How to set unsafe area background color for ios 11

Question

Creating some new view controllers with xcode 9 so now I have a few safe areas to deal with.

I am currently trying to do something fullproof, meaning keeping the uns

Answer 1

    if #available(iOS 13.0, *) {
        let navBarAppearance = UINavigationBarAppearance()
        navBarAppearance.configureWithTransparentBackground()
        navBarAppearance.titleTextAttributes = [.foregroundColor: UIColor.white]
        navBarAppearance.largeTitleTextAttributes = [.foregroundColor: UIColor.white]
        navBarAppearance.backgroundColor = .black
        navigationController?.navigationBar.standardAppearance = navBarAppearance
        navigationController?.navigationBar.scrollEdgeAppearance = navBarAppearance
    }