iOS how to make subview of a transparent view opaque?

Question

I have a view as the subview of another view, then I set the alpha value of the father view something like 0.5, but this also makes the subview transparent even when its alpha value is set to 1. So how can I make the subview non-transparent(opaque) when its father view has an alpha value less than 1?

Answer 1

The closest you're going to get is colorWithAlphaComponent:. Using something like the following, you can set the alpha component of the parent view's background, and it won't affect subviews.

[yourSuperview setBackgroundColor:[[UIColor blackColor] colorWithAlphaComponent:0.5]];

Answer 2

The following method worked for me.

superView.backgroundColor = .clear

Now that alpha property of superview is not altered, it won't affect the alpha of its subview. Hence, subviews will be opaque(if you have a background color for it).