// 添加全部的手勢 - (void) addGestureRecognizerToView:(UIView *)view { // 旋轉手勢 UIRotationGestureRecognizer *rotationGestureRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotateView:)]; [view addGestureRecognizer:rotationGestureRecognizer]; // 縮放手勢 UIPinchGestureRecognizer *pinchGestureRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchView:)]; [view addGestureRecognizer:pinchGestureRecognizer]; // 移動手勢 UIPanGestureRecognizer *panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panView:)]; [view addGestureRecognizer:panGestureRecognizer]; } // 處理旋轉手勢 - (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]; } } // 處理縮放手勢 - (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; } } // 處理拖拉手勢 - (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]; } }
[self addGestureRecognizerToView:view]; //若是處理的是圖片,別忘了 [imageView setUserInteractionEnabled:YES]; [imageView setMultipleTouchEnabled:YES];