我不得不将旋转应用于 parentView ，然后设置 parentView 和 childView 的bounds属性以调整其大小。然后，我能够成功地在 drawRect 中重新绘制 childView 。最重要的是，虽然我认为如果您对子级超级视图设置了转换，但我认为您不得不在子视图中使用它。我尝试单独设置转换，并且转换的所有时间都搞砸了。在某些情况下，来自布伦特的上述情况也可能派上用场。

I had to apply the rotation to the parentView, and then set the bounds property of parentView and childView to resize it. Then I was able to redraw the childView in drawRect successfully. Bottom line is though I think if you set a transform on a childs superview, I think you're stuck having to live with it in its subviews. I tried setting the transforms separately and all of the timing of the transforms got screwed up. The above situation from Brent might also come in handy for certain situations.