TabBarController

gistfile1.m

    PlaylistUITabBarController *tabBarController = [[PlaylistUITabBarController alloc] init];
    //playlist ^^ is the subclass of UITabBarController
    
    //these next two are just basic ViewControllers
    _futureTrackViewController = [[FutureTrackViewController alloc] initWithNibName:nil bundle:nil];
    _futureTrackViewController.delegate = self;
    _futureTrackViewController.tabBarController = tabBarController;
    
    _pastTrackViewController = [[PastTrackViewController alloc] initWithNibName:nil bundle:nil];
    _pastTrackViewController.delegate = self;
    _pastTrackViewController.tabBarController = tabBarController;
    
    tabBarController.viewControllers = @[_futureTrackViewController, _pastTrackViewController];
    tabBarController.tabBar.selectionIndicatorImage = [UIImage imageNamed:@"tab_bar_active"];
    tabBarController.tabBar.barStyle = UIBarStyleBlack;
    tabBarController.tabBar.backgroundImage = [UIImage new];
    tabBarController.tabBar.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"tab_bar_inactive"]];
    [tabBarController setSelectedIndex:0]; //this doesn't do anything
    
    //controller below here is a UINavigationController
    [_controller pushViewController:tabBarController animated:YES];