How to use UITabarViewController in Xcode - OBjectiveC?

my code:

UIView *screen=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];
screen.backgroundColor=[UIColor grayColor];
UIView *screen2=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 480)];
screen.backgroundColor=[UIColor redColor];
screen2.backgroundColor=[UIColor greenColor];

UITabBarController *tab=[[UITabBarController alloc]init];
[tab setViewControllers:[NSArray arrayWithObjects:screen,screen2, nil]];


but when I run it has Exception at: [[tab setViewControllers:[NSArray arrayWithObjects:screen,screen2, nil]];

Can anybode tell me why?, i'm beginner Thanks


You are adding UIView to your tabbar view controllers. You should add view controllers like UIViewControllers. this shows how you can add uitabbarcontroller programatically link

a UITabBarController viewControllers property is an array of UIViewController's not UIViews, you need to initialise the array with view controllers instead of views

The view controller programming guide is a good place to start reading about this

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