json - 使用 Codeable 从 JSON 中提取数据很困难

Question

我正在尝试从下面的 JSON 中提取“数据”:

{
  "result": "success",
  "code": 200,
  "version": "1",
  "time": 1,
  "id": "NODATA",
  "data": {
    "user_address_town": {
      "label": "town",
      "required": true,
      "type": "string",
      "value": ""
    },
    "user_address_county": {
      "label": "county",
      "required": true,
      "type": "string"
    },
    "user_address_line_1": {
      "label": "address 1",
      "required": true,
      "type": "string",
      "value": ""
    },
    "user_address_line_2": {
      "label": "address 2",
      "required": false,
      "type": "string",
      "value": ""
    },
    "user_address_line_3": {
      "label": "address 3",
      "required": false,
      "type": "string",
      "value": ""
    },
    "user_address_postcode": {
      "label": "postcode",
      "required": false,
      "type": "string",
      "value": ""
    },
    "user_address_identifier": {
      "label": "identifier",
      "required": false,
      "type": "string",
      "value": ""
    },
    "stage": "stage1",
    "last": true,
    "ekyc": true,
    "email": {
      "label": "email address",
      "required": true,
      "type": "email",
      "value": "<a href="https://stackoverflow.com/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="8df9e8fef9a6bcb8cde0ece4e1e4e3ecf9e2ffa3eee2e0" rel="noreferrer noopener nofollow">[email protected]</a>"
    },
    "password": {
      "label": "password",
      "required": true,
      "type": "string"
    },
    "user_title": {
      "label": "title",
      "required": true,
      "type": "string",
      "value": "Mrs"
    },
    "user_first_name": {
      "label": "first name",
      "required": true,
      "type": "string",
      "value": "jsns"
    },
    "user_last_name": {
      "label": "last name",
      "required": true,
      "type": "string",
      "value": "nsm"
    },
    "user_dob": {
      "label": "user date of birth",
      "type": "date",
      "required": true,
      "value": "2001-01-22"
    },
    "user_gender": {
      "label": "gender",
      "type": "string",
      "required": false,
      "value": "M"
    },
    "user_country": {
      "label": "country",
      "required": true,
      "type": "integer",
      "value": "1"
    },
    "user_telephone": {
      "label": "telephone",
      "required": false,
      "type": "string",
      "value": "946464646"
    },
    "user_name_on_card": {
      "label": "card name",
      "required": false,
      "type": "string"
    }
  }
}

我创建了一个名为 IncompleteSignupResponse 的结构，该结构在解码时应包含 “data” 对象中的所有数据。 userObject 数组用于数据内较小的对象，例如user_address_town。

以下是我正在使用的结构:

struct IncompleteSignupResponse {
    let stage: String
    let last: Bool
    let ekyc: Bool
    let error: String?
    let userObject: [IncompleteUserObjectResponse]

}

struct IncompleteUserObjectResponse: Codable {
    let label: String
    let required: Bool
    let type: String
    let value: String
}

extension IncompleteSignupResponse: Codable {

    private enum IncompleteSignupResponseAPIResponseCodingKeys: String, CodingKey {
        case data = "data"
    }

    init(from decoder: Decoder) throws {
        let container = try decoder.container(keyedBy: IncompleteSignupResponseAPIResponseCodingKeys.self)
        let data = try container.decode(IncompleteSignupResponse.self, forKey: .data)
        stage = data.stage
        last = data.last
        ekyc = data.ekyc
        error = data.error
        userObject = data.userObject
    }
}

尝试解码该结构会给出以下响应:

keyNotFound(IncompleteSignupResponseAPIResponseCodingKeys(stringValue: "data", intValue: nil), Swift.DecodingError.Context(codingPath: [IncompleteSignupResponseAPIResponseCodingKeys(stringValue: "data", intValue: nil)], debugDescription: "No value associated with key IncompleteSignupResponseAPIResponseCodingKeys(stringValue: \"data\", intValue: nil) (\"data\").", underlyingError: nil))

我不太确定为什么找不到关键数据，因为它没有嵌套在任何内容中..

有什么我错过的吗？另外，我的布局是否被认为是良好的做法，或者是否有可以改进的地方。

Answer 1

使用本网站:JSONParser .您可以在代码中使用此结构:

struct Welcome: Codable {
   let result: String
   let code: Int
   let version: String
   let time: Int
   let id: String
   let data: DataClass
}

struct DataClass: Codable {
     let userAddressTown, userAddressCounty, userAddressLine1, userAddressLine2: Email
     let userAddressLine3, userAddressPostcode, userAddressIdentifier: Email
     let stage: String
     let last, ekyc: Bool
     let email, password, userTitle, userFirstName: Email
     let userLastName, userDob, userGender, userCountry: Email
     let userTelephone, userNameOnCard: Email

    enum CodingKeys: String, CodingKey {
       case userAddressTown = "user_address_town"
       case userAddressCounty = "user_address_county"
       case userAddressLine1 = "user_address_line_1"
       case userAddressLine2 = "user_address_line_2"
       case userAddressLine3 = "user_address_line_3"
       case userAddressPostcode = "user_address_postcode"
       case userAddressIdentifier = "user_address_identifier"
       case stage, last, ekyc, email, password
       case userTitle = "user_title"
       case userFirstName = "user_first_name"
       case userLastName = "user_last_name"
       case userDob = "user_dob"
       case userGender = "user_gender"
       case userCountry = "user_country"
       case userTelephone = "user_telephone"
       case userNameOnCard = "user_name_on_card"
    }
}

struct Email: Codable {
   let label: String
   let emailRequired: Bool
   let type: TypeEnum
   let value: String?

   enum CodingKeys: String, CodingKey {
       case label
       case emailRequired = "required"
       case type, value
   }
}

enum TypeEnum: String, Codable {
   case date = "date"
   case email = "email"
   case integer = "integer"
   case string = "string"
}