how to make a custom viewController with transparent black background?
<p>I'm trying to make a viewController appears like the small one in the middle of the picture :</p>

<p><img src="http://i.stack.imgur.com/0ZAiL.jpg" alt="custom viewcontroller "></p>

<p>I tried with the UiAlertView, but it semms not offering this feature.</p>

<p>I found some apps adding buttons and labels, photo in similar viewControllers.</p>

<p>Any idea ?</p>
