ios - maskToBounds 与 ClipsToBounds

Question

这个问题已经有答案了:

How is the relation between UIView's clipsToBounds and CALayer's masksToBounds? (2 个回答)

已关闭 6 年前。

从我的角度来看，UIView clipsToBounds和CAL层 masksToBounds做同样的工作。

我找不到它们之间的任何区别。

有人可以解释一下它们有何不同吗？

Answer 1

ma​​sksToBounds

Any sublayers of the layer that extend outside its boundaries will be clipped to those boundaries. Think of the layer, in that case, as a window onto its sublayers; anything outside the edges of the window will not be visible. When masksToBounds is NO, no clipping occurs.

When the value of this property is true, Core Animation creates an implicit clipping mask that matches the bounds of the layer and includes any corner radius effects. If a value for the mask property is also specified, the two masks are multiplied to get the final mask value.

您可以在API Reference获取更多信息.

clipToBounds

The use case for clipsToBounds is more for subviews which are partially outside the main view. For example, I have a (circular) subview on the edge of its parent (rectangular) UIView. If you set clipsToBounds to YES, only half the circle/subview will be shown. If set to NO, the whole circle will show up. Just encountered this so wanted to share

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