单位节省负荷功能:使用Application.persistentDataPath

Question

我是一个初学者团结开发人员。我使用支持存储函数的资产创建了Save & Load函数。通过在Application.personDataPath/文件夹中创建Json形式的文件来保存它，这是一种常见的方法。

问题是它在Unity中运行得很好，但是当我把它构建成一个完整的游戏时，它就不是了。当我在Application.persistantDataPath/ (它是目标文件夹)中查找时，不会创建任何内容。

是否有您经常使用的解决方案或诊断方法？

有关​的更多信息，请参见下面的代码。我使用了从购买的名为“Corgi Engine”的资产。

设置文件的路径

/// the method to use when saving and loading files (has to be the same at both times of course)

public static IMMSaveLoadManagerMethod saveLoadMethod = new MMSaveLoadManagerMethodBinary();

/// the default top level folder the system will use to save the file

private const string _baseFolderName = "/MMData/";

/// the name of the save folder if none is provided

private const string _defaultFolderName = "MMSaveLoadManager";

​

/// <summary>

/// Determines the save path to use when loading and saving a file based on a folder name.

static string DetermineSavePath(string folderName = _defaultFolderName)

{

string savePath;

// depending on the device we're on, we assemble the path

if (Application.platform == RuntimePlatform.IPhonePlayer)

{

savePath = Application.persistentDataPath + _baseFolderName;

} 

else 

{

savePath = Application.persistentDataPath + _baseFolderName;

}

#if UNITY_EDITOR

savePath = Application.dataPath + _baseFolderName;

#endif

​

savePath = savePath + folderName + "/";

return savePath;

}

创建目录并保存

/// <summary>

/// Save the specified saveObject, fileName and foldername into a file on disk.

public static void Save(object saveObject, string fileName, string foldername = _defaultFolderName)

{

string savePath = DetermineSavePath(foldername);

string saveFileName = DetermineSaveFileName(fileName);

// if the directory doesn't already exist, we create it

if (!Directory.Exists(savePath))

{

Directory.CreateDirectory(savePath);

}

// we serialize and write our object into a file on disk

​

FileStream saveFile = File.Create(savePath + saveFileName);

​

saveLoadMethod.Save(saveObject, saveFile);

saveFile.Close();

}

向Json的转换与的保存

/// <summary>

/// Saves the specified object at the specified location after converting it to json

public void Save(object objectToSave, FileStream saveFile)

{

string json = JsonUtility.ToJson(objectToSave);

// if you prefer using NewtonSoft's JSON lib uncomment the line below and commment the line above

//string json = Newtonsoft.Json.JsonConvert.SerializeObject(objectToSave);

StreamWriter streamWriter = new StreamWriter(saveFile);

streamWriter.Write(json);

streamWriter.Close();

saveFile.Close();

Debug.Log(objectToSave.GetType());

}

Answer 1

正如您的代码所述，您在编辑器模式下使用Application.dataPath (资产文件夹)，而在Android和iOS中使用Application.persistentDataPath。这就是为什么结果是不同的。

查看第一和第二的文档。查看在每种情况下应将文件存储在何处。

如果仍然无法在Android中找到您的文件，请尝试运行时调试运行Debug.Log(Application.persistentDataPath);或将其分配给场景中的某个文本对象。