Unity将数据保存为本地Json文件

/// 判断文件是否存在
public static bool CheckFileExists(string filePath)
    {
        return File.Exists(filePath);
    }
    /// <summary>
    /// 保存json为文件
    /// </summary>
    /// <param name="jsonData"></param>
    /// <param name="filePath"></param>
    public static void SaveJsonToFile(string jsonString, string filePath)
    {
        JsonData jsonData = JsonMapper.ToObject(jsonString);

        bool fileExists = CheckFileExists(filePath);
        if (fileExists)
        {
            Debug.LogError("文件存在。");
        }
        else
        {
            using (StreamWriter sw = new StreamWriter(filePath))
            {
                sw.Write(jsonData.ToJson());
            }
            Debug.LogError("文件不存在。保存成功");
        }
       
    }
///请求接口 

    IEnumerator UnityWebRequestPost(string url, Dictionary<string, string> formdata, Action<string> textCallBack)
    {
        WWWForm wWForm = new WWWForm();
        foreach (var item in formdata)
        {
            wWForm.AddField(item.Key, item.Value);
        }
        using (UnityWebRequest request = UnityWebRequest.Post(url, wWForm))
        {
            // request.downloadHandler = (DownloadHandler)new DownloadHandlerBuffer();


            yield return request.SendWebRequest();
            if (request.isHttpError || request.isNetworkError)
            {
                Debug.LogError(request.error);

            }
            else
            {
                string result = request.downloadHandler.text;
                string filePath = Application.dataPath + "/example.json";
                SaveJsonToFile(result, filePath);
                textCallBack?.Invoke(result);
            }
        }
    }
// 请求数据
  public void StartGetweather()
    {
        Dictionary<string, string> formDic = new Dictionary<string, string>();
        formDic.Add("deviceId", "408aee9882453566018247d34b090002");
        StartCoroutine(UnityWebRequestPost(url, formDic, text =>
          {
              Debug.Log("请求结果：" + text);
              Root root = JsonMapper.ToObject<Root>(text);
              JsonData jsonData = JsonMapper.ToObject(text);
              for (int i = 0; i < root.GetDatas.Count; i++)
              {
                  Debug.Log(root.GetDatas[i].GetDevStatus);
              }
             
        }));


    }