title: How to hide an iPhone Tab Bar?
body: <p>I have a small multiview app. It consists of a <code>UITabBarController</code> with a nav controller in each tab. What I want is to show a <code>UIImageView</code> when a user shakes the device. After I've implemented the loading of the <code>UIImageView</code>, I faced a problem-the image was only 2/3 of the screen because of the tab and nav bars. I managed to hide the nav bar but I'm still stuck with the tab bar. I tried many solutions such as <code>[tabBar setHidden: YES];</code> but I get errors "tabBar undeclared", although I've imported the AppDelegate, where the tabBar was defined.</p>
  
  <p>Thanks in advance!</p>