tapGesture.numberOfTouchesRequired = 2;
 43     
 44     // 3. 向视图对象上添加手势
 45     [view addGestureRecognizer:tapGesture]; // 多态 父类指针指向子类对象
 46 //    [view addGestureRecognizer:<#(UIGestureRecognizer *)#>]
 47     
 48     [tapGesture release];
 49     */
 50     
 51     /**
 52      1. 创建手势识别类的对象(轻拍手势/ 长按手势/ 轻扫手势/ 平移手势/ 捏合手势/ 旋转手势/ 屏幕边缘手势)
 53      
 54      2. 设置手势方法的相关属性(如需要几根手指,多长时间才能触发手势事件 等)   // 根据需要
 55      
 56      3. 向视图对象上添加手势
 57      
 58      4. 释放手势对象
 59      
 60      
 61      */
 62     
 63     // 长按手势 UILongPressGestureRecognizer
 64    /*
 65     UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPressGesture:)];
 66     // 设置长按手势最短的触发事件 秒为单位
 67     longPressGesture.minimumPressDuration = 1;
 68     
 69     [view addGestureRecognizer:longPressGesture];
 70     
 71     [longPressGesture release];
 72     */
 73     
 74     // 轻扫手势 UISwipeGestureRecognizer
 75     
 76     UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGesture:)];
 77     
 78     // 设置轻扫手势支持的方法 (默认是向右扫)
 79     // UISwipeGestureRecognizerDirectionDown 向下扫
 80     swipeGesture.direction = UISwipeGestureRecognizerDirectionDown; // 一定要在添加手势之前设置
 81     
 82     [view addGestureRecognizer:swipeGesture];
 83     
 84     [swipeGesture release];
 85     
 86     // 一个视图可以添加多个手势
 87     // 想要实现多个方向轻扫手势: 再添加一个轻扫手势
 88     UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipe:)];
 89     // UISwipeGestureRecognizerDirectionLeft 向左轻扫
 90     swipe.direction = UISwipeGestureRecognizerDirectionLeft;
 91     
 92     [view addGestureRecognizer:swipe];
 93     [swipe release];
 94     
 95     
 96     // 平移手势 UIPanGestureRecognizer
 97 
 98     UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePanGesTure:)];
 99     
100     [view addGestureRecognizer:panGesture];
101     [panGesture release];
102     
103     
104     
105     // 捏合手势 UIPinchGestureRecognizer
106     
107     UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinchGesture:)];
108     
109 //    pinchGesture.scale
110     
111     [view addGestureRecognizer:pinchGesture];
112     [pinchGesture release];
113     
114     
115     
116     // 旋转手势
117     
118 //    UIRotationGestureRecognizer
119     UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(handleRotationGesture:)];
120     [view addGestureRecognizer:rotationGesture];
121     [rotationGesture release];
122     
123     
124     // 屏幕边缘手势 UIScreenEdgePanGestureRecognizer 是UIPanGestureRecognizer的子类
125     
126     UIScreenEdgePanGestureRecognizer *screenEdgePanGesture = [[UIScreenEdgePanGestureRecognizer alloc] initWithTarget:self action:@selector(handleScreenEdgeGesture:)];
127     
128     // 设置屏幕边缘手势支持方法
129     screenEdgePanGesture.edges = UIRectEdgeRight;
130     // 必须让位置和屏幕边缘重合
131     view.frame = CGRectMake(120, 50, 200, 200);
132     // 使每次移动后的view回到原始位置,实现在action方法中
133     _frame = view.frame;
134     
135     [view addGestureRecognizer:screenEdgePanGesture];
136     
137     
138     [screenEdgePanGesture release];
139     
140     
141 }
142 #pragma mark - 轻拍手势方法
143 - (void)handleTapGesture:(UITapGestureRecognizer *)tapGesture {
144     
145     // 获取轻拍手势所在的视图对象
146     tapGesture.view.backgroundColor = [UIColor randomColor];
147     
148 }
149 
150 
151 
152 #pragma mark - 长按手势方法
153 - (void)handleLongPressGesture:(UILongPressGestureRecognizer *)longPressGesture {
154     
155     // UIGestureRecognizerStateBegan 当达到条件((longPressGesture.minimumPressDuration = 1;))界限时,触发方法事件
156     // UIGestureRecognizerStateChanged 当达到条件时,滑动,触发
157     // UIGestureRecognizerStateEnded 当达到条件,手指离开,触发
158     
159     // 根据长按手势的状态执行
160     if (longPressGesture.state == UIGestureRecognizerStateEnded) {
161         
162         longPressGesture.view.superview.backgroundColor = [UIColor randomColor];
163 
164     }
165     
166 }
167 
168 #pragma mark - 轻扫手势方法
169 - (void)handleSwipeGesture:(UISwipeGestureRecognizer *)swipeGesture {
170     
171     swipeGesture.view.backgroundColor = [UIColor randomColor];
172     
173 }
174 
175 - (void)handleSwipe:(UISwipeGestureRecognizer *)swipe {
176     
177     swipe.view.backgroundColor = [UIColor randomColor];
178 }
179 
180 
181 
182 #pragma mark - 平移手势方法
183 - (void)handlePanGesTure:(UIPanGestureRecognizer *)panGesture {
184     
185     // 1. 获取平移增量
186     CGPoint point = [panGesture translationInView:panGesture.view];
187     // 2. 让视图的位置发生移动,以上次视图为基准,transform 仿射变换技术 (view上所有点跟随移动) 用了线性代数的知识
188     panGesture.view.transform = CGAffineTransformTranslate(panGesture.view.transform, point.x, point.y);
189     //3. 将上次的平移增量置为0
190     //CGPointZero 代表一个(0, 0)的结构体 CGPointMake(0, 0)
191     [panGesture setTranslation:CGPointZero inView:panGesture.view];
192     
193     panGesture.view.backgroundColor = [UIColor randomColor];
194     
195 }
196 
197 #pragma mark - 捏合手势方法
198 - (void)handlePinchGesture:(UIPinchGestureRecognizer *)pinchGesture {
199     
200     // 1.根据比例做放射变换, 也是以上次视图为基准  Scale 比例
201     pinchGesture.view.transform = CGAffineTransformScale(pinchGesture.view.transform, pinchGesture.scale, pinchGesture.scale);
202     // 2.将上次的缩放比例置为1
203     pinchGesture.scale = 1; // 或者[pinchGesture setScale:1];
204     
205     //pinchGesture.view.backgroundColor = [UIColor randomColor];
206     
207 }
208 
209 #pragma mark - 旋转手势方法
210 - (void)handleRotationGesture:(UIRotationGestureRecognizer *)rotationGesture {
211     // 1. 根据旋转角度做放射变换,也是以上次视图形变量为基准 rotation 旋转,旋度
212     rotationGesture.view.transform = CGAffineTransformRotate(rotationGesture.view.transform, rotationGesture.rotation);
213     // 2. 将上次的旋转角度清零
214     rotationGesture.rotation = 0;
215     
216     
217     
218 }
219 
220 #pragma mark - 边缘手势方法
221 // 方法和UIPanGestureRecognizer(平移手势)一样
222 - (void)handleScreenEdgeGesture:(UIScreenEdgePanGestureRecognizer *)screenEdgeGesture {
223     
224     // 手指离开的时候 ,view回到原来的位置
225     if (screenEdgeGesture.state == UIGestureRecognizerStateEnded) {
226         
227         screenEdgeGesture.view.frame = _frame;
228     }
229     
230     // 1.获取手指的平移增量
231     CGPoint point = [screenEdgeGesture translationInView:screenEdgeGesture.view];
232     // 2.根据平移增量做仿射变换
233     screenEdgeGesture.view.transform = CGAffineTransformTranslate(screenEdgeGesture.view.transform, point.x, point.y);
234     // 3. 把平移增量置为0的结构体
235     [screenEdgeGesture setTranslation:CGPointZero inView:screenEdgeGesture.view];
236     
237     //screenEdgeGesture.view.frame = _frame;
238     //NSLog(@"触发了");
239     
240 }
241 
242 - (void)didReceiveMemoryWarning {
243     [super didReceiveMemoryWarning];
244     // Dispose of any resources that can be recreated.
245 }
246 /*
247 #pragma mark - Navigation
248 
249 // In a storyboard-based application, you will often want to do a little preparation before navigation
250 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
251     // Get the new view controller using [segue destinationViewController].
252     // Pass the selected object to the new view controller.
253 }
254 */
255 
256 @end

 

随机颜色

1 //
2 //  UIColor+RandomColor.h
3 //  UILessonTouch-04
4 
5 #import <UIKit/UIKit.h>
6 
7 @interface UIColor (RandomColor)
8 + (UIColor *)randomColor;
9 @end

 1 //
 2 //  UIColor+RandomColor.m
 3 //  UILessonTouch-04
 4 
 5 #import "UIColor+RandomColor.h"
 6 #define kColorValue arc4random_uniform(256) / 255.0
 7 @implementation UIColor (RandomColor)
 8 
 9 + (UIColor *)randomColor {
10     
11     return [UIColor colorWithRed:kColorValue green:kColorValue blue:kColorValue alpha:kColorValue];
12     
13 }
14 
15 @end