Remove PreferredFocusedView tvOS

Question

I have a code in Objective C Working on AppleTV which I have used a PreferredFocusedView Constraints then I wonder how can I remove this constraints later without changing the view,

The Goal: I wanna remove the Buttons (in green and blue ) totally and not only remove the FocusGuid layout from the view on certain condition only happened when focusing on some other buttons.

Answer 1

The solution I have found is to use the new array UIFocuseEnvironment with tvOS 10.0 that make it easy for me

- (NSArray<id<UIFocusEnvironment>> *)preferredFocusEnvironments  //Called By [self setNeedsFocusUpdate]
{
    if (CONDITION)
    {
        return @[BUTTON1, BUTTON2];
    }
    else
    {
        return nil;
    }
}