Performance of UIView: removeFromSuperview VS hide
ios, subview, uiview
Solution
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.
Also, you get the additional advantage that the `hidden` property is animatable!
Problem
This question is really basic. What is the performance difference between removing a `UIView` from the view hierarchy and hiding a `UIView`? 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? Is it expensive to change the view hierarchy?