ios - 从嵌套 json 数组获取数据时出现问题

Question

我正在从 API 获取 JSON 数据，并且成功获得响应，但对我来说有一些问题，如何在没有 key 的情况下获取直接值，首先让我向您展示我的响应

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，但问题是如何获取作为主数组的电话号码，如您在我的回复中所示我想要号码列表这是侧边消息列表数组中的数组

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)
        }

    })
}

这是我的 API 调用方法，我成功获取 message_list 任何人都可以帮助我获取号码​​列表

Answer 1

您应该创建这些模型以进行响应:

/// 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"
}

<小时/>

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)
}

<小时/>

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()

<小时/>

您可以使用这些模型来解析响应 JSON。然后你就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，请立即询问。

享受吧。