iPhone development - how can I implement transparent overlay view?
<p>I'm now working with view-based application. It's just simple. If I touch the view, the view flips using animation ability of UIView. This is all.</p>

<p>What I want to do after this...is...locating a kind of button in the middle of the main view. BUT!, the button must not be animated while the main view is flipping.</p>

<p>How do I do this?</p>
