iphone - 当我在 CGAffineTransformMakeScale 动画中设置 UIImageView 的框架时出现奇怪的行为

发布于 2024-11-26 10:58:29 字数 808 浏览 1 评论 0原文

我有一个 UIImageView 显示带有 UIViewContentModeScaleAspectFill 的 contentMode 的图像。

然后我将 CGAffineTransformMakeScale 的动画（大约 30 秒）与 UIImageView 关联起来。

imageView.transform = CGAffineTransformMakeScale(1,1);
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:30];
imageView.transform = CGAffineTransformMakeScale(1.9,1.9);
[UIView commitAnimations];

30秒后，当一轮动画完成时，我将向imageView设置另一个图像并重新启动动画。

一切都很好。但是当我尝试旋转 UIImageView 以适应用户对设备方向的选择时，它变得有线。

当用户要更改方向时，我将 UIImageView 的框架相应地设置为 CGRectMake(0, 0, 768, 1004) 或 CGRectMake (0, 0, 1024, 748)。

奇怪的是：

如果UIImageView的frame在动画的时候改变了，也没有问题。但是当下一个图像到来并开始新一轮动画时，UIImageView突然在屏幕中心变小（应该是全屏），然后放大动画照常开始，只是不再全屏了。

谁能告诉我如何在 UIImageView 进行变换时控制框架或方向？

因为我猜这就是出错的地方。

谢谢

原文

I have a UIImageView showing an image with the contentMode of UIViewContentModeScaleAspectFill.

Then I am associating a animation (about 30 seconds) of CGAffineTransformMakeScale with the UIImageView.

imageView.transform = CGAffineTransformMakeScale(1,1);
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:30];
imageView.transform = CGAffineTransformMakeScale(1.9,1.9);
[UIView commitAnimations];

After 30 seconds, when a round of animation is done, I will set another image to the imageView and restart the animation.

Everything is fine. But when I try to rotate the UIImageView to adapt user's selection of device orientation, it becomes wired.

When the user is about to change the orientation, I set the UIImageView's frame to CGRectMake(0, 0, 768, 1004) or CGRectMake (0, 0, 1024, 748), accordingly.

The strange thing is:

if the frame of UIImageView is changed while the animation, it is fine. But when the next image comes and starts a new round of animation, the UIImageView suddenly became small in the center of screen (is supposed to be full screen) and then the animation of zoom-in started as usual, just not full screen any more.

Can anyone tell me how to control the frame or orientation while the UIImageView has a transform with it?

Because I guess this is where it went wrong.

Thanks

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