iOS 添加手势

给图片添加是需要打开用户交互self.imageView.userInteractionEnabled=YES;1.点击    UITapGestureRecognizer *tap=[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction:)];(1)设置点击几次才会触发    tap.numberOfTapsRequired=2;(2)设置几个手指进行点击    tap.numberOfTouchesRequired=2;(3)将手势添加到对应的图片上    [self.imageview addGestureRecognizer:tap];    [tap release];   (4)实现- (void)tapAction:(UITapGestureRecognizer *)tap{    NSLog(@"测试点击手势”);}2.长按    UILongPressGestureRecognizer *longPress=[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(longPressAction:)];(1)设置长按触发的最小时间    longPress.minimumPressDuration=2;(2)用户手指在长按过程中允许的移动距离    longPress.allowableMovement=200;(3)把手势添加到图片上    [self.view addGestureRecognizer:longPress];    [longPress release];(4)实现- (void)longPressAction:(UILongPressGestureRecognizer *)longPress{NSLog(@"测试点击手势”);}3.旋转(1)创建一个旋转手势    UIRotationGestureRecognizer *rotation=[[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];(2)把手势放到图片上    [self.imageview addGestureRecognizer:rotation];(3)释放    [rotation release]; (4)实现-(void)rotation:(UIRotationGestureRecognizer *)rotation{    //可以通过手势获取手势添加的视图是哪一个..UIImageView *imageView=(UIImageView *)rotation.view;    //进行旋转的操作    //通过视图的transform属性让视图进行旋转imageView.transform=CGAffineTransformRotate(imageView.transform, rotation.rotation);    rotation.rotation=0;}4.捏合(1)创建 UIPinchGestureRecognizer *pinch=[[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchAction:)];(2)把手势放到图片上    [self.imageview addGestureRecognizer:pinch];(3)释放    [pinch release];(4)实现-(void)pinchAction:(UIPinchGestureRecognizer*)pinch{//根据手势找视图    UIImageView *imageView=(UIImageView *)pinch.view;//通过transform改变图片的尺寸  imageView.transform=CGAffineTransformScale(imageView.transform, pinch.scale, pinch.scale);    pinch.scale=1;}5.拖拽(1)创建    UIPanGestureRecognizer *pan=[[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];(2)把手势放到图片上    [self.imageview addGestureRecognizer:pan];(3)释放    [pan release];(4)实现- (void)panAction:(UIPanGestureRecognizer *)pan{   //根据手势找视图    UIImageView *imageView=(UIImageView *)pan.view;    //通过手势获得经过的点    CGPoint p=[pan translationInView:imageView];    //设置移动位置 imageView.transform=CGAffineTransformTranslate(imageView.transform, p.x, p.y);    //为了防止手势在操作的时候视图消失    [pan setTranslation:CGPointZero inView:imageView];}6.轻扫(1)创建    UISwipeGestureRecognizer *swipe=[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeAction:)];(2)把手势放到图片上    [self.imageview addGestureRecognizer:swipe];(3)释放    [swipe release];    //轻扫的方向    swipe.direction = UISwipeGestureRecognizerDirectionRight;(4)实现- (void)swipeAction:(UISwipeGestureRecognizer *)swipe{    if (swipe.direction==UISwipeGestureRecognizerDirectionRight) {    NSLog(@"向右");   }}