I'm developing a new application to ios and i'm using UINavigationController. When i'm developing in the Xcode the view is that:

But in the simulator (iOS 7) this is the result:

And when i use iOS 6 in the simulator, this is the result:

This is my code for use UINavigationController:
RootController *controller = [[RootController alloc]init];
UINavigationController *navController = [[UINavigationController alloc]initWithRootViewController:controller];
self.window.rootViewController = navController;
 
     
     
    