RxSwift: How can I change Bool to ObservableType?

Question

I am new to RxSwift and I want to achieve this:

A titleTextField,a descTextField,a confirmButton and a submitButton.

The submitButton is unEnable until titleTextField and descTextField's text.count >= 5 and confirmButton is selected, so I write these code:

let titleValid = titleTextField.rx.text.orEmpty.map { (text) -> Bool in
    return text.count >= 5
}

let descValid = descTextField.rx.text.orEmpty.map { (text) -> Bool in
    return text.count >= 5
}

let isConfirm = confirmButton.rx.isSelected.asObserver().mapObserver { (selected) -> Bool in
    return selected
}

Observable.combineLatest(titleValid, descValid, isConfirm) { $0 && $1 && $2 }.bind(to: submitButton.rx.isEnabled).disposed(by: disposeBag)

It's work good with titleValid and descValid,however,there is an error with isConfirm:

Argument type 'AnyObserver<Bool>' does not conform to expected type 'ObservableType'

How can I change isConfirm to ObservableType? How to Correct it?

Note the RxSwift's version is 5.0.0

Answer 1

The comments contains your answer. It's the tapping of the confirmButton that's important.

let titleValid = titleTextField.rx.text.orEmpty.map { (text) -> Bool in
    return text.count >= 5
}

let descValid = descTextField.rx.text.orEmpty.map { (text) -> Bool in
    return text.count >= 5
}

let isConfirm = confirmButton.rx.tap
    .scan(false) { current, _ in !current }
    .startWith(false)

isConfirm
    .bind(to: confirmButton.rx.isSelected)
    .disposed(by: disposeBag)

Observable.combineLatest(titleValid, descValid, isConfirm) { $0 && $1 && $2 }
    .bind(to: submitButton.rx.isEnabled)
    .disposed(by: disposeBag)