Is automatic view creation mandatory when initializing a controller?

Automatic creation of a view during controller initialization in iOS is not mandatory. In UIKit, controllers typically load their views from xib files, storyboards, or create them programmatically. If you use UIViewController and do not override the loadView method, the system will automatically create an empty view for the controller. However, if you want to have full control over view creation, you can override loadView and create the view manually.

Example of overriding loadView:

class MyViewController: UIViewController {
    override func loadView() {
        let customView = UIView()
        customView.backgroundColor = .white
        self.view = customView
    }
}

Thus, automatic view creation occurs by default, but you can control it and create the view manually if needed.