Как построить UI в коде? Какие преимущества/недостатки у данного подхода?ios-84

let label = UILabel()
label.translatesAutoresizingMaskIntoConstraints = false
label.text = "Hello, World!"
label.font = UIFont.systemFont(ofSize: 16, weight: .medium)
label.textColor = .darkText
view.addSubview(label)

NSLayoutConstraint.activate([
    label.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: 16),
    label.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20),
    label.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20)
])

class CustomButton: UIButton {
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupView()
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    private func setupView() {
        backgroundColor = .systemBlue
        layer.cornerRadius = 8
        setTitleColor(.white, for: .normal)
    }
}

label.snp.makeConstraints { make in
    make.top.equalTo(view.safeAreaLayoutGuide).offset(16)
    make.leading.trailing.equalToSuperview().inset(20)
}

let stackView = UIStackView(arrangedSubviews: [label, button])
stackView.axis = .vertical
stackView.spacing = 8

extension UIView {
    func padding(_ insets: UIEdgeInsets) -> UIView {
        let container = UIView()
        container.addSubview(self)
        // Настройка constraints с inset'ами
        return container
    }
}

extension UILabel {
    static func create(text: String, style: UIFont.TextStyle) -> UILabel {
        let label = UILabel()
        label.font = UIFont.preferredFont(forTextStyle: style)
        label.numberOfLines = 0
        return label
    }
}

enum ViewFactory {
    static func makeButton(title: String) -> UIButton {
        let button = UIButton(type: .system)
        button.setTitle(title, for: .normal)
        // Дополнительная настройка
        return button
    }
}

struct ViewState {
    let title: String
    let isEnabled: Bool
}

func updateViews(with state: ViewState) {
    label.text = state.title
    button.isEnabled = state.isEnabled
}