程序篇01：Unity数据持久化 - kudan-game/ArtArtist-Repo GitHub Wiki

本篇介绍如何将Unity数据持久化

方式一：PlayerPrefs——Unity自带的持久化方法

PlayerPrefs：它的工作原理是以键值对的形式将数据保存在文件中。

//保存A_name, m_inputField.text键值对

PlayerPrefs.SetString("A_name", m_inputField.text);

//读取A_name键的值，default name对应空值

m_inputField.text = PlayerPrefs.GetString("A_name","default name");

PlayerPrefs是一个持久化数据的字典存储格式，发现这个方法是可以保存到硬盘文件的（windows是注册表中。。），而且使用是可以跨Scene的。

方式二：Application.persistentDataPath——Unity提供的应用持久化数据路径

persistentDataPath：此属性用于返回一个持久化数据存储目录的路径，可以在此路径下存储一些持久化的数据文件。

例如先声明目录文件全路径：

private string pathFile = Application.persistentDataPath + "/redapple.txt";

实例输出的路径为：

C:/Users/heave/AppData/LocalLow/DefaultCompany/New Unity Project/redapple.txt

完整读写代码实例如下：

        private string pathFile = Application.persistentDataPath + "/redapple.txt";
        private string strIP = null;
        private string strPort = null;
        public string[] pData;//存放两个持久化数据
       //读取数据
        public bool ReadData()
        {
            bool ret = false;
            if (ReadFromFile(pathFile, 2, ref pData))
            {
                strIP = pData[0];
                strPort = pData[1];
                ret = true;
            }
            return ret;
        }
        //读取文件
        public bool ReadFromFile(string path, int length, ref string[] data)
        {
            StreamReader sr = new StreamReader(path);
            for (int i = 0; i < length; i++)
            {
                data[i] = sr.ReadLine();
            }
            sr.Close();
            return true;
        }
        //写入数据
        public bool WriteData(string strip, string strport)
        {
            bool ret = false;
            pData[0] = strip;
            pData[1] = strport;
            if (WriteToFile(pathFile, 2, pData))
            {
                ret = true;
            }
            return ret;
        }
        //写入文件
        public bool WriteToFile(string path, int length, string[] data)
        {
            StreamWriter sw = new StreamWriter(path);
            sw.Write("");
            for (int i = 0; i < length; i++)
            {
                sw.WriteLine(data[i]);
            }
            sw.Close();
            return true;
        }

附：Unity3d中相应各平台Path

IOS:
Application.dataPath :                      Application/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/xxx.app/Data
Application.streamingAssetsPath :   Application/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/xxx.app/Data/Raw
Application.persistentDataPath :      Application/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/Documents
Application.temporaryCachePath :   Application/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx/Library/Caches

Android:
Application.dataPath :                         /data/app/xxx.xxx.xxx.apk
Application.streamingAssetsPath :      jar:file:///data/app/xxx.xxx.xxx.apk/!/assets
Application.persistentDataPath :         /data/data/xxx.xxx.xxx/files
Application.temporaryCachePath :      /data/data/xxx.xxx.xxx/cache

Windows:
Application.dataPath :                         /Assets
Application.streamingAssetsPath :      /Assets/StreamingAssets
Application.persistentDataPath :         C:/Users/xxxx/AppData/LocalLow/CompanyName/ProductName
Application.temporaryCachePath :      C:/Users/xxxx/AppData/Local/Temp/CompanyName/ProductName

Mac:
Application.dataPath :                         /Assets
Application.streamingAssetsPath :      /Assets/StreamingAssets
Application.persistentDataPath :         /Users/xxxx/Library/Caches/CompanyName/Product Name
Application.temporaryCachePath :      /var/folders/57/6b4_9w8113x2fsmzx_yhrhvh0000gn/T/CompanyName/Product Name


Windows Web Player:
Application.dataPath :             file:///D:/MyGame/WebPlayer (即导包后保存的目录，html文件所在目录)
Application.streamingAssetsPath :
Application.persistentDataPath :
Application.temporaryCachePath :