手势

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(click:)];
// 设置触发方法所需点击次数
tap.numberOfTapsRequired = 2;
// 设置触发方法所需手指个数
tap.numberOfTouchesRequired = 2;
// 将手势添加到对应的图片上
[self.imageView addGestureRecognizer:tap];
[tap release];

- (void)click:(UITapGestureRecognizer *)tap {
self.imageView.image = [UIImage imageNamed:@"12345.jpg"];
}

UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressAction:)];
// 设置长按触发所需最小时间
longPress.minimumPressDuration = 2;
// 允许用户手指在长按过程中允许移动的距离
longPress.allowableMovement = 200;
// 把手势添加到imageView中
[self.imageView addGestureRecognizer:longPress];
[longPress release];

- (void)longPressAction:(UILongPressGestureRecognizer *)longPress {
// 长按弹出AlertView
self.alertview = [[UIAlertView alloc] initWithTitle:@"测试" message:@"测试" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:nil, nil];
[self.alertview show];
[self.alertview release];
}

// 创建旋转手势
UIRotationGestureRecognizer *revolve = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(revolveAction:)];
// 把手势放入对应的imageView中
[self.imageView addGestureRecognizer:revolve];
// 释放
[revolve release];

- (void)revolveAction:(UIRotationGestureRecognizer *)revolve {
// 可通过手势获取手势添加的视图是哪个
UIImageView *imageView = (UIImageView *)revolve.view;
// 进行旋转操作
// 通过视图transform属性,对视图进行旋转
imageView.transform = CGAffineTransformRotate(imageView.transform, revolve.rotation);
revolve.rotation = 0;
}

// 创建
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchAction:)];
// 将手势添加到图片上
[self.view addGestureRecognizer:pinch];
// 释放
[pinch release];

- (void)pinchAction:(UIPinchGestureRecognizer *)pinch {
UIImageView *imageView = (UIImageView *)pinch.view;
imageView.transform = CGAffineTransformScale(imageView.transform, pinch.scale, pinch.scale);
// 防止图片消失
pinch.scale = 1;
}

// 创建
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panAction:)];
// 添加
[self.view addGestureRecognizer:pan];
// 释放
[pan release];

- (void)panAction:(UIPanGestureRecognizer *)pan {
UIImageView *imageView = (UIImageView *)pan.view;
// 通过手势获得经过的点
CGPoint p = [pan translationInView:imageView];
// 设置移动的位置
imageView.transform = CGAffineTransformTranslate(imageView.transform, p.x, p.y);
// 为了防止手势在操作时视图消失
[pan setTranslation:CGPointZero inView:imageView];
}

UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeAction:)];
[self.view addGestureRecognizer:swipe];
[swipe release];
// 轻扫方向
swipe.direction = UISwipeGestureRecognizerDirectionRight;

- (void)swipeAction:(UISwipeGestureRecognizer *)swipe {
if (swipe.direction == UISwipeGestureRecognizerDirectionRight)
NSLog(@"测试");
}