可编码以动态键解析JSON

Question

我正在尝试解析以下具有多个动态键的JSON响应，

{
"Nagaland": {
    "districtData": {
      "Dimapur": {
        "confirmed": 1,
        "lastupdatedtime": "",
        "delta": {
          "confirmed": 0
        }
      }
    }
  },
  "Meghalaya": {
    "districtData": {
      "East Khasi Hills": {
        "confirmed": 1,
        "lastupdatedtime": "",
        "delta": {
          "confirmed": 0
        }
      }
    }
  }
}

我已经像下面那样编写了我的Codable结构，

struct IndianStateListModel: Codable {
    // MARK: Properties
    let state: [String: StateData]
}

struct StateData: Codable {
    // MARK: Properties
    var districtData: Inner?

    /// Mapping Key Enum
    private enum CodingKeys: String, CodingKey {
        case districtData
    }
}

struct Inner: Codable {
    // MARK: Properties
    let districts: [String: DistrictData]
}


struct DistrictData: Codable {
    // MARK: Properties
    var confirmed: Int?
    var lastupdatedtime: String?
    var delta: DailyConfirmedData?

    /// Mapping Key Enum
    private enum CodingKeys: String, CodingKey {
        case confirmed, lastupdatedtime, delta
    }
}

struct DailyConfirmedData: Codable {
    // MARK: Properties
    var confirmed: Int?

    /// Mapping Key Enum
    private enum CodingKeys: String, CodingKey {
        case confirmed
    }
}

称为，

let summary = try JSONDecoder().decode(IndianStateListModel.self, from: data)

但是返回nil

P.S .：有关可解码的Swift Codable with dynamic keys的相关问题

任何解决方案，都很好，请提前谢谢

Answer 1

您必须用来解析上述JSON Codable的[data模型应该是这样，

型号：

struct StateData: Codable {
    var districtData: [String:DistrictData]?
}

struct DistrictData: Codable {
    var confirmed: Int?
    var lastupdatedtime: String?
    var delta: DailyConfirmedData?
}

struct DailyConfirmedData: Codable {
    var confirmed: Int?
}

解析中：

let summary = try JSONDecoder().decode([String:StateData].self, from: data)

注意：如果JSON密钥与enum CodingKeys类型的属性完全匹配，则无需显式创建Codable。

Answer 2

根本的问题是IndianStateListModel具有称为states的属性。但是，您的JSON中没有此类密钥。我建议用singleValueContainer进行解析。例如。也许：