title: iPhone : Display popOver from tabBarItem
body: <p>I wonder how I can display a popOver from a tabBarItem ?
  Here is how I manage my tabBarController :</p>
  
  <pre><code>tabBarController = [[UITabBarController alloc] init];
  
  searchSplitViewController = [[UISplitViewController alloc] init];
  searchRoot = [[[EI_iPad_Home_Root_ViewController alloc] init] autorelease];
  searchDetail = [[[EI_iPad_Home_Detail_ViewController alloc] init] autorelease]; 
  searchRootNav = [[[EI_Navigation_ViewController alloc] initWithRootViewController:searchRoot]autorelease];
  searchDetailNav = [[[EI_Navigation_ViewController alloc] initWithRootViewController:searchDetail] autorelease];
  searchSplitViewController.viewControllers = [NSArray arrayWithObjects:searchRootNav, searchDetailNav, nil];
  searchSplitViewController.delegate = searchDetail;
  
  favoritesSplitViewController = [[UISplitViewController alloc] init];
  favoritesRoot = [[[EI_iPad_Favorites_Root_ViewController alloc] init] autorelease];
  favoritesDetail = [[[EI_iPad_Favorites_GeneralDetail_ViewController alloc] init] autorelease]; 
  favoritesRootNav = [[[EI_Navigation_ViewController alloc] initWithRootViewController:favoritesRoot]autorelease];
  favoritesDetailNav = [[[EI_Navigation_ViewController alloc] initWithRootViewController:favoritesDetail] autorelease];
  favoritesSplitViewController.viewControllers = [NSArray arrayWithObjects:favoritesRootNav, favoritesDetailNav, nil];
  favoritesSplitViewController.delegate = favoritesDetail;
  
  agencySplitViewController = [[UISplitViewController alloc] init];
  agencyRoot = [[[EI_iPad_Agency_Root_ViewController alloc] init] autorelease];
  agencyDetail = [[[EI_iPad_Agency_GeneralDetail_ViewController alloc] init] autorelease]; 
  agencyRootNav = [[[EI_Navigation_ViewController alloc] initWithRootViewController:agencyRoot]autorelease];
  agencyDetailNav = [[[EI_Navigation_ViewController alloc] initWithRootViewController:agencyDetail] autorelease];
  agencySplitViewController.viewControllers = [NSArray arrayWithObjects:agencyRootNav, agencyDetailNav, nil];
  agencySplitViewController.delegate = agencyDetail;
  
  editoSplitViewController = [[UISplitViewController alloc] init];
  editoRoot = [[[EI_iPad_News_Root_ViewController alloc] init] autorelease];
  editoDetail = [[[EI_iPad_News_Detail_ViewController alloc] init] autorelease]; 
  editoRootNav = [[[EI_Navigation_ViewController alloc] initWithRootViewController:editoRoot]autorelease];
  editoDetailNav = [[[EI_Navigation_ViewController alloc] initWithRootViewController:editoDetail] autorelease];
  editoSplitViewController.viewControllers = [NSArray arrayWithObjects:editoRootNav, editoDetailNav, nil];
  editoSplitViewController.delegate = editoDetail;
  
  searchSplitViewController.tabBarItem.title = NSLocalizedString(@"TabBar_search_label",nil);
  searchSplitViewController.tabBarItem.image = [UIImage imageNamed:@"tabBar_search_icon.png"];
  
  favoritesSplitViewController.tabBarItem.title = NSLocalizedString(@"TabBar_favorite_label",nil);
  favoritesSplitViewController.tabBarItem.image = [UIImage imageNamed:@"tabBar_favorite_icon.png"];
  
  agencySplitViewController.tabBarItem.title = NSLocalizedString(@"TabBar_agencies_label",nil);
  agencySplitViewController.tabBarItem.image = [UIImage imageNamed:@"tabBar_agencies_icon.png"];
  
  editoSplitViewController.tabBarItem.title = NSLocalizedString(@"TabBar_news_label",nil);
  editoSplitViewController.tabBarItem.image = [UIImage imageNamed:@"tabBar_news_icon.png"];
  
  tabBarController.viewControllers = [NSArray arrayWithObjects:searchSplitViewController,favoritesSplitViewController,agencySplitViewController,editoSplitViewController,nil];
  [window addSubview:[tabBarController view]];
  </code></pre>
  
  <p>I want to add a fifth item which will display a popover... any idea ? Thanks</p>