Unity3D 本地数据持久化几种方式

下面介绍几种 Unity本地记录存储的实现方式。

第一种 Unity自身提供的 PlayerPrefs

//保存数据

PlayerPrefs.SetString("Name",mName);





PlayerPrefs.SetInt("Age",mAge);





PlayerPrefs.SetFloat("Grade",mGrade)

//读取数据

mName=PlayerPrefs.GetString("Name","DefaultValue");





mAge=PlayerPrefs.GetInt("Age",0);





mGrade=PlayerPrefs.GetFloat("Grade",0F);

//清除所有记录

 PlayerPrefs.DeleteAll();

//删除其中某一条记录

PlayerPrefs.DeleteKey("Age");

//将记录写入磁盘

PlayerPrefs.Save()

第二种 BinaryFormatter 二进制序列化

假设有一个Player类

[System. Serializable]





public class Player





{





      public int health;





      public int  power;





      public Vector3 position;





}

由于BinaryFormatter序列化不支持Unity的Vector3类型，所以我们需要做一下包装。

public class PlayerData{





    





    public int level;





    public int health;





    public float[] position;





 





    public PlayerData(Player player)





    {





        this.level = player.level;





        this.health = player.health;





        this.position = new float[3];





        this.position[0] = player.transform.position.x;





        this.position[1] = player.transform.position.y;





        this.position[2] = player.transform.position.z;





    }





}

我们对PlayerData进行保存和读取。读取出来的PlayerData可以赋给Player。

public static class SaveSystem{





       //保存数据





    public static void SavePlayer(Player player)





    {





        BinaryFormatter formatter = new BinaryFormatter();





        string path = Application.persistentDataPath+"/player.fun";





        FileStream stream = new FileStream(path,FileMode.Create);





        PlayerData data = new PlayerData(player);





        formatter.Serialize(stream,data);





        stream.Close();





    }





 





     //读取数据





    public static PlayerData LoadPlayer()





    {





        string path = Application.persistentDataPath+"/player.fun";





        if(File.Exists(path))





        {





            BinaryFormatter formatter = new BinaryFormatter();





            FileStream stream = new FileStream(path,FileMode.Open);





            PlayerData data = formatter.Deserialize(stream) as PlayerData;





            stream.Close();





            return data;





        }else{





            Debug.LogError("Save file not found in  "+path);





            return null;





        }





    }





}

第三种 保存为json格式的文本文件

使用 Unity 自身API JsonUtility。

保存数据

    public static void SavePlayerJson(Player player)





    {





        string path = Application.persistentDataPath+"/player.json";





        var content = JsonUtility.ToJson(player,true);





        File.WriteAllText(path,content);





    }

读取数据

    public static PlayerData LoadPlayerJson()





    {





        string path = Application.persistentDataPath+"/player.json";





        if(File.Exists(path)){





            var content = File.ReadAllText(path);





            var playerData = JsonUtility.FromJson<PlayerData>(content);





            return playerData;





        }else{





            Debug.LogError("Save file not found in  "+path);





            return null;





        }





    }

第四种 XmlSerializer进行串行化

假如有类

public class Entity





{





    public Entity()





    {





    }





    public Entity(string c, string f)





    {





      name = c;





      school = f;





    }





    public string name;





    public string school;





}

读取数据

List<Entity> entityList=null;





XmlSerializer xs = new XmlSerializer(typeof(List<Entity>));





using (StreamReader sr = new StreamReader(configPath))





{





   entityList = xs.Deserialize(sr) as List<Entity>;





}

保存数据

List<Entity> entityList=null;





XmlSerializer xs = new XmlSerializer(typeof(List<Entity>));





using (StreamWriter sw = File.CreateText(configPath))





{





  xs.Serialize(sw, entityList);





}

对应的xml文件为：

<?xml version="1.0" encoding="utf-8"?>





<ArrayOfEntity xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">





 <Entity>





  <Name>Alice</Name>





  <School>SJTU</School>





 </Entity>





 <Entity>





  <Name>Cici</Name>





  <School>CSU</School>





 </Entity>





 <Entity>





  <Name>Zero</Name>





  <School>HIT</School>





 </Entity>





</ArrayOfEntity>