I have been following reactive swift recently to realise it's functionality. This is the playground info that is currently available.
What i am facing the problem is how to connect the view model with the UI element in order to monitor their values.
What I have tried is to emulate a simple login screen with two textfields and a button. What I aim to do is monitor the i/p from these two textfields and the button state will be changed based on that.
This is the view model
import Foundation
import ReactiveSwift
class LoginViewModel {
/*
* A property, represented by the PropertyProtocol, stores a value and notifies observers about future changes to that value. A validating protocol is nothing but a property that needs to be validated ( the validation is a lambda function)
*/
let email: ValidatingProperty<String, Error>
let password : ValidatingProperty<String,Error>
init() {
email = ValidatingProperty("") { input in
if (input.isEmpty == true || (input.isEmpty && input.isValidEmail() == false)){
return .invalid(CustomError.init(title: nil, description: "Improper Email", code: 001))
}
return .valid
}
password = ValidatingProperty("") { input in
if (input.isEmpty == true || (input.isEmpty && input.isValidPassword() == false)){
return .invalid(CustomError.init(title: nil, description: "Kindly please provide a password", code: 002))
}else {
return .valid
}
}
}
}
This is the ViewController
class ViewController: UIViewController {
@IBOutlet weak var emailField: UITextField! // Observable. Signal
@IBOutlet weak var passwordField: UITextField! // Observable. Signal
@IBOutlet weak var submitBtn: UIButton!
var viewModel: LoginViewModel!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
viewModel = LoginViewModel()
}
}
When I try to follow the playground's code {code} viewModel.email <~ formView.emailField.reactive .continuousTextValues.skipNil(){code} into my Sample code, it gives me an error stating that Value of type 'UITextField?' has no member 'reactive'. I added the helper functions available, emailField doesn't have a category for reactive, it's the other way around.
