c# - 保存游戏状态的最佳方法是什么？

Question

我找到了在 Unity3D 游戏引擎中保存游戏数据的最佳方式。
首先，我使用 BinaryFormatter 序列化对象。

但是听说这种方式存在一些问题，不适合保存。
那么，保存游戏状态的最佳或推荐方法是什么？

在我的例子中，保存格式必须是字节数组。

Answer 1

But I heard this way has some issues and not suitable for save.

没错。在某些设备上，BinaryFormatter 存在问题。当您更新或更改类(class)时，情况会变得更糟。由于类不再匹配，您的旧设置可能会丢失。有时，您会因此在读取保存的数据时遇到异常。

此外，在 iOS 上，您必须添加 Environment.SetEnvironmentVariable("MONO_REFLECTION_SERIALIZER", "yes"); 否则您将遇到 BinaryFormatter 问题。

最好的保存方式是使用 PlayerPrefs 和 Json。您可以学习如何做到这一点 here .

In my case, save format must be byte array

在这种情况下，您可以将其转换为 json，然后将 json string 转换为 byte 数组。然后，您可以使用 File.WriteAllBytes 和 File.ReadAllBytes 来保存和读取字节数组。

这是一个可用于保存数据的通用类。几乎与 this 相同但它不使用PlayerPrefs。它使用文件来保存json数据。

DataSaver 类:

public class DataSaver
{
    //Save Data
    public static void saveData<T>(T dataToSave, string dataFileName)
    {
        string tempPath = Path.Combine(Application.persistentDataPath, "data");
        tempPath = Path.Combine(tempPath, dataFileName + ".txt");

        //Convert To Json then to bytes
        string jsonData = JsonUtility.ToJson(dataToSave, true);
        byte[] jsonByte = Encoding.ASCII.GetBytes(jsonData);

        //Create Directory if it does not exist
        if (!Directory.Exists(Path.GetDirectoryName(tempPath)))
        {
            Directory.CreateDirectory(Path.GetDirectoryName(tempPath));
        }
        //Debug.Log(path);

        try
        {
            File.WriteAllBytes(tempPath, jsonByte);
            Debug.Log("Saved Data to: " + tempPath.Replace("/", "\\"));
        }
        catch (Exception e)
        {
            Debug.LogWarning("Failed To PlayerInfo Data to: " + tempPath.Replace("/", "\\"));
            Debug.LogWarning("Error: " + e.Message);
        }
    }

    //Load Data
    public static T loadData<T>(string dataFileName)
    {
        string tempPath = Path.Combine(Application.persistentDataPath, "data");
        tempPath = Path.Combine(tempPath, dataFileName + ".txt");

        //Exit if Directory or File does not exist
        if (!Directory.Exists(Path.GetDirectoryName(tempPath)))
        {
            Debug.LogWarning("Directory does not exist");
            return default(T);
        }

        if (!File.Exists(tempPath))
        {
            Debug.Log("File does not exist");
            return default(T);
        }

        //Load saved Json
        byte[] jsonByte = null;
        try
        {
            jsonByte = File.ReadAllBytes(tempPath);
            Debug.Log("Loaded Data from: " + tempPath.Replace("/", "\\"));
        }
        catch (Exception e)
        {
            Debug.LogWarning("Failed To Load Data from: " + tempPath.Replace("/", "\\"));
            Debug.LogWarning("Error: " + e.Message);
        }

        //Convert to json string
        string jsonData = Encoding.ASCII.GetString(jsonByte);

        //Convert to Object
        object resultValue = JsonUtility.FromJson<T>(jsonData);
        return (T)Convert.ChangeType(resultValue, typeof(T));
    }

    public static bool deleteData(string dataFileName)
    {
        bool success = false;

        //Load Data
        string tempPath = Path.Combine(Application.persistentDataPath, "data");
        tempPath = Path.Combine(tempPath, dataFileName + ".txt");

        //Exit if Directory or File does not exist
        if (!Directory.Exists(Path.GetDirectoryName(tempPath)))
        {
            Debug.LogWarning("Directory does not exist");
            return false;
        }

        if (!File.Exists(tempPath))
        {
            Debug.Log("File does not exist");
            return false;
        }

        try
        {
            File.Delete(tempPath);
            Debug.Log("Data deleted from: " + tempPath.Replace("/", "\\"));
            success = true;
        }
        catch (Exception e)
        {
            Debug.LogWarning("Failed To Delete Data: " + e.Message);
        }

        return success;
    }
}

用法:

要保存的示例类:

[Serializable]
public class PlayerInfo
{
    public List<int> ID = new List<int>();
    public List<int> Amounts = new List<int>();
    public int life = 0;
    public float highScore = 0;
}

保存数据:

PlayerInfo saveData = new PlayerInfo();
saveData.life = 99;
saveData.highScore = 40;

//Save data from PlayerInfo to a file named players
DataSaver.saveData(saveData, "players");

加载数据:

PlayerInfo loadedData = DataSaver.loadData<PlayerInfo>("players");
if (loadedData == null)
{
    return;
}

//Display loaded Data
Debug.Log("Life: " + loadedData.life);
Debug.Log("High Score: " + loadedData.highScore);

for (int i = 0; i < loadedData.ID.Count; i++)
{
    Debug.Log("ID: " + loadedData.ID[i]);
}
for (int i = 0; i < loadedData.Amounts.Count; i++)
{
    Debug.Log("Amounts: " + loadedData.Amounts[i]);
}

删除数据:

DataSaver.deleteData("players");