ios - UIImageView 重新调整大小并同时旋转 UIImageView？

Question

我的 UIViewController 中有一个 UIImageView。我在上面设置了一个图像。我做了如下旋转。

- (void) runSpinAnimationOnView:(UIImageView*)view duration:(CGFloat)duration rotations:(CGFloat)rotations repeat:(float)repeat
{
    CABasicAnimation* rotationAnimation;
    rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
    rotationAnimation.toValue = [NSNumber numberWithFloat: M_PI * 2.0 /* full rotation*/ * rotations * duration ];
    rotationAnimation.duration = duration;
    rotationAnimation.cumulative = YES;
    rotationAnimation.repeatCount = repeat;

    [view.layer addAnimation:rotationAnimation forKey:@"rotationAnimation"];

}

我称之为

[self runSpinAnimationOnView:_imageView duration:1.0 rotations:360 repeat:1.0];

现在我也想调整相同的 ImageView 的大小，但从各个方面都具有相同的比例，我该怎么做。

简单地说，我想旋转 UIImageView 并同时调整它的大小。

谢谢

Answer 1

CGAffineTransformConcat 将达到您的目的，它将两个变换合二为一并制作为单个动画。试试这个。

[UIView animateWithDuration: 3.0f
                      delay: 0
                    options: (UIViewAnimationOptionCurveLinear | UIViewAnimationOptionAllowUserInteraction)
                 animations:^{

                     UIView *yourViewToBeAnimated = YourViewToBeSetHere;

                     CGAffineTransform animationToRotate = CGAffineTransformMakeRotation(45);

                     CGAffineTransform animationToScale = CGAffineTransformMakeScale(2, 2);//Double the size


                     yourViewToBeAnimated.transform = CGAffineTransformConcat(animationToScale, animationToRotate);


                 }
                 completion:^(BOOL finished) {




                 }
 ];