ios - 来自 Tracker Network API (SWIFT) 的 JSON

Question

我在从我的 API 读取数据时遇到问题。我可以在 Xcode 中看到我的 API 中的所有数据。

这是我要解析的数据。

  "data": {
    "id": "2f464c52-81a5-4b2d-9d08-21baf10134bd",
    "type": "player",
    "metadata": {
      "statsCategoryOrder": [
        "levels",
        "combat",
        "game",
        "bullets",
        "ekia-enemy-killed-in-action",
        "objective",
        "team-play",
        "extra"
      ],
      "platformId": 1,
      "platformUserHandle": "BarMexico67",
      "accountId": "2f464c52-81a5-4b2d-9d08-21baf10134bd",
      "cacheExpireDate": "10/31/2018 1:45:55 AM"
    },
    "stats": [
      {
        "metadata": {
          "key": "level",
          "name": "Level",
          "categoryKey": "levels",
          "categoryName": "Levels",
          "isReversed": false,
          "iconUrl": "https://cod-cdn.tracker.gg/assets/ranks/rank_6.png"
        },
        "value": 6.0,
        "percentile": 92.0,
        "displayValue": "6"
      },
      {
        "metadata": {
          "key": "KDRatio",
          "name": "KD Ratio",
          "categoryKey": "combat",
          "categoryName": "Combat",
          "isReversed": false
        },
        "value": 0.39,
        "percentile": 96.0,
        "displayValue": "0.39",
        "displayRank": ""
      },

我正在尝试获取 Level 和 KD Ratio 的值并将其放置在标签上。

但是，我收到错误“keyNotFound(CodingKeys(stringValue: "stats", intValue: nil)

这是我当前的代码。任何帮助都会很棒。

struct Data: Decodable {
    let id: String?
    let type: String?
    let stats: [Stats]
}

struct Stats: Decodable {
    let name: String?
    let categoryName: String?
    let displayValue: Int?
    let value: Int?
}

class StatTrackerVC: UIViewController {

    @IBOutlet weak var accountNameLabel: UILabel!

    let blackOps4TrackerNetworkAPI = "4db06ff7-4499-494d-8d75-93a9b38292a3"
    let urlString = URL(string: "https://cod-api.tracker.gg/v1/standard/bo4/profile/1/BarMexico67")


    override func viewDidLoad() {
        super.viewDidLoad()

        let jsonUrlString = "https://cod-api.tracker.gg/v1/standard/bo4/profile/1/BarMexico67"
        guard let url = URL(string: jsonUrlString) else
            { return }

        var request = URLRequest(url: url)
        request.httpMethod = "GET"
        request.addValue(blackOps4TrackerNetworkAPI, forHTTPHeaderField: "TRN-Api-Key")


        URLSession.shared.dataTask(with: request) { (data, response, err) in
            //Perhaps Check Err
            //Check Response Status 200 OK

            guard let data = data else { return }

//            let dataAsString = String(data: data, encoding: .utf8)
//            print(dataAsString!)

            do {
                let stats = try JSONDecoder().decode(Data.self, from: data)
                print(stats)

            } catch let jsonErr {
                print("Error Serializing JSON:", jsonErr)
            }
        }.resume()

    }

Answer 1

实际上 stats 对象不在 data 对象中，而是它们处于同一级别。所以，stats 数组不应该在 Data 类型中。同样在 stat 对象中，metaData 是一个子对象，它具有 key、categoryKey、categoryName 等键，而 value、percentile 和 displayValue 是 stat 对象的一部分。可解码类型的正确实现如下，

struct TrackerResponse: Decodable {
     let data: StatData?
     let stats: [Stat]?
}

struct StatData: Decodable {
    let id: String?
    let type: String?
    let accountId: String?
    let platformId: Int?
}


struct Stat: Decodable {
    let value: Int?
    let metadata: StatMeta?
    let percentile: Int?
    let displayValue: String?
}

struct StatMeta: Decodable {
    let key: String?
    let name: String?
    let categoryKey: String?
    let categoryName: String?
}

所以，现在你应该解码 TrackerResponse，如下所示，

do {
    print(String(data: data, encoding: .utf8))
    let response = try JSONDecoder().decode(TrackerResponse.self, from: data)
    print(response.data?.id)

} catch let jsonErr {
    print("Error Serializing JSON:", jsonErr)
}