class LightDarkVC: UIViewController {
	
	override func viewDidLoad() {
		super.viewDidLoad()
		
		let stack = UIStackView()
		stack.axis = .vertical
		stack.spacing = 20
		
		stack.translatesAutoresizingMaskIntoConstraints = false
		view.addSubview(stack)
		
		let g = view.safeAreaLayoutGuide
		NSLayoutConstraint.activate([
			stack.topAnchor.constraint(equalTo: g.topAnchor, constant: 40.0),
			stack.leadingAnchor.constraint(equalTo: g.leadingAnchor, constant: 40.0),
			stack.trailingAnchor.constraint(equalTo: g.trailingAnchor, constant: -40.0),
		])

		let font: UIFont = .systemFont(ofSize: 24.0, weight: .bold)
		var v: UILabel!
		
		v = UILabel()
		v.text = "Default"
		v.textAlignment = .center
		v.font = font
		stack.addArrangedSubview(v)

		v = UILabel()
		v.text = "Always Light"
		v.textAlignment = .center
		v.overrideUserInterfaceStyle = .light
		v.font = font
		stack.addArrangedSubview(v)
		
		v = UILabel()
		v.text = "Always Dark"
		v.textAlignment = .center
		v.overrideUserInterfaceStyle = .dark
		v.font = font
		stack.addArrangedSubview(v)
		
		v = UILabel()
		v.text = "Explicit Colors\nWhite Background\nBlack .textColor"
		v.textAlignment = .center
		v.numberOfLines = 0
		v.backgroundColor = .white
		v.textColor = .black
		v.font = font
		stack.addArrangedSubview(v)
		
	}
	
}