UIView transparency shows how the sausages are made!
- by quixoto
I have a UIView container that has two UIImageViews inside it, one partially obscuring the other (they're being composed like this to allow for occasional animation of one "layer" or another.
Sometimes I want to make this container 50% alpha, so what the users sees fades. Here's the problem: setting my container view to 50% alpha makes all my subviews inherit this as well, and now you can see through the first subview into the second, which in my application has a weird X-Ray effect that I'm not looking for.
What I'm after, of course, is for what the user currently sees to become 50% transparent-- the equivalent of flattening the visible view into one bitmap, and then making that 50% alpha.
What are my best bets for accomplishing this? Ideally would like to avoid actually, dynamically flattening the views if I can help it, but best practices on that welcome as well. Am I missing something obvious? Since most views have subviews and would run into this issue, I feel like there's some obvious solution here.
Thanks!
