swift - 如果字典为空，则出现可编码问题

Question

我正在尝试快速使用 Codable 协议(protocol)问题是我需要将从服务器获取的嵌套字典出队。认为数据:其值和内部数据多一个字典目标如果数据内的目标有一个值，它就可以正常工作但如果字典中的目标是空的，它会说错误 - 无法读取数据，因为其格式不正确。

我的 JSON 响应案例 1 - 没有目标 - 面临的问题

{
  "code": "1",
  "message": "Data fetched successfully",
  "data": {
    "id": "2",
    "organization_id": "2",
    "first_name": "iOS",
    "last_name": "test",
    "user_name": "iOS",
    "email": "ios@gmail.com",
    "password": "4399578cc31cf62535a7dba566e4aea0",
    "security_hash": "fdf4d3bb5731de23b42771e01d9e0c3e",
    "google_id": "525256562",
    "facebook_id": "525256562",
    "access_code": "iosTest1",
    "gender": "",
    "contact": "1234567890",
    "user_profile": "",
    "profile_thumb": "",
    "dob": "",
    "weight": "",
    "height": "",
    "is_corporate": "0",
    "status": "1",
    "created_at": "2018-04-19 10:37:46",
    "updated_at": "2018-12-10 15:32:59",
    "profile_image_url": "",
    "goal": {}
  }
}

情况 2:当目标具有值(value)时

{
  "code": "1",
  "message": "Data fetched successfully",
  "data": {
    "id": "2",
    "organization_id": "2",
    "first_name": "iOS",
    "last_name": "test",
    "user_name": "ios",
    "email": "ios@gmail.com",
    "password": "4399578cc31cf62535a7dba566e4aea0",
    "security_hash": "fdf4d3bb5731de23b42771e01d9e0c3e",
    "google_id": "525256562",
    "facebook_id": "525256562",
    "access_code": "iosTest1",
    "gender": "",
    "contact": "1234567890",
    "user_profile": "",
    "profile_thumb": "",
    "dob": "",
    "weight": "",
    "height": "",
    "is_corporate": "0",
    "status": "1",
    "created_at": "2018-04-19 10:37:46",
    "updated_at": "2018-12-10 15:32:59",
    "profile_image_url": "",
    "goal": {
      "id": "4",
      "client_id": "2",
      "ambition_to_achieve": "adfadf",
      "current_assessment": "dfadfafa",
      "expected": "fasdfasdfsafsf",
      "expected_date": "2018-12-15",
      "description": "asdfadsfadf",
      "goal_status": "1",
      "created_at": "2018-12-12 18:15:36",
      "updated_at": ""
    }
  }
}

///--- 处理主要数据的主类

struct LoggedUser: Codable {
    var dob, weight, height: String?
    let accesscode, contact, contactcode, email, facebookid: String?
    let firstname, gender, googleid, id, iscorporate, lastname: String?
    let organizationid, password, profilethumb, securityhash, status: String?
    let username, userprofile : String?
    let goal:Goal?

    enum CodingKeys: String, CodingKey {
        case accesscode="access_code"
        case contact, dob, email, gender, height, id, password, status, weight, goal
        case contactcode="contact_code"
        case facebookid="facebook_id"
        case firstname="first_name"
        case googleid="google_id"
        case iscorporate="is_corporate"
        case lastname="last_name"
        case organizationid="organization_id"
        case profilethumb="profile_thumb"
        case securityhash="security_hash"
        case username="user_name"
        case userprofile="user_profile"
    }
}

///---> 目标类

struct Goal: Codable {
    let id, clientID, ambitionToAchieve, currentAssessment: String?
    let expected, expectedDate, description, goalStatus: String?
    let createdAt, updatedAt: String?

    enum CodingKeys: String, CodingKey {
        case id
        case clientID = "client_id"
        case ambitionToAchieve = "ambition_to_achieve"
        case currentAssessment = "current_assessment"
        case expected
        case expectedDate = "expected_date"
        case description
        case goalStatus = "goal_status"
        case createdAt = "created_at"
        case updatedAt = "updated_at"
    }
}

----> 更新只是更正发布实际回复

Get My Goal API Response ==> ["code": 1, "message": Data fetched successfully, "data": {
    "access_code" = iosTest4;
    contact = 1111111111;
    "contact_code" = 91;
    "created_at" = "2019-02-12 14:42:34";
    dob = "1996-05-10";
    email = "testing@email.com";
    "facebook_id" = "";
    "first_name" = iOS;
    gender = 1;
    goal =     (
    );
    "google_id" = "";
    height = "5.10";
    id = 35;
    "is_corporate" = 0;
    "last_name" = test;
    "organization_id" = 0;
    password = 915729f1e48bda300dabaac7d1ac8358;
    "profile_image_url" = "";
    "profile_thumb" = "";
    "security_hash" = 991f5cd86be6fc485633d1946dc84a7a;
    status = 1;
    "updated_at" = "2019-02-14 16:25:01";
    "user_name" = "testing@email.com";
    "user_profile" = "";
    weight = "0.10";
}]

Answer 1

当我得到两种不同的格式时当目标为空时，它会给我一个数组当有一些值时，它返回一个字典所以我通过手动将目标转换为 [String:Any] 显式创建了我自己的 Data()

var loginDataDict = jsonDict["data"] as! [String:Any]
if let goalData = loginDataDict["goal"] as? [String:Any] {
   loginDataDict.updateValue(goalData, forKey: "goal")
} else {
   loginDataDict.updateValue([:], forKey: "goal")
} 

这可能不是一个合适的解决方案，但如果遇到与我这里相同的情况，可能会对某人有所帮助