iPhone - animating a view controller presentation
<p>I have a UINavigationControl and I would like to present a view controller pushing it from the top and removing it from the view pushing it to the top.</p>

<p>Is there a way to change the default animation used when you call</p>

<pre><code>[self.navigationController pushViewController:myViewController animated:YES];
</code></pre>

<p>to another animation instead of pushing right to left or do I have to animate it myself?</p>

<p>In the second case, how do I do that?</p>

<p>thanks.</p>
