RxSwift MVVM状态

Question

我将RxSwift与MVVM一起使用。我有一种情况，我加载了一个问题的屏幕。每个都由QuestionViewModel表示，其中包含问题，questionAnswer表示为Drivers。我遇到的问题是我想保存QuestionViewModels的答案，但只有当他们按下主屏幕上的保存按钮时才会这样。它很容易订阅，当一个问题被单独回答时，但这会按下每个按钮，而不是我想要一次保存，因为他们可以按下并想要取消。

struct ClientProfileViewModel { 
    private let service: Service
    private let client: Client?

    let questionnaire: Observable<Questionnaire>
    let answerViewModels: Observable<[QuestionViewModel]>

    init(service: Service, client: Client?) {
        self.service = service
        self.client = client

        self.questionnaire = self.service.questionnaire(client: client)

        self.answerViewModels = self.questionnaire.map { (questionnaire) -> [QuestionViewModel] in
            return questionnaire.questions.map { question in
                let answer = client?.answers.first(where: { (qa) -> Bool in
                    return qa.question.questionId == question.questionId
                }) ?? QuestionAnswer(question: question, answerYesNo: nil, answerText: nil)

                return QuestionViewModel(question: question, answer: answer)
            }
        }
    }
}


struct QuestionViewModel {
    private let question: Question
    private let answer: QuestionAnswer

    let questionOutput: Driver<Question>
    let answerOutput: Driver<QuestionAnswer>


    init(question: Question, answer: QuestionAnswer) {
        self.question = question
        self.answer = answer

        self.questionOutput = BehaviorRelay<Question>(value: self.question).asDriver()
        self.answerOutput = BehaviorRelay<QuestionAnswer>(value: self.answer).asDriver()
    }
}

有什么想法吗？