Word Wrap Test

class TextViewLabel: UITextView {

    override init(frame: CGRect, textContainer: NSTextContainer?) {
        super.init(frame: frame, textContainer: textContainer)
        commonInit()
    }

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        commonInit()
    }

    override func prepareForInterfaceBuilder() {
        super.prepareForInterfaceBuilder()
        commonInit()
    }
    func commonInit() -> Void {
        isScrollEnabled = false
        isEditable = false
        isSelectable = false
        textContainerInset = UIEdgeInsets.zero
        textContainer.lineFragmentPadding = 0
    }

}

class TextViewLabelTestVC: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let stack: UIStackView = {
            let v = UIStackView()
            v.axis = .vertical
            v.spacing = 8
            v.translatesAutoresizingMaskIntoConstraints = false
            return v
        }()

        let v1 = UILabel()
        let v2 = TextViewLabel()
        let v3 = UILabel()
        let v4 = TextViewLabel()

        [v1, v2, v3, v4].forEach { v in
            let lb = UILabel()
            lb.backgroundColor = UIColor(white: 0.95, alpha: 1.0)
            if let v = v as? UILabel {
                lb.text = "UILabel"
                v.backgroundColor = .cyan
                v.font = .systemFont(ofSize: 16.0)
                v.numberOfLines = 0
            }
            if let v = v as? TextViewLabel {
                lb.text = "Text View Label"
                v.backgroundColor = .green
                v.font = .systemFont(ofSize: 16.0)
            }
            stack.addArrangedSubview(lb)
            stack.addArrangedSubview(v)
        }

        stack.setCustomSpacing(32.0, after: v2)

        view.addSubview(stack)

        let g = view.safeAreaLayoutGuide
        NSLayoutConstraint.activate([

            stack.topAnchor.constraint(equalTo: g.topAnchor, constant: 40.0),
            stack.widthAnchor.constraint(equalToConstant: 255.0),
            stack.centerXAnchor.constraint(equalTo: g.centerXAnchor),

        ])

        var vs: String = "Does this string result in an orphan?"

        v1.text = vs
        v2.text = vs

        vs = "This string should wrap onto four lines of text. Compare the word wrap to see if TextKit allows the orphan."

        v3.text = vs
        v4.text = vs
    }
}