如何一次处理多个触摸手势?
How to handle multiple touch gesture at a time?
我必须一次在我的 imageview
上执行所有手势,这意味着用户可以一次单击移动 imageview
双击也可以缩放和旋转 possible.Now我发现这种方法可以执行多个手势但无法执行缩放和旋转。
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
在我应用 UIPinchGestureRecognizer
、UIRotationGestureRecognizer
和 UIPanGestureRecognizer
之前,它只处理一个手势 time.Please 帮助我解决这个问题或给我任何其他更好的如果可能的话。
UIPinchGestureRecognizer *pinchGesture = ... //initialize
pinchGesture.delegate = self;
//same for rotation gesture
//and then implement delegate method
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
像这样设置手势。
self.view.multipleTouchEnabled=YES;
UIPanGestureRecognizer *panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(moveViewWithGestureRecognizer:)];
panGestureRecognizer.delegate=self;
[self.sub_View addGestureRecognizer:panGestureRecognizer];
UIRotationGestureRecognizer *rotationGestureRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(handleRotationWithGestureRecognizer:)];
rotationGestureRecognizer.delegate=self;
[self.sub_View addGestureRecognizer:rotationGestureRecognizer];
UIPinchGestureRecognizer *pinchGestureRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinchWithGestureRecognizer:)];
pinchGestureRecognizer.delegate=self;
[self.sub_View addGestureRecognizer:pinchGestureRecognizer];
[self.imageView setUserInteractionEnabled:YES];
处理动作
-(void)handlePinchWithGestureRecognizer:(UIPinchGestureRecognizer *)pinchGestureRecognizer{
[self.superImage_View setAlpha:0.5];
if (pinchGestureRecognizer.state == UIGestureRecognizerStateEnded) {
[self.superImage_View setAlpha:1.0];
}
self.imageView.transform = CGAffineTransformScale(self.imageView.transform, pinchGestureRecognizer.scale, pinchGestureRecognizer.scale);
pinchGestureRecognizer.scale =1.0;
}
-(void)handleRotationWithGestureRecognizer:(UIRotationGestureRecognizer *)rotationGestureRecognizer{
[self.superImage_View setAlpha:0.5];
if (rotationGestureRecognizer.state == UIGestureRecognizerStateEnded) {
[self.superImage_View setAlpha:1.0];
}
self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, rotationGestureRecognizer.rotation);
rotationGestureRecognizer.rotation = 0.0;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}
-(void)moveViewWithGestureRecognizer:(UIPanGestureRecognizer *)panGestureRecognizer{
//CGPoint touchLocation = [panGestureRecognizer locationInView:self.sub_View];
// self.imageView.center = touchLocation;
[self.superImage_View setAlpha:0.5];
CGPoint translation = [panGestureRecognizer translationInView:self.view];
self.imageView.center = CGPointMake(self.imageView.center.x + translation.x,
self.imageView.center.y + translation.y);
[panGestureRecognizer setTranslation:CGPointMake(0, 0) inView:self.view];
if (panGestureRecognizer.state == UIGestureRecognizerStateEnded) {
CGPoint velocity = [panGestureRecognizer velocityInView:self.view];
CGFloat magnitude = sqrtf((velocity.x * velocity.x) + (velocity.y * velocity.y));
CGFloat slideMult = magnitude / 200;
// NSLog(@"magnitude: %f, slideMult: %f", magnitude, slideMult);
float slideFactor = 0.1 * slideMult; // Increase for more of a slide
CGPoint finalPoint = CGPointMake(self.imageView.center.x + (velocity.x * slideFactor),
self.imageView.center.y + (velocity.y * slideFactor));
finalPoint.x = MIN(MAX(finalPoint.x, 0), self.view.bounds.size.width);
finalPoint.y = MIN(MAX(finalPoint.y, 0), self.view.bounds.size.height);
[UIView animateWithDuration:slideFactor*2 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
self.imageView.center = finalPoint;
} completion:nil];
[self.superImage_View setAlpha:1.0];
}
}
我必须一次在我的 imageview
上执行所有手势,这意味着用户可以一次单击移动 imageview
双击也可以缩放和旋转 possible.Now我发现这种方法可以执行多个手势但无法执行缩放和旋转。
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
在我应用 UIPinchGestureRecognizer
、UIRotationGestureRecognizer
和 UIPanGestureRecognizer
之前,它只处理一个手势 time.Please 帮助我解决这个问题或给我任何其他更好的如果可能的话。
UIPinchGestureRecognizer *pinchGesture = ... //initialize
pinchGesture.delegate = self;
//same for rotation gesture
//and then implement delegate method
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
像这样设置手势。
self.view.multipleTouchEnabled=YES;
UIPanGestureRecognizer *panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(moveViewWithGestureRecognizer:)];
panGestureRecognizer.delegate=self;
[self.sub_View addGestureRecognizer:panGestureRecognizer];
UIRotationGestureRecognizer *rotationGestureRecognizer = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(handleRotationWithGestureRecognizer:)];
rotationGestureRecognizer.delegate=self;
[self.sub_View addGestureRecognizer:rotationGestureRecognizer];
UIPinchGestureRecognizer *pinchGestureRecognizer = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(handlePinchWithGestureRecognizer:)];
pinchGestureRecognizer.delegate=self;
[self.sub_View addGestureRecognizer:pinchGestureRecognizer];
[self.imageView setUserInteractionEnabled:YES];
处理动作
-(void)handlePinchWithGestureRecognizer:(UIPinchGestureRecognizer *)pinchGestureRecognizer{
[self.superImage_View setAlpha:0.5];
if (pinchGestureRecognizer.state == UIGestureRecognizerStateEnded) {
[self.superImage_View setAlpha:1.0];
}
self.imageView.transform = CGAffineTransformScale(self.imageView.transform, pinchGestureRecognizer.scale, pinchGestureRecognizer.scale);
pinchGestureRecognizer.scale =1.0;
}
-(void)handleRotationWithGestureRecognizer:(UIRotationGestureRecognizer *)rotationGestureRecognizer{
[self.superImage_View setAlpha:0.5];
if (rotationGestureRecognizer.state == UIGestureRecognizerStateEnded) {
[self.superImage_View setAlpha:1.0];
}
self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, rotationGestureRecognizer.rotation);
rotationGestureRecognizer.rotation = 0.0;
}
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}
-(void)moveViewWithGestureRecognizer:(UIPanGestureRecognizer *)panGestureRecognizer{
//CGPoint touchLocation = [panGestureRecognizer locationInView:self.sub_View];
// self.imageView.center = touchLocation;
[self.superImage_View setAlpha:0.5];
CGPoint translation = [panGestureRecognizer translationInView:self.view];
self.imageView.center = CGPointMake(self.imageView.center.x + translation.x,
self.imageView.center.y + translation.y);
[panGestureRecognizer setTranslation:CGPointMake(0, 0) inView:self.view];
if (panGestureRecognizer.state == UIGestureRecognizerStateEnded) {
CGPoint velocity = [panGestureRecognizer velocityInView:self.view];
CGFloat magnitude = sqrtf((velocity.x * velocity.x) + (velocity.y * velocity.y));
CGFloat slideMult = magnitude / 200;
// NSLog(@"magnitude: %f, slideMult: %f", magnitude, slideMult);
float slideFactor = 0.1 * slideMult; // Increase for more of a slide
CGPoint finalPoint = CGPointMake(self.imageView.center.x + (velocity.x * slideFactor),
self.imageView.center.y + (velocity.y * slideFactor));
finalPoint.x = MIN(MAX(finalPoint.x, 0), self.view.bounds.size.width);
finalPoint.y = MIN(MAX(finalPoint.y, 0), self.view.bounds.size.height);
[UIView animateWithDuration:slideFactor*2 delay:0 options:UIViewAnimationOptionCurveEaseOut animations:^{
self.imageView.center = finalPoint;
} completion:nil];
[self.superImage_View setAlpha:1.0];
}
}