手势

手势

addGestureRecognizer:给视图添加手势，然后再实现@selector( )里的方法 

    轻拍(tap)

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

    //设置轻拍次数(默认1)(按2次好使)

    tap.numberOfTapsRequired = 2;

    //设置轻拍的手指个数（默认1）

 // tap.numberOfTouchesRequired = 2;

    轻扫(swipe)

    //默认从左往右

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

    [imageView addGestureRecognizer:swipe];

    //要么上下一起 要么左右一起（下面的写法只能执行左右）

    swipe.direction = UISwipeGestureRecognizerDirectionDown | UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight | UISwipeGestureRecognizerDirectionUp;

    //设置轻扫手指个数

    swipe.numberOfTouchesRequired = 2;

    捏合（pinch）

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

    [imageView addGestureRecognizer:pinch];

    旋转 （Rotation）

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

    [imageView addGestureRecognizer:rotation];

     平移（Pan）

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

    [imageView addGestureRecognizer:pan];

   长按（LongPress）

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

    [imageView addGestureRecognizer:longpress];

    //长按时间

    longpress.minimumPressDuration = 1;