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Asked: 2026-05-25T10:37:47+00:00

I understand that view controllers help control multiple views in an application, but I

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I understand that view controllers help control multiple views in an application, but I have trouble understanding when to use them.

If I have an application with a main page, several views with a “hierarchy” structure, and an about page not connected with the hierarchy, what files should my application have? An appdelegate, navigation controller and view controller? More than one view controller? Just a navigation controller?

Also, should they all be contained in one .xib file, or multiple .xib files?

Any help would be greatly appreciated.

Thanks.

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1 Answer

  1. Editorial Team

    A good habit is to have a UIViewController for each page you want to show. If I get the structure of your app you should have a main page (with many other UIViews inside it) and another page (about page). If that’s true I suggest two UIViewControllers.

    The UINavigationController is a subclass of UIViewController that lets you “navigate” among the pages. It’s not strictly necessary but suggested (you can also implement your self a custom navigation system, but it’s easier to exploit the one Apple offers you). Another navigation system is the one based on UITabBarController, if you want to take a look.

    Assuming I get the structure of your app you should need two .xib file, one for each page you have.

    The app delegate is conceptually different from a view controller, you’ll have just a single app delegate, automatically created by Xcode (you can, of course, modify it to fit your needs).

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