Unity 各文件夹路径在不同平台的读写

 // 定义构造函数    public PathUtil()    {        dataPath =#if  !UNITY_EDITOR && (UNITY_ANDROID||UNITY_IPHONE)        Application.dataPath;#elif UNITY_EDITOR "file://" + Application.dataPath;#else      string.Empty;#endif        streamingAssetsPath =#if  !UNITY_EDITOR && (UNITY_ANDROID||UNITY_IPHONE)        Application.streamingAssetsPath;#elif UNITY_EDITOR "file://" + Application.streamingAssetsPath;#else      string.Empty;#endif        persistentDataPath =#if  !UNITY_EDITOR && (UNITY_ANDROID||UNITY_IPHONE) "file:///" + Application.persistentDataPath;#elif UNITY_EDITOR "file:///" + Application.persistentDataPath;#else      string.Empty;#endif    }