Layering UIViews so that bottom most layer can be seen

Question

I have a UIView to which i add a background image. Then to that view i add a scroll view. To the scroll view i add some UIButtons.

I would like to be able to set the scroll view to be transparent (still being able to see the UIButtons) so that i can see the background image underneath it, so that it shows between the buttons.

I have tried setting the scrollview background to [UIColor clearColor] but this doesnt work.

Thanks.

Answer 1

In addition to setting the backgroundColor to [UIColor clearColor], you also have to set

scrollView.opaque = NO;

Answer 2

Change the UIScrollView.alpha level to 0.0f