title: TabBar hides when calling a UIViewController
body: <p>I am new to iPhone programming. </p>
  
  <p>Current Setup:
  I have a TabBar Controller (4 TabBarItems).
  When you click on the secondTabBarOtem, it calls a second.xib which is of type UIViewController.</p>
  
  <p>My Requirement:
  I have a button inside the view.
  So when I click the button, it should load another UIViewController with the TabBar visible.</p>
  
  <p>Problem:
  I am able to do so, but the TabBar disappears and I need to restart the application to see the TabBar again.</p>