Must I do anything special in order to show a modal view controller?
<p>I have a UIViewController as root vc, attached to the window. Then I simply created another VC and want it to appear modally. When I add this directly to the rootViewController, it is visible. But when I call </p>

<pre><code>- (void)presentModalViewController:(UIViewController *)modalViewController animated:(BOOL)animated
</code></pre>

<p>nothing happens.</p>
