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];  
  •     }  
  • }  

 

别忘了

Java代码  
  1. [self addGestureRecognizerToView:view];  

 

如果处理的是图片,别忘了

 
C代码  
  1. [imageView setUserInteractionEnabled:YES];  
  2. [imageView setMultipleTouchEnabled:YES];  

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