UIViewController trying to present modally
<p>Trying to present UIViewController modally but it is working with only pushviewconttoller statement only.</p>

<pre><code> [navigationController pushViewController:_viewController animated:YES];
</code></pre>

<p>With presentModalViewController statement it shows only navigationbar that is it not done button not even UIView</p>

<pre><code>[navigationController presentModalViewController:self.viewController animated:YES];
</code></pre>

<p>Why is that?</p>
