我的UIViewController中有一个UI
ImageView.我在上面设置了一个图像.我已完成轮换,如下所示.
- (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];
现在我也希望调整相同的图像视图,但是从各方面都有相同的比例,我该怎么做.
简单地说,我想旋转UIImageView并同时调整它.
谢谢
最佳答案 简单地这样做,你可以根据需要按比例制作CGRectMake.它只是表明它将如何调整大小的方式.
- (void)rotateSpinningView
{
_imageView.frame = CGRectMake(_imageView.frame.origin.x+5,
_imageView.frame.origin.y+5,
_imageView.frame.size.width-10,
_imageView.frame.size.height-10);
_imageView.contentMode = UIViewContentModeScaleAspectFit;
_imageView.clipsToBounds = YES;
[UIView animateWithDuration:0.5 delay:0 options:UIViewAnimationOptionCurveLinear animations:^{
[_imageView setTransform:CGAffineTransformRotate(_imageView.transform, M_PI_2)];
} completion:^(BOOL finished) {
if (finished && !CGAffineTransformEqualToTransform(_imageView.transform, CGAffineTransformIdentity)) {
[self rotateSpinningView];
}
}];
}
- (IBAction)changeView:(UIButton *)sender {
[self rotateSpinningView];
}