void JudgementOrCreate()
        {
            if (File.Exists(Application.persistentDataPath + "/RankingList.txt"))
                Debug.Log("已有文件");
            else
                File.Open(Application.persistentDataPath + "/RankingList.txt", FileMode.Create);
            //Debug.Log(Application.persistentDataPath);
        }

首先在本地建一个文件来存我们的数据

void ReaderJson()
        {
            StreamReader sr = new StreamReader(Application.persistentDataPath + "/RankingList.txt");
            string nextLine;
            while ((nextLine = sr.ReadLine()) != null)
                _scoreDataList.Add(JsonUtility.FromJson<SortScoreData>(nextLine));
            sr.Close();//将所有存储的分数全部存到list中   分行存入
    }

然后我们在文件中读取数据

void ScoreSort()
        {
            _scoreDataList.Sort();
            StreamWriter sw = new StreamWriter(Application.persistentDataPath + "/RankingList.txt");//写入数据流
            foreach (SortScoreData t in _scoreDataList)
            {
					 sw.WriteLine(JsonUtility.ToJson(t));//重新写入排序后的json数据
			}
            sw.Close();//写入结束
        }

我们将数据写入