UIView的表现：removeFromSuperview VS hide [英] Performance of UIView: removeFromSuperview VS hide

问题描述

这个问题非常基本。从视图层次结构中删除 UIView 并隐藏 UIView ？

This question is really basic. What is the performance difference between removing a UIView from the view hierarchy and hiding a UIView?

我已经读过应该从视图层次结构中删除不需要的视图。我目前的情况是有时候可以看到 UIButton 。我什么时候隐藏 UIButton 什么时候从它的超级视图中删除它？

I have read that Views that are not needed should be removed from the view hierarchy. I currently have the situation that a UIButton should sometimes be visible. When do I hide the UIButton and when do I remove it from it's superview?

更改它是否很昂贵查看层次？

Is it expensive to change the view hierarchy?

推荐答案

如果您需要在显示和隐藏子视图之间切换，最好的方法肯定是隐藏它。对于 UIButton ，内存含义无论如何都不是那么好。如果您只是切换隐藏属性，代码肯定会更简单。

If you need to alternate between showing and hiding the subview, the best approach is definitely hiding it. For a UIButton the memory implications are not that great anyway. And the code is certainly simpler if you just switch the hidden property.

此外，您还可以获得额外的优势隐藏属性是可动画的！

Also, you get the additional advantage that the hidden property is animatable!

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