How to bind rx_tap (UIButton) to ViewModel?

Question

I have authorization controller with 2 UITextField properties and 1 UIButton. I want to bind my View to ViewModel but don\'t know how to to do it. This is my AuthorizatioVC.swi

Answer 1

The problem here is that you are trying to make your "viewModel" a class. It should be a function.

func viewModel(username: Observable, password: Observable, button: Observable) -> Observable {
    return button
        .withLatestFrom(Observable.combineLatest(login, password) { (login, password) })
        .flatMap { login, password in
            server.getAuthToken(withLogin: login, password: password)
        }
        .map { Auth(token: $0.token) }

Use set it up by doing this in your viewDidLoad:

let auth = viewModel(loginTxtField.rx_text, passwordTxtField.rx_text, button.rx_tap)

If you have multiple outputs for your view model, then it might be worth it to make a class (rather than returning a tuple from a function.) If you want to do that, then GithubSignupViewModel1 from the examples in the RxSwift repo is an excellent example of how to set it up.