ui中各种手势的用法

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    self.view.backgroundColor = [UIColor whiteColor];

    UIImageView *image = [[UIImageView alloc]initWithFrame:[UIScreen mainScreen].bounds];

    image.backgroundColor = [UIColor blackColor];

    image.image = [UIImage imageNamed:@"4444.jpg"];

    image.contentMode = UIViewContentModeScaleAspectFit;

    [self.view addSubview:image];

    [image release];

//  1. 点击（tap）

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapClick:)];

//    执行方法需要点击的次数

    tap.numberOfTapsRequired = 2;

//    执行方法需要的触点

    tap.numberOfTouchesRequired = 1;

    [image addGestureRecognizer:tap];

    image.userInteractionEnabled = YES;

    [tap release];

//    2.长按

    UILongPressGestureRecognizer *l = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longp:)];

//    默认 0。5 --长按的时间

    l.minimumPressDuration = 3;

//长按可以移动的距离

    l.allowableMovement = 100;

    [image addGestureRecognizer:l];

    [l release];

//    3.旋转

    UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];

//    

    rotation.rotation = 111;

//    

    

    [image addGestureRecognizer:rotation];

    [rotation release];

//    4.捏合

    UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinch:)];

   

    [image addGestureRecognizer:pinch];

    [pinch release];

//    5.平移

    UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(pan:)];

//    

    

    [image addGestureRecognizer:pan];

    [pan release];

//    6.轻扫手势

    UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe:)];

    

    

    [image addGestureRecognizer:swipe];

    [swipe release];

//    7.屏幕边缘手势

    UIScreenEdgePanGestureRecognizer *screen = [[UIScreenEdgePanGestureRecognizer alloc]initWithTarget:self action:@selector(screen:)];

    

    

    

    

    [image addGestureRecognizer:screen];

    [screen release];

}

- (void)screen:(UIScreenEdgePanGestureRecognizer *)se {

    NSLog(@"屏幕边缘");

}

- (void)swipe:(UISwipeGestureRecognizer *)s {

    NSLog(@"轻扫");

}

- (void)pan:(UIPanGestureRecognizer *)p {

    NSLog(@"平移");

//    获取视图

    UIView *imageV = p.view;

    CGPoint point = [p translationInView:imageV];

    imageV.transform = CGAffineTransformTranslate(imageV.transform, point.x, point.y);

    [p setTranslation:CGPointZero inView:imageV];

    

}

- (void)pinch:(UIPinchGestureRecognizer *)p {

    NSLog(@"捏合");

    

//    很重要的一个属性scale，会被捕获到缩放的倍数

//    参数一：原来的transform

//    参数二：水平方向缩放的倍数

//    参数三：垂直方向缩放的倍数

//    CGAffineTansform 仿射变换矩阵（矩阵中放置view的缩放倍数，旋转角度，x,y坐标等参数）

//    获取手势所在的view

    UIView *imageV = p.view;

//    将x,y方向的缩放倍数传给transform

    p.view.transform = CGAffineTransformScale(p.view.transform, p.scale, p.scale);

//    会被多次调用这个方法，所以每次都要重置缩放倍数为原始倍数

    p.scale = 1.0f;

}

- (void)rotation:(UIRotationGestureRecognizer *)r {

    NSLog(@"旋转");

//    改变矩阵的角度参数

    r.view.transform = CGAffineTransformRotate(r.view.transform, r.rotation);

//    重置角度，因为在这个方法在旋转时会时时被调用

    r.rotation = 0.0f;

}

- (void)longp:(UILongPressGestureRecognizer *)l {

    NSLog(@"长按");

}

- (void)tapClick:(UITapGestureRecognizer *)tap {

    NSLog(@"点击手势");

}

//    设置同时可以有两个手势同时识别

//    基本上是同时识别两个,默认为NO

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer

shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {

    return YES;

}