Seems like a better fit for a nav bar (at least if you are keeping with the spirit of what you are doing: IE adding a title to the bottom of the screen)
Anyway I created a simple test project and this is what I did to get the functionality pictured, you may have to insert it into the view/controller differently but it gets what you want relatively easy and doesn't use the button bar
- (void)viewDidLoad {
[super viewDidLoad];
UINavigationBar *navBar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height - 44, 320, 44)];
[navBar setBarStyle:UIBarStyleBlack];
UINavigationItem *title = [[UINavigationItem alloc] initWithTitle:@"Your Title"];
NSArray *array = [[NSArray alloc] initWithObjects:title, nil];
[navBar setItems:array];
[self.view addSubview:navBar];
}