重置变形的UIView的原点会变成疯狂 [英] Resetting the origin of a transformed UIView descends into craziness

问题描述

我使用[UIView transform：]旋转/缩放UIVIew，这很有效。但是，一旦我更改视图的帧原点，即使我没有执行任何进一步的CGAffineTransforms，视图的内容也会开始奇怪地扩展。

I rotate/scale a UIVIew using [UIView transform:] and this works well. However, as soon as I change the view's frame origin the contents of the view begins to scale 'weirdly' even though I am not performing any further CGAffineTransforms.

为什么这样做发生？我该如何预防？

Why does this occur? How can I prevent it?

更新1：

文档建议变换后帧无效。我可以通过它的'center'属性移动视图吗？

The docs suggest that the frame is invalid after a transform. Can I move the view via it's 'center' property instead?

更新2：

设置视图中心确实允许我在应用转换后成功翻译视图。

Setting the views center did allow me to translate the view successfully after a transform had been applied.

推荐答案

我可以通过它的'center'属性移动视图吗？

Can I move the view via it's 'center' property instead?

文档定义了中心 property as：

The documentation defines the center property as:

框架的中心。

The center of the frame.

并说：

中心是在其超级视图的坐标系内指定的。

The center is specified within the coordinate system of its superview.

我试试。

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