ios开发--旋转、移动、缩放手势实例代码

// 添加所有的手势

- (void) addGestureRecognizerToView:(UIView *)view

{

// 旋转手势

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

[view addGestureRecognizer:rotationGestureRecognizer];

// 缩放手势

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

[view addGestureRecognizer:pinchGestureRecognizer];

// 移动手势

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

[view addGestureRecognizer:panGestureRecognizer];

}

// 处理旋转手势

- (void) rotateView:(UIRotationGestureRecognizer *)rotationGestureRecognizer

{

UIView *view = rotationGestureRecognizer.view;

if (rotationGestureRecognizer.state == UIGestureRecognizerStateBegan || rotationGestureRecognizer.state == UIGestureRecognizerStateChanged) {

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

[rotationGestureRecognizer setRotation:0];

}

}

// 处理缩放手势

- (void) pinchView:(UIPinchGestureRecognizer *)pinchGestureRecognizer

{

UIView *view = pinchGestureRecognizer.view;

if (pinchGestureRecognizer.state == UIGestureRecognizerStateBegan || pinchGestureRecognizer.state == UIGestureRecognizerStateChanged) {

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

pinchGestureRecognizer.scale = 1;

}

}

// 处理拖拉手势

- (void) panView:(UIPanGestureRecognizer *)panGestureRecognizer

{

UIView *view = panGestureRecognizer.view;

if (panGestureRecognizer.state == UIGestureRecognizerStateBegan || panGestureRecognizer.state == UIGestureRecognizerStateChanged) {

CGPoint translation = [panGestureRecognizer translationInView:view.superview];

[view setCenter:(CGPoint){view.center.x + translation.x, view.center.y + translation.y}];

[panGestureRecognizer setTranslation:CGPointZero inView:view.superview];

}

}

转载来源：http://apluck.iteye.com/blog/1781607/