Changing the viewcontroller's default view to new instance of uiview

Question

I want to change the default view of UIViewController with a new custom UIView intance but i got diffrent behavior for ios and tvos.

when i am adding new view to replace viewcontroller's view like this :

let viewcontroller: UIViewController!
let rootview:UIView!

viewcontroller = UIViewController ()

rootview = UIView (frame:viewcontroller.view.bounds)

viewcontroller.view = rootview

// Adding a button
let button = UIButton(type: .system)
button.setTitle("Tap Me", for: .normal)
button.titleLabel?.font = UIFont.systemFont(ofSize: 18)
button.addTarget(self, action: #selector(buttonTapped), for:.allEvents)

viewcontroller.view.addSubview(button)

For ios(iPhone/ipad) , i am able to get button click event . But in case of tvOS , i am not getting button click event.

But in case of tvOS if use the default view of viewcontroller like this , i am getting button click events and things works fine:

let viewcontroller: UIViewController!

viewcontroller = UIViewController ()

// Adding a button
let button = UIButton(type: .system)
button.setTitle("Tap Me", for: .normal)
button.titleLabel?.font = UIFont.systemFont(ofSize: 18)
button.addTarget(self, action: #selector(buttonTapped), for:.allEvents)

viewcontroller.view.addSubview(button)

Is this some bug for tvOS or for tvOS this suppose to happen this way ?

Answer 1

Directly setting a view controller's view is unsupported (except within the view controller's loadView method), so what you were doing was always wrong and you should have no expectations of its working on any platform.

The correct way to accomplish what you're attempting is to cover the existing view with another view (as its subview), which can either be a simple stand-alone view or can be the view of a different view controller which you configure as a child view controller of this one.