从嵌套的json数组中获取数据时出现问题

Question

我正在从 API 获取 JSON 数据，并且我已成功获得响应，但对我来说存在一些问题，即如何在没有密钥的情况下获得直接值，让我先向您展示我的响应

回复

{
  "message": "Notification Sent Successfully.",
  "success": "1",
  "message_list": [
    {
      "+919722552298": [
        {
          "body": "Sent from your Twilio trial account - This is test message by purvesh",
          "from": "",
          "sid": "",
          "status": "sent",
          "date_updated": "Mon, 01 Jul 2019 12:58:49 +0000",
          "date_sent": "Mon, 01 Jul 2019 12:58:49 +0000",
          "date_created": "Mon, 01 Jul 2019 12:58:49 +0000",
          "to": ""
        },
        {
          "body": "Sent from your Twilio trial account - This is test message by purvesh",
          "from": "",
          "sid": "",
          "status": "sent",
          "date_updated": "Sat, 29 Jun 2019 09:36:07 +0000",
          "date_sent": "Sat, 29 Jun 2019 09:36:07 +0000",
          "date_created": "Sat, 29 Jun 2019 09:36:07 +0000",
          "to": ""
        },
        {
          "body": "Sent from your Twilio trial account - This is test message by purvesh",
          "from": "",
          "sid": "",
          "status": "sent",
          "date_updated": "Sat, 29 Jun 2019 09:35:18 +0000",
          "date_sent": "Sat, 29 Jun 2019 09:35:18 +0000",
          "date_created": "Sat, 29 Jun 2019 09:35:18 +0000",
          "to": ""
        },
        {
          "body": "Sent from your Twilio trial account - This is a test message...",
          "from": "",
          "sid": "",
          "status": "sent",
          "date_updated": "Sat, 29 Jun 2019 05:56:43 +0000",
          "date_sent": "Sat, 29 Jun 2019 05:56:43 +0000",
          "date_created": "Sat, 29 Jun 2019 05:56:43 +0000",
          "to": ""
        },
        {
          "body": "Sent from your Twilio trial account - This is a test...",
          "from": "",
          "sid": "",
          "status": "sent",
          "date_sent": "Thu, 27 Jun 2019 11:52:44 +0000",
          "date_created": "Thu, 27 Jun 2019 11:52:43 +0000",
          "date_updated": "Thu, 27 Jun 2019 11:52:44 +0000",
          "to": ""
        }
      ]
    },
    {
      "+61459036405": [
        {
          "body": "Sent from your Twilio trial account - Thanks for the message. Configure your number's SMS URL to change this message.Reply HELP for help.Reply STOP to unsubscribe.Msg&Data rates may apply.",
          "from": "",
          "sid": "",
          "status": "delivered",
          "date_sent": "Sat, 29 Jun 2019 06:25:33 +0000",
          "date_created": "Sat, 29 Jun 2019 06:25:33 +0000",
          "date_updated": "Sat, 29 Jun 2019 06:25:35 +0000",
          "to": ""
        },
        {
          "body": "Hello Ron ",
          "from": "",
          "sid": "",
          "status": "received",
          "date_sent": "Sat, 29 Jun 2019 06:25:33 +0000",
          "date_created": "Sat, 29 Jun 2019 06:25:33 +0000",
          "date_updated": "Sat, 29 Jun 2019 06:25:33 +0000",
          "to": ""
        },
        {
          "body": "Sent from your Twilio trial account - This is a test message...",
          "from": "",
          "sid": "",
          "date_updated": "Sat, 29 Jun 2019 06:08:42 +0000",
          "date_created": "Sat, 29 Jun 2019 06:08:42 +0000",
          "status": "sent",
          "date_sent": "Sat, 29 Jun 2019 06:08:42 +0000",
          "to": ""
        }
      ]
    },
    {
      "+918733009842": [
        {
          "body": "Sent from your Twilio trial account - This is a test...",
          "from": "",
          "sid": "",
          "date_updated": "Thu, 27 Jun 2019 12:32:45 +0000",
          "date_created": "Thu, 27 Jun 2019 12:32:45 +0000",
          "status": "sent",
          "date_sent": "Thu, 27 Jun 2019 12:32:45 +0000",
          "to": ""
        },
        {
          "body": "Sent from your Twilio trial account - This is a test...",
          "from": "",
          "sid": "",
          "status": "sent",
          "date_created": "Thu, 27 Jun 2019 12:25:37 +0000",
          "date_updated": "Thu, 27 Jun 2019 12:25:37 +0000",
          "date_sent": "Thu, 27 Jun 2019 12:25:37 +0000",
          "to": ""
        },
        {
          "body": "Sent from your Twilio trial account - This is a test...",
          "from": "",
          "sid": "",
          "status": "sent",
          "date_created": "Thu, 27 Jun 2019 12:07:04 +0000",
          "date_updated": "Thu, 27 Jun 2019 12:07:04 +0000",
          "date_sent": "Thu, 27 Jun 2019 12:07:04 +0000",
          "to": ""
        },
        {
          "body": "Sent from your Twilio trial account - This is a test...",
          "from": "",
          "sid": "",
          "status": "sent",
          "date_created": "Thu, 27 Jun 2019 12:01:55 +0000",
          "date_updated": "Thu, 27 Jun 2019 12:01:55 +0000",
          "date_sent": "Thu, 27 Jun 2019 12:01:55 +0000",
          "to": ""
        }
      ]
    }
  ]
}

这是我的回复，现在我将向您展示我已成功获取 message_list 数组的数据，但问题是如何获取电话号码，这是您在我的回复中显示的主数组消息列表数组

func messageListAPI(){

    let preferences = UserDefaults.standard
    let uid = "u_id"
    let acTkn = "acc_tkn"
    let u_ID = preferences.object(forKey: uid)
    let A_Token = preferences.object(forKey: acTkn)

    let params = ["user_id": u_ID!,"access_token": A_Token!,"twilio_number": "+13344313181"]
    // print(params)
    Alamofire.request(messagelist, method: .post, parameters: params).responseJSON(completionHandler: {(response) in
        switch response.result{
        case.success(let value):
            let json  = JSON(value)
            print(json)
            let message = json["message"].stringValue
            let success = json["success"].stringValue
            let data = json["message_list"]
            let model = ResponseModel(message: message, success: success, messageList: data) // Here i am getting error
        case.failure(let error):
            print(error.localizedDescription)
        }

    })
}

这是我成功获得message_list 的API 调用方法，谁能帮我获取号码​​列表

Answer 1

您应该为响应创建这些模型：

/// Main response model
struct ResponseModel: Codable {
    let message: String
    let success: String
    let messageList: [[String: [MessageList]]]

    enum CodingKeys: String, CodingKey {
        case message, success
        case messageList = "message_list"
    }
}

/// MessageList Model
struct MessageList: Codable {
    let body: String
    let from: String
    let sid: String
    let status: Status
    let dateSent: String
    let dateCreated
    let dateUpdated
    let to: String

    enum CodingKeys: String, CodingKey {
        case body, from, sid, status
        case dateSent = "date_sent"
        case dateCreated = "date_created"
        case dateUpdated = "date_updated"
        case to
    }
}

/// For status field
enum Status: String, Codable {
    case delivered = "delivered"
    case received = "received"
    case sent = "sent"
}

---

您可以将这些模型与 Alamofire

一起使用

/// YOU MUST CHANGE 'ResponseType' with the real type of response

func messageListAPI(_ completion: @escaping (ResponseType) -> Void) {
    let urlString = "http://yourUrl"
    Alamofire.request(urlString).response { response in
        guard let data = response.data else { return }
        do {
            let decoder = JSONDecoder()
            let response: ResponseType = try decoder.decode(ResponseModel.self, from: data)
            let numberList = response.messageList.compactMap({ $0.keys })
            print("my numberList -> \(numberList)")
            completion(response)

        } catch let error {
            print(error)
            completion(nil)
        }
    }
}

用法：

messageListAPI { response in
    /// If response is nil it's means error appear.
    /// Otherwise it is successful
    print(response)
}

---

您也可以使用 URLSession

guard let yourUrl = URL(string: "https://myUrl") else { return }
URLSession.shared.dataTask(with: yourUrl) { (data, response , error) in      
    guard let data = data else { return }
    do {
    let decoder = JSONDecoder()
    let data = try decoder.decode(ResponseModel.self, from: data)
        print(data)
    } catch let error {
        print("Err", error)
    }
}.resume()

---

您可以使用这些模型来解析响应JSON。然后你可以得到这样的号码列表：

let numberList = ResponseModel.messageList.compactMap({ $0.keys })

如果您对使用 Codable 模型进行 API 响应有任何疑问，请立即提问。

享受吧。

Answer 2

只需粘贴您的 json 响应即可从 https://app.quicktype.io/ 获取您的模型

URLSession.shared.dataTask(with: yourURL) { (data, resonse, err) in
            if err == nil{

            }else{
                do{
                    let model = JSONDecoder().decode(YourModel.self, from: data!)
                }catch(let decodeErr){
                    print(decodeErr)
                }
            }
        }.resume()

Answer 3

由于消息列表是一个数组，你可以尝试这样做-

let data = json["message_list"]

for (index, item) in data.enumerated() {
    print(item[index])
}