Question

我看过一些应用程序，他们可以同时缩放和旋转图像。它不需要释放手指触摸。

我的以下代码要求： 1.触摸按比例缩放 2.发布 3.触摸旋转

我如何同时缩放和旋转？

在我的主要代码中：

UIPanGestureRecognizer *imagePanGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(moveImage:)];
[imagePanGesture setMinimumNumberOfTouches:1];
[imagePanGesture setMaximumNumberOfTouches:1];
[tempImageView addGestureRecognizer:imagePanGesture]; 

UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(scaleImage:)];
[tempImageView addGestureRecognizer:pinchGesture];  

UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotateImage:)];
[tempImageView addGestureRecognizer:rotationGesture];

在个人比例和旋转中

- (void)scaleImage:(UIPinchGestureRecognizer *)recognizer 
{
    if([recognizer state] == UIGestureRecognizerStateEnded) 
    {
        previousScale = 1.0;
        return;
    }

    CGFloat newScale = 1.0 - (previousScale - [recognizer scale]);

    CGAffineTransform currentTransformation = [recognizer view].transform;
    CGAffineTransform newTransform = CGAffineTransformScale(currentTransformation, newScale, newScale);

    [[recognizer view] setTransform:newTransform];
    previousScale = [recognizer scale];
}

- (void)rotateImage:(UIRotationGestureRecognizer *)recognizer 
{
    if([recognizer state] == UIGestureRecognizerStateEnded) {


            previousRotation = 0.0;
            return;
        }

        CGFloat newRotation = 0.0 - (previousRotation - [recognizer rotation]);

        CGAffineTransform currentTransformation = [recognizer view].transform;
        CGAffineTransform newTransform = CGAffineTransformRotate(currentTransformation, newRotation);

        [[recognizer view] setTransform:newTransform];

        previousRotation = [recognizer rotation];
    }

Answer 1

您可以查看此http://www.raywenderlich.com/6567/uigesturerecognizer-tutorial-in-ios-5-pinches-pans-and-more

Answer 2

我相信你要找的是

-gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer:

Answer 3

以下是您要查找的代码...将此方法添加到.m文件中。

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    return YES;
}

如何平滑和旋转？

3 个答案: