How can I have an opaque UIView as a subview of a semi-transparent UIView?

Question

I have a UIView with an alpha of 0.5 which I add as a subview to my primary view in order to gray-out everything else. I want to add an additional UIView to this gray UIVie

Answer 1

Don't put it inside the semi-transparent view. Make it a sibling to semi-transparent view and put it over it using z-ordering.