UIGestureRecognizer手势识别

UIGestureRecognizer

1.#import "ViewController.h"
2.
3.@interface ViewController ()<UIGestureRecognizerDelegate>
4.{
5.    UIImageView *imageView ;
6.    NSInteger flag;
7.}
8.
9.@property (nonatomic,strong) UIView *panView;
10.
11.@end
12.
13.@implementation ViewController
14.
15.- (void)viewDidLoad {
16.    [super viewDidLoad];
17.
18.    UIImage *image = [UIImage imageNamed:@"DSC00592.JPG"];
19.
20.    CGFloat interval = (self.view.frame.size.width - 240) / 2.0;
21.
22.    imageView = [[UIImageView alloc] init];
23.    imageView.frame = CGRectMake(interval, 230, 240, 160);
24.
25.    imageView.image = image;
26.
27.    imageView.userInteractionEnabled = YES;
28.
29.    // 捏合
30.    UIPinchGestureRecognizer *pinchRecognizer = [[UIPinchGestureRecognizer alloc] init];
31.    [pinchRecognizer addTarget:self action:@selector(pinch:)];
32.    [imageView addGestureRecognizer:pinchRecognizer];
33.    pinchRecognizer.delegate = self;//给手势识别器添加委托
34.
35.    // 旋转
36.    UIRotationGestureRecognizer *rotationRecognizer = [[UIRotationGestureRecognizer alloc]
37.                                                       initWithTarget:self action:@selector(rotate:)];
38.    [imageView addGestureRecognizer:rotationRecognizer];
39.    rotationRecognizer.delegate = self;//给手势识别器添加委托
40.
41.    // 点击
42.    UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc]
43.                                             initWithTarget:self action:@selector(tap:)];
44.    tapRecognizer.numberOfTapsRequired = 3;//设置连续点击三次才响应
45.    [imageView addGestureRecognizer:tapRecognizer];
46.
47.    // 长按
48.    UILongPressGestureRecognizer *longPressRecognizer = [[UILongPressGestureRecognizer alloc]
49.                                                         initWithTarget:self action:@selector(longPress:)];
50.    [self.view addGestureRecognizer:longPressRecognizer];
51.
52.
53.    // 滑动 swipe
54.//    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
55.//    swipe.direction = UISwipeGestureRecognizerDirectionRight; // 每个对象只能监听一个方向
56.//    
57.//    [self.view addGestureRecognizer:swipe];
58.
59.    //若需要监听不同方向的滑动那么需要不同懂swipe对象
60.
61.    for (int i = 0; i < 4; i++) {
62.        // 四个方向
63.        UISwipeGestureRecognizerDirection direction[] = {
64.            UISwipeGestureRecognizerDirectionDown,
65.            UISwipeGestureRecognizerDirectionLeft,
66.            UISwipeGestureRecognizerDirectionUp,
67.            UISwipeGestureRecognizerDirectionRight
68.        };
69.        UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];
70.        swipe.direction = direction[i];
71.
72.        [self.view addGestureRecognizer:swipe];
73.    }
74.
75.    // 拖动 pan
76.
77.    _panView = [[UIView alloc] initWithFrame:CGRectMake(30, 100, 30, 30)];
78.    _panView.backgroundColor = [UIColor purpleColor];
79.    [self.view addSubview:_panView];
80.
81.    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
82.    [_panView addGestureRecognizer:pan];
83.
84.
85.    [self.view addSubview:imageView];
86.
87.}
88.
89.-(void)pinch:(UIPinchGestureRecognizer *)recognizer{
90.
91.    imageView.transform = CGAffineTransformScale(imageView.transform,
92.                                                 recognizer.scale,
93.                                                 recognizer.scale);
94.    // 每次捏合之后都要将scale变为1,防止叠加
95.    recognizer.scale = 1;
96.}
97.
98.-(void)rotate:(UIRotationGestureRecognizer *)recognizer{
99.
100.    imageView.transform = CGAffineTransformRotate(imageView.transform, recognizer.rotation);
101.
102.    // 每次旋转后都要将rotation变为0,防止叠加
103.    recognizer.rotation = 0;
104.}
105.
106.-(void)tap:(UITapGestureRecognizer *)recognizer{
107.
108.    [imageView removeFromSuperview];
109.
110.}
111.
112.-(void)longPress:(UILongPressGestureRecognizer *)recognizer{
113.
114.    // 只有在刚监测到长按时才绘制
115.    if (recognizer.state == UIGestureRecognizerStateBegan) {
116.        UIView *view = [[UIView alloc] initWithFrame:CGRectMake(random() % 300, rand() % 600, 50, 50)];
117.        view.backgroundColor = [UIColor orangeColor];
118.        CGPoint point = [recognizer locationInView:self.view];//获取长按的位置
119.        view.center = point;
120.        [self.view addSubview:view];
121.    }
122.
123.}
124.
125.-(void)swipe:(UISwipeGestureRecognizer *)recognizer{
126.    switch (recognizer.direction) {
127.        case UISwipeGestureRecognizerDirectionUp:{
128.            NSLog(@"up");
129.        }
130.            break;
131.
132.        case UISwipeGestureRecognizerDirectionLeft:{
133.            NSLog(@"left");
134.        }
135.            break;
136.        case UISwipeGestureRecognizerDirectionDown:{
137.            NSLog(@"down");
138.        }
139.            break;
140.        case UISwipeGestureRecognizerDirectionRight:{
141.            NSLog(@"right");
142.        }
143.            break;
144.        default:
145.            break;
146.    }
147.}
148.
149.-(void)pan:(UIPanGestureRecognizer *)recognizer{
150.    CGPoint point = [recognizer locationInView:self.view];
151.    _panView.center = point;
152.}
153.
154.
155.
156.// 返回YES使得两个手势操作可以同时实现 (委托方法)
157.- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
158.    return YES;
159.}
160.
161.
162.
163.@end
164.