title: Navigation Items in UITableViewController are not appearing?
body: <p>I am displaying a UITableViewController inside of a UITabBarController that is being presented modally:</p>
  
  <pre><code>-(IBAction)arButtonClicked:(id)sender{
  
     //this is a uitableviewcontroller
      ARViewController* arViewController = [[[ARViewController alloc] initWithNibName:@"ARViewController" bundle:nil]autorelease];
  
      LeaderBoardTableViewController* lbViewController = [[[LeaderBoardTableViewController alloc] initWithNibName:@"LeaderBoardTableViewController" bundle:nil]autorelease];
      lbViewController.title = @"Leaderboard";
  
      arTabBarController = [[UITabBarController alloc] initWithNibName:nil bundle:nil];
      arTabBarController.viewControllers = [NSArray arrayWithObjects:arViewController, lbViewController, nil];
      arTabBarController.selectedViewController = arViewController;
  
      [self presentModalViewController:arTabBarController animated:YES];
  }
  </code></pre>
  
  <p>In my viewDidLoad for arViewController method I am setting the navigation items:</p>
  
  <pre><code>- (void)viewDidLoad {
      [super viewDidLoad];
  
      // Uncomment the following line to preserve selection between presentations.
      self.clearsSelectionOnViewWillAppear = NO;
      self.title = @"AR";
  
      leaderBoardButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemOrganize 
                                                                    target:self 
                                                                    action:@selector(leaderBoardButtonClicked:)];
  
      self.navigationItem.rightBarButtonItem = leaderBoardButton;
  
  }
  </code></pre>
  
  <p>My navigation bar doesn't appear when it is inside of the UITabBarController, but when I push the view itself I am able to see it.</p>
  
  <p>What am I missing?</p>