I have an app where I am trying to implement RxSwift using MVVM.
I have the SignInViewModel where I am doing the validation and I am updating the login observable with the rest response boolean that I am listening to .
In the controller class when ever the validations pass the login button gets enabled.
In a similar manner I want to be able to start a spinner on click of the button and dismiss when the user receives a response.
When I try to listen to the loginObservable in from view model in the controller class. it does not hit the bind block.
I am not able to figure out what the problem is.
Any help will be appreciated
Following is my SignInViewModel
class SignInViewModel {
let validatedEmail: Observable<Bool>
let validatedPassword: Observable<Bool>
let loginEnabled: Observable<Bool>
let loginObservable: Observable<Bool>
init(username: Observable<String>,
password: Observable<String>,
loginTap: Observable<Void>) {
self.validatedEmail = username
.map { $0.characters.count >= 5 }
.shareReplay(1)
self.validatedPassword = password
.map { $0.characters.count >= 2 }
.shareReplay(1)
self.loginEnabled = Observable.combineLatest(validatedEmail, validatedPassword ) { $0 && $1 }
let userAndPassword = Observable.combineLatest(username, password) {($0,$1)}
self.loginObservable = loginTap.withLatestFrom(userAndPassword).flatMapLatest{ (username, password) in
return RestService.login(username: username, password: password).observeOn(MainScheduler.instance)
}
}
}
Following is the moyaRequest class
final class MoyaRequest{
func signIn(userData: Creator) -> Observable<Response> {
return provider.request(.signIn(userData))
.filter(statusCode: 200)
}
}
Following is my RestService class
class RestService:NSObject {
static var moyaRequest = MoyaRequest()
static var disposeBag = DisposeBag()
static func login(username: String, password: String) -> Observable<Bool> {
let userData = Creator()
userData?.username = username
userData?.password = password
print("Username password", userData?.username, userData?.password)
return Observable.create { observer in moyaRequest.signIn(userData: userData!).subscribe{ event -> Void in
switch event {
case .next(let response):
print("Response",response)
case .error(let error):
let moyaError: MoyaError? = error as? MoyaError
let response: Response? = moyaError?.response
let statusCode: Int? = response?.statusCode
print("Sample Response code error" + String(describing: statusCode))
default:
break
}
}
return Disposables.create()
}
}
}
I am trying to bind the view model in the controller class.
class SignInViewController: UIViewController{
let disposeBag = DisposeBag()
@IBOutlet weak var passwordTextfield: UITextField!
@IBOutlet weak var usernameTextfield: UITextField!
private var viewModel : SignInViewModel!
@IBOutlet weak var signInButton: UIButton!
override func viewDidLoad() {
setUpRxViewModel()
}
func setUpRxViewModel(){
self.viewModel = SignInViewModel(username: self.usernameTextfield.rx.text.orEmpty.asObservable(),
password: self.passwordTextfield.rx.text.orEmpty.asObservable(),
loginTap: self.signInButton.rx.tap.asObservable())
self.viewModel.loginEnabled.bind{ valid in
self.signInButton.isEnabled = valid
}.addDisposableTo(disposeBag)
self.viewModel.loginObservable.bind{ input in
print("Login Clicked")
}.addDisposableTo(disposeBag)
}
}
