iOS6/iOS 7 UIView transparency

Question

So I have a game application, it has answer screen. Answer screen has 0.9 alpha and answer button has 1.0f. You can see on screenshot.

The same on iOS 7

Button alpha is still 1.0, but it looks transparent. If I do background view alpha 1.0 it works on iOS 7, but I extremely need user to see background under the view.

Please help.

Answer 1

for the view that is semi-transparent set the alpha this way:

UIView *view.backgroundColor=[[UIColor whiteColor] colorWithAlphaComponent:.6];

not:

UIView *view.backgroundColor=[UIColor whiteColor];    
view.alpha=.6;