Alamofire编码与struct的问题

Question

我有一个相当复杂的结构进行编码，以便将其传递给我的帖子。

case .sendData(let parameters):
    urlRequest = try Alamofire.JSONEncoding.default.encode(urlRequest, withJSONObject: parameters.encode())

参数不是[String：Any]类型，而是类型＆＃39; QuestionnaireAnswers＆＃39;这是一个结构。所以我需要创建编码功能。我尝试了下面的代码，但它失败了

struct ItemResponse {
    let question: String
    let answerArray: [String]
}

// MARK: Encodable
extension ItemResponse {
    func encode() -> [String: Any] {
        return [
            "question": question,
            "answerArray": answerArray
        ]
    }
}

struct QuestionnaireAnswers{
    let version: Int
    var answers: [ItemResponse]
}


// MARK: Encodable
extension QuestionnaireAnswers {
    func encode() -> [String: Any] {
        return [
            "version": version,
            "answers": answers
        ]
    }
}

最后，JSON应如下所示：

{
    version: 1,
    answers: [
      { question: 'dog', answerArray: ['yay'] },
      { question: 'cat', answerArray: ['< 500'] },
      { question: 'tree', answerArray: ['sorry', 'OK then','NotWorking'] },
    ],
  }