我如何解析自定义 JSON 数据答案

【问题标题】：How do i parse custom JSON Data我如何解析自定义 JSON 数据
【发布时间】：2021-01-29 18:52:44
【问题描述】：

在这里，我根据下面给出的指南提供了代码工作示例，并且似乎得到了空值。

这是我完整的 JSON 数据，

some: {
  "success": true,
  "data": 
[
  {
    "15-10-2020": [
      {
        "id": 100,
        "details": {
          "_id": 1,
          "_title": "My Title"
        },
        "created_at": "2020-10-15"
      },
      {
        "snf_id": 101,
        "details": {
          "_id": 1,
          "_title": "My Title"
        },
        "created_at": "2020-10-15"
      },
      {
         "snf_id": 102,
        "details": {
          "_id": 1,
          "_title": "My Title"
        },
        "created_at": "2020-10-15"
      }
    ],
    "30-09-2020": [
           {
         "snf_id": 301,
        "details": {
          "_id": 8,
          "_title": "My Title"
        },
        "created_at": "2020-09-30"
      }
  ]
  }
],
  "message": "Successfully Retrieved"
}


struct Response : Codable {
    var success : Bool?
    var data : [Data]?
    var message : String?
}

struct Data: Codable {
    var snf_id: Int?
    var details: Details?
    var created_at: String?
}

// MARK: - Details
struct Details: Codable {
    var _id: Int?
    var _title: String?
}

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

为数据返回空值，

▿ 回应 ▿ 成功：可选 - 一些：真的 ▿ 数据：可选 ▿ 一些：1 个元素 ▿ 0 : 数据 - snf_id：无 - 细节：无 - created_at：无 ▿ 留言：可选 - 一些：“成功检索”

【问题讨论】：

标签： ios arrays json swift

【解决方案1】：

some: {
  "success": true,
  "data": 
[
  {
    "15-10-2020": [
      {
        "id": 100,
        "details": {
          "_id": 1,
          "_title": "My Title"
        },
        "created_at": "2020-10-15"
      },
      {
        "snf_id": 101,
        "details": {
          "_id": 1,
          "_title": "My Title"
        },
        "created_at": "2020-10-15"
      },
      {
         "snf_id": 102,
        "details": {
          "_id": 1,
          "_title": "My Title"
        },
        "created_at": "2020-10-15"
      }
    ],
    "30-09-2020": [
           {
         "snf_id": 301,
        "details": {
          "_id": 8,
          "_title": "My Title"
        },
        "created_at": "2020-09-30"
      }
  ]
  }
],
  "message": "Successfully Retrieved"
}

struct Response : Codable {
    var success : Bool?
    **var data : [[String:[Data]]]?**
    var message : String?
}

struct Data: Codable {
    var snf_id: Int?
    var details: Details?
    var created_at: String?
}

// MARK: - Details
struct Details: Codable {
    var _id: Int?
    var _title: String?
}


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

【讨论】：

【解决方案2】：

您的 json 中没有 myData 键，您的 json 顶部结构是一个包含元素的数组，其中每个元素值都是一个数组，例如 [[String: [Root]]]

struct Root: Codable {
    let id: Int?
    let details: Details
    let createdAt: String
    let snfID: Int?

    enum CodingKeys: String, CodingKey {
        case id, details
        case createdAt = "created_at"
        case snfID = "snf_id"
    }
}

// MARK: - Details
struct Details: Codable {
    let id: Int
    let title: String

    enum CodingKeys: String, CodingKey {
        case id = "_id"
        case title = "_title"
    }
}

解码

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

【讨论】：