【Unity&JSON】JsonUtility的多对象读写(4)

来源：互联网发布：上海市行知中学校徽编辑：程序博客网时间：2024/06/12 08:17

原文内容来自：Read from and write to external .json files using JsonUtilities or LitJson

文件Unity 版本号5.3，使用时候Unity 版本号5.6

文件分流unity-json-master

本文仅作分析，学习用途。

类似下面这样，//* 这样的表示和 LitJson 对应的代码相同。

//* 的分数 +1

通过注释来区别。主要用于表示在代码中可以改变的数据。

someList.Add (createSubObject ("Amazing Angus6", 64546));

原代码，无注释。

someList.Add (createSubObject ("Amazing Angus", 6454));

_4Update_ObjectArray_JsonUtility
----------------------------------------------------------------------------------------------原代码+注释

// Reading an array with nested object stored in a JSON-formatted text file. Changing objects and adding more objects
// using JsonUtility
// At start: {"highscore":[{"name":"BadBoy","scores":4711}]}
// After step 5: {"highscore":[{"name":"BadBoy","scores":4711},{"name":"MagicMike","scores":8828}]}
// After step 7: {"highscore":[{"name":"BadBoy","scores":4712},{"name":"MadMax","scores":1234},{"name":"Amazing Angus","scores":6454},{"name":"Good Guys","scores":1936}]}

using UnityEngine;
using System;
using System.IO;
using System.Collections.Generic;
using System.Runtime.Serialization.Formatters.Binary;

public class _4Update_ObjectArray_JsonUtility : MonoBehaviour {
   void Start () {

        /**
       * 1. Fetch text from file * 从文件中取出 text 文本
       */

        string jsonString = File.ReadAllText (Application.dataPath + "/Resources/Json_UpdateObjectArray.json");
       Debug.Log ("JSON-String before: " + jsonString);
        // logs {"highscore":[{"name":"BadBoy","scores":4711}]}

        /**
       * 2. Transform JSON formatted text into object
         * * 转换 JSON 格式文本成为 JSONDATA 对象 myObject。文本-》对象
       */

        MainObjectData_upd_JsonUtility mainObject = JsonUtility.FromJson<MainObjectData_upd_JsonUtility> (jsonString);
       Debug.Log("Size of array before: " + mainObject.highscore.Length); // 1

       List<string> name_list = new List<string> ();//* 专门存放名字的字符串List
        List<int> scores_list = new List<int> ();//* 专门存放分数的整型List
        //* 遍历每一个 "highscore"
        for (int i=0; i < mainObject.highscore.Length; i++) {
           name_list.Add(mainObject.highscore[i].name.ToString());//* 找到myObject中的"highscore"中的"name" 数据转换为字符串并保存
            scores_list.Add(int.Parse(mainObject.highscore[i].scores.ToString()));//* 找到myObject中的"highscore"中的"scores" 数据转换为字符串并保存
        }

        /**
       * 3. Enlarge the JSON Object * 放大 JSON 对象
       */

        name_list.Add ("MadMax6");//* 在名字列表中添加一个名字
        scores_list.Add (12346);//* 在分数列表中添加一个分数

        /**
       * 4. Change entries in JSON object
       * BadBoy bekommt einen Extrapunkt
       */

        int position=-1;
       for (int i = 0; i < name_list.Count; i++)
        {//* 遍历每个名字列表的名字
            if (name_list [i] == "BadBoy")
            {//* 找到名字为 "BadBoy" 的数字索引
                position = i;//* 获得 "BadBoy" 的位置数字索引
                break;
           }
       }
       if (position > -1)//* "BadBoy" 的位置数字索引
            scores_list [position] += 1;//* 的分数 +1

        /**
       * 5. Create some nested objects in an array again and store them back into a JSON string
         * * 创建一些嵌套对象到数组中，并且使得这些数据存储为JSON 字符串
       */
        //* 定义并赋值一个空的   内部对象数据LitJson，用于存储玩家的名字和得分
        List<InnerObjectData_upd_JsonUtility> innerObjects_list = new List<InnerObjectData_upd_JsonUtility> ();
       for (int i = 0; i < name_list.Count; i++) {
           InnerObjectData_upd_JsonUtility myInnerObject = new InnerObjectData_upd_JsonUtility();//* 在内部对象表中添加内部对象数据（名字表，得分表）
            myInnerObject.name = name_list[i];
           myInnerObject.scores = scores_list[i];
           innerObjects_list.Add (myInnerObject);//内部对象表中添加 myInnerObject
       }

       mainObject.highscore = innerObjects_list.ToArray();

       jsonString = JsonUtility.ToJson(mainObject);//* 把 mainObject 从对象转换为JSON格式
        Debug.Log ("JSON-String thereafter: " + jsonString);
       // logs {"highscore":[{"name":"BadBoy","scores":4711},{"name":"MagicMike","scores":8828}]}
       Debug.Log("Size of array thereafter: " + mainObject.highscore.Length); // 2

       /**
       * 6. Save JSON-formatted string in text file
       */

       //File.WriteAllText(Application.dataPath+"/Resources/Json_UpdateObjectArray.json", jsonString.ToString());

       /**
       * 7. Quickly adding more objects without touching existing contents, thus faster (not possible with LitJson)
       */
        // 把 jsonString 从 JSON格式转换为对象
       mainObject = JsonUtility.FromJson<MainObjectData_upd_JsonUtility> (jsonString);
       List<InnerObjectData_upd_JsonUtility> someList = new List<InnerObjectData_upd_JsonUtility>(mainObject.highscore);//新建一个排名榜
        //在排名榜中添加（新建名字，分数）
       someList.Add (createSubObject ("Amazing Angus6", 64546));
       someList.Add (createSubObject ("Good Guys6", 19366));

       mainObject.highscore = someList.ToArray();//

       jsonString = JsonUtility.ToJson(mainObject);//把对象转换为JSON格式
       Debug.Log ("Quickly added one more object without analyzing contents: " + jsonString);
       // logs {"highscore":[{"name":"BadBoy","scores":4712},{"name":"MadMax","scores":1234},{"name":"Amazing Angus","scores":6454},{"name":"Good Guys","scores":1936}]}
       Debug.Log("Size of array thereafter: " + mainObject.highscore.Length); // 4

       /**
       * 8. Save JSON-formatted string in text file
       */

       //File.WriteAllText(Application.dataPath+"/Resources/Json_UpdateObjectArray.json", jsonString.ToString());
   }
    //一个 InnerObjectData_upd_JsonUtility 类型的 createSubObject 公共函数
    public InnerObjectData_upd_JsonUtility createSubObject(string name, int scores){
       InnerObjectData_upd_JsonUtility myInnerObject = new InnerObjectData_upd_JsonUtility();
       myInnerObject.name = name;
       myInnerObject.scores = scores;
       return myInnerObject;
   }
}

[Serializable]//UNITY 自带的序列化
public class MainObjectData_upd_JsonUtility
{//主对象数据List Json，用于存储最高得分
    public InnerObjectData_upd_JsonUtility [] highscore;
}

[Serializable]//UNITY 自带的序列化
public class InnerObjectData_upd_JsonUtility
{//内部对象数据LitJson，用于存储玩家的名字和得分
    public string name;
   public int scores;
}

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