tvOS Bootcamp Detail Screen 4

DetailViewController4.swift

override func didUpdateFocus(in context: UIFocusUpdateContext, with coordinator: UIFocusAnimationCoordinator) {
    super.didUpdateFocus(in: context, with: coordinator)
    print("Previous focused item: \(String(describing: context.previouslyFocusedView)) \nNext focused item: \(String(describing: context.nextFocusedView)) \nFocus direction: \(context.focusHeading.rawValue)")
}