How can I get a specific button running on tvOS (AppleTV) to take focus? (Objective C)

Question

The project have some views with different buttons. When I hide a view and show the other view, I can't get the focus on my button.

I think is related to setNeedsFocusUpdate. I have read the Apple doc. There is not any example.

Does anyone know how to do it and put an example (Objective C)?

Answer 1

You need to override preferredFocusedView, and when you are hiding one view and showing there call this method setNeedsFocusUpdate, your preferredFocusedView implementation should be something like this

- (UIView *)preferredFocusedView
{
    // Add your logic here, it could be more complicated then what is below
    if (view1.hidden)
    {
        return _button;
    }
    else 
    {
        return _button2
    }
}

And if you want to make custom view get focus, override canBecomeFocused method and return true

Edit

You can use add a breakpoint and execute this command po [buttonYouWantToFocus _whyIsThisViewNotFocusable] it will tell you why its not focusable.