Unity Json解析IPA

今天看到一个unity 自带的解析json的IPA，感觉比litjson好用很多，废话不多，上代码

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using System;
using System.IO;

[Serializable]
public class MyClass
{
    public int level;
    public float timeElapsed;
    public string playerName;
}
public class Srealizable : MonoBehaviour {
    string json;
    string path;
    private void Awake()
    {
            path = Application.streamingAssetsPath + "/myclas.txt";
    }
    // Use this for initialization
    void Start () { Test1();}
    public void Test1()
    {
        MyClass myObject = new MyClass();
        myObject.level = ;
        myObject.timeElapsed = 47.5f;
        myObject.playerName = "Dr Charles Francis";
        json = JsonUtility.ToJson(myObject);
        Debug.LogError(json);
        //  DesTets();
        WritOBJ();
    }

    public void DesTets()
    {
      MyClass  Obj = JsonUtility.FromJson<MyClass>(json);
        Debug.LogError(Obj.level);
    }

    void WritOBJ()
    {
        StreamWriter streamWriter = new StreamWriter(path,true);
      //  byte[] data = System.Text.Encoding.Unicode.GetBytes(json);
        streamWriter.Write(json);
        streamWriter.Close();
        ReadOBJ();
    }
    void ReadOBJ()
    {
        StreamReader streamReader = new StreamReader(path);
       string str=  streamReader.ReadToEnd();
        streamReader.Close();
        MyClass obj = JsonUtility.FromJson<MyClass>(str);
        Debug.LogError(obj.level + "  " + obj.playerName + "   " + obj.timeElapsed);
    }
}