title: How to show and hide tab bar at required places?
body: <p>Hi i am making an application where ther are four screens(view controllers) from 1 to 4. I want to show screen 1 without tab bar .This screen will have three buttons through which user can navigate to other screens. Now when user taps screen 2 button then user should navigate to screen 2 with tab bar on bottom.Now this tab bar will have four tabs from screen 1 to 4 to navigate .Similarly when now user tap on tab 1 then the scrren 1 should arrive which is without tab bar and so on.
        My problem is i am not able to load or unload tab bar at required places.I have tried following:</p>
  
  <ol>
  <li>I opened screen 1 on statrt up and on screen 1's view did load added the tab bar but it didnt work</li>
  <li><p>I added tab bar on main window but then tab bar starts to show even on screen 1.</p>
  
  <p>PLease tell me the correct way to do this (In other words a tab bar with four tabs in which the first screen should not show tab bar)</p></li>
  </ol>
  
  <p>Thanks in advance</p>