final class FormViewController: UIViewController {

    @Published var isSubmitAllowed: Bool = false
    private var switchSubscriber: AnyCancellable?

    @IBOutlet private weak var acceptTermsSwitch: UISwitch!
    @IBOutlet private weak var submitButton: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()
        switchSubscriber = $isSubmitAllowed.receive(on: DispatchQueue.main).assign(to: \.isEnabled, on: submitButton)
    }

    @IBAction func didSwitch(_ sender: UISwitch) {
        isSubmitAllowed = sender.isOn
    }
}