navigation bar show black screen while switching
<p>I have hidden my navigation bar in my first UIViewController, now on click of one buttons, it gets pushed to another UIViewController in which the UINavigationController is not hidden.</p>

<p>Now when I pop my view from second view to first view, it shows the black screen where the UINavigationBar should be during switching. After that it appears at the accurate position. So please help me and bring me out of it.
Thanks in advance.</p>
