如果创建CALayer而不是UIView，那么对内存有多大影响？

Question

虽然UIView的内存占用量至少为4 *宽*高像素，但我不知道仅创建CALayer时的外观。

Answer 1

过去对此进行了一些实验，我发现UIView对象的额外开销非常小。

Answer 2

While an UIView has a memory footprint of at least 4 * width * height pixels

This statement is absolutely not true. The memory overhead of a UIView (compared to a CALayer) is just the size of the instance variables of the UIView class, plus a few instances of additional classes that will get allocated. The UIView instance variables take up about 24 bytes, and the additional data storage is probably the same, or less.

If UIView adds functionality that's useful for your application, then use it. The memory overhead is really of no concern.