Is there a proper way to handle overlapping NSView siblings?

Question

I\'m working on a Cocoa application, and I\'ve run into a situation where I would like to have two NSView objects overlap. I have a parent NSView which contains two subviews

Answer 1

In order to ensure that NSView B always overlaps NSView A, make sure that you use the correct NSWindowOrderingMode when you are adding the subview:

[parentView addSubview:B positioned:NSWindowAbove relativeTo:A];

You should also keep in mind that the hidden portions of A will not be asked to redraw if view B is 100% opaque.

If you are moving the subviews, you also need to make sure that you call -setNeedsDisplayInRect: for for the areas of the view you are uncovering.