问题描述
我将 CATransform3D
应用于视图。
我的意思是我应用了一个复杂的变换:旋转,平移,缩放和透视。我需要找到近似最小矩形。我需要它,因为此视图已添加到 UIScrollView
(要知道我需要的 contentSize
,当然也要实现 scrollToItem :)
I mean I applied a complex transform: rotation, translation, scale and perspective. And I need to find something like approximate minimal rect. I need it because this view is added to UIScrollView
(to know the contentSize
I need and of course to implement "scrollToItem:")
推荐答案
如果您想完全获得 CGRect
包含此转换后的视图,可以使用 convertRect:toView:
。例如:
If you want to get the CGRect
that completely contains this transformed view, you can use convertRect:toView:
. For example:
CGRect rect = [viewWithTransforms convertRect:viewWithTransforms.bounds toView:self.view];
例如,灰色视图是某些转换后的 UIView
,黑色边框是 convertRect:toView:
的结果,如上所示:
For example, the gray view is some transformed UIView
, and the black border is the result of convertRect:toView:
shown above:
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