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unity-IOSpersistentDataPath訪問被拒絕//無法打開數據庫

[英]Unity - IOS persistentDataPath access denied // Could not open database

我試圖從我的streamingAssets恢復文件,並在persistentDataPath中制作一個副本。

問題是iOS拒絕了對persistentDataPath的訪問,因此我無法編寫該文件,有人可以告訴我為什么嗎?

碼:

#elif UNITY_IOS
if (File.Exists(Application.dataPath + "/Raw/" + StaticDatas.databaseName))
{
    byte[] bytes = null;
       if (File.Exists(Application.dataPath + "/Raw/" + StaticDatas.databaseName))
       {
        Debug.Log(Application.dataPath + "/Raw/" + StaticDatas.databaseName);
        Debug.Log(StaticDatas.databasePath + StaticDatas.databaseName);
           using (FileStream fileStream = File.OpenRead(Application.dataPath + "/Raw/" + StaticDatas.databaseName))
           {
               bytes = new byte[fileStream.Length];
               fileStream.Read(bytes,0,int.Parse(fileStream.Length+""));
               fileStream.Close();
               fileStream.Dispose();
           }
           FileStream fs = File.Create(StaticDatas.databasePath + StaticDatas.databaseName);
           fs.Write(bytes, 0, bytes.Length);
       }
         _connection = new SQLiteConnection(filePath, SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create);
        CreateDB();
}

錯誤:拒絕訪問路徑/var/mobile/containers/dta/application/manythings/DocumentsDatabaseName.db“

iOS:9.5.3 Unity:5.5.0f3

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更新:StaticDatas.databasePath = persistentDataPath

-------------------------------------------------- --------------

更新2:

好吧,我完全迷路了...

這是我的代碼:

#elif UNITY_IOS

string basePath = Path.Combine(Application.dataPath + "Raw" , StaticDatas.databaseName);
string targetPath = Path.Combine(StaticDatas.databasePath , StaticDatas.databaseName );
Debug.Log(basePath);
Debug.Log(targetPath);
if (File.Exists(basePath))
{
    byte[] bytes = null;

        Debug.Log("base path exists");
           using (FileStream fileStream = File.OpenRead(basePath))
           {
               Debug.Log("create byte array");
               bytes = new byte[fileStream.Length];
               Debug.Log(" READ BYTES");
               fileStream.Read(bytes,0,int.Parse(fileStream.Length+""));
               Debug.Log(" CLOSE");
               fileStream.Close();
               Debug.Log("DISPOSE");
               fileStream.Dispose();
           }
           Debug.Log(" Check if dir exists");
          /* if (!Directory.Exists(StaticDatas.databasePath + "/AnnotationTest.app/database/"))
           {
                Debug.Log(" create folder");
                Directory.CreateDirectory(StaticDatas.databasePath + "/AnnotationTest.app/database/");
           }*/
           Debug.Log("Open file");
           FileStream fs = File.Open(targetPath, FileMode.OpenOrCreate);
         Debug.Log("Write file");
           fs.Write(bytes, 0, bytes.Length);
           Debug.Log(" CLOSE STRREAM");
           fs.Close();
       Debug.Log("Connec close");
         _connection = new SQLiteConnection(targetPath, SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create);
         Debug.Log("sql connect");
        CreateDB();
        Debug.Log(" db made");
}



if (File.Exists("file:" + Application.dataPath + "/Raw/" + StaticDatas.databaseName));
{
    Debug.Log("file datapath raw databasename");
          byte[] bytes = null;

        Debug.Log("base path exists");
           using (FileStream fileStream = File.OpenRead("file:" + Application.dataPath + "/Raw/" + StaticDatas.databaseName))
           {
               Debug.Log("create byte array");
               bytes = new byte[fileStream.Length];
               Debug.Log(" READ BYTES");
               fileStream.Read(bytes,0,int.Parse(fileStream.Length+""));
               Debug.Log(" CLOSE");
               fileStream.Close();
               Debug.Log("DISPOSE");
               fileStream.Dispose();
           }
            FileStream fs = File.Open(targetPath, FileMode.OpenOrCreate);
         Debug.Log("Write file");
           fs.Write(bytes, 0, bytes.Length);
           Debug.Log(" CLOSE STRREAM");
           fs.Close();

         _connection = new SQLiteConnection(targetPath, SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create);
        CreateDB();
}

#else
            var loadDb = StaticDatas.databasePath + StaticDatas.databaseName;
            File.Copy(loadDb, filePath);
         _connection = new SQLiteConnection(filePath, SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create);
        CreateDB();
#endif

第一個if語句確實起作用了一段時間(不使用combine ),但是現在起作用了。

第二個返回true( Exists ),但是當到達using語句時,它說“找不到路徑的一部分”(即使在if語句中找到了wtf?)

-------------------------------------------------- --------------

更新3

這是一個奇跡! 我找到了! 好了,現在,SQLite無法打開數據庫,但是我找到了!

string bpa = Application.dataPath + "/Raw/" + StaticDatas.databaseName;

if (File.Exists(bpa))
{
    byte[] b = null;
    using (FileStream fs = File.OpenRead(bpa))
    {
        b = new byte[fs.Length];
        fs.Read(b, 0, int.Parse(fs.Length+""));
        fs.Close();
        fs.Dispose();
    }
    FileStream fsa = File.Open(targetPath, FileMode.OpenOrCreate);
    fsa.Write(b,0, b.Length);
    fsa.Close();
    _connection = new SQLiteConnection(targetPath, SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create);
        CreateDB();
}
else if (File.Exists(basePath))
{

byte[] b = null;
    using (FileStream fs = File.OpenRead(basePath))
    {
        b = new byte[fs.Length];
        fs.Read(b, 0, int.Parse(fs.Length+""));
        fs.Close();
        fs.Dispose();
    }
    FileStream fsa = File.Open(targetPath, FileMode.OpenOrCreate);
    fsa.Write(b,0, b.Length);
    fsa.Close();
    _connection = new SQLiteConnection(targetPath, SQLiteOpenFlags.ReadWrite | SQLiteOpenFlags.Create);
        CreateDB();
}

因此正確的路徑似乎是:

 string bpa = Application.dataPath + "/Raw/" + StaticDatas.databaseName;

-------------------------------------------------- --------------

更新4:

好的,我想我知道問題出在哪里(即使我不理解):

現在,我可以從流媒體資產中獲取數據並將其復制到persistentDatapath,但是當我與該文件創建連接時,SQLite會引發異常:

Could not open database file

有人知道為什么嗎?

-------------------------------------------------- --------------更新5:

我做一個組合來創建路徑“ targetPath”,在日志中,它顯示為“ /var/mobile/Container/Data/Application/manylettersanddigits/Documents/database.db”

但是,在SQLException中,它顯示相同的內容,但在Documents和database.db之間沒有斜線

在IOS上,可以通過以下方式訪問流媒體資產的相關路徑:

Application.dataPath + "/Raw/" + StaticDatas.databaseName;

在這種情況下,造成“無法打開數據庫文件”的原因是因為我在該方法中創建了2個連接(令我感到羞恥)。的確,第二個正在使之成為buggig(兩者均相同),這是我的錯誤。

謝謝大家。

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