我正在尝试从我的 streamingAssets 中恢复一个文件并在 persistentDataPath 中复制它。
问题是iOS拒绝访问persistentDataPath,所以我无法写入文件,谁能告诉我为什么?
代码:
#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();
}
错误: 访问路径/var/mobile/containers/dta/application/manythings/DocumentsDatabaseName.db 被拒绝
IOS:9.5.3 统一:5.5.0f3
------------------------------------------ --------------------
更新:StaticDatas.databasePath = persistentDataPath
------------------------------------------ --------------------
更新 2:
好吧,我完全迷路了......
这是我的代码:
#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
第一个 if 语句确实工作了一会儿(没有 combine
),但现在,花生。
第二个返回true(Exists
),但是当它到达using语句时,它说“找不到路径的一部分”(即使它在if语句中找到它, wtf?)
------------------------------------------ --------------------
更新 3
这是一个奇迹!我找到了! 嗯,现在,SQLite 无法打开数据库,但我找到了!
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();
}
所以正确的路径似乎是:
string bpa = Application.dataPath + "/Raw/" + StaticDatas.databaseName;
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更新 4:
好的,我想我知道问题出在哪里(即使我不明白):
我现在可以从流媒体 Assets 中获取数据并将其复制到persistentDatapath,但是当我创建与文件的连接时,SQLite 会抛出异常:
Could not open database file
有人知道为什么吗?
------------------------------------------ -------------------- 更新 5:
我做了一个组合来创建路径“targetPath”,在日志中,它显示“/var/mobile/Container/Data/Application/manylettersanddigits/Documents/database.db”
但是,在 SQLException 中,它显示相同,但 Documents 和 database.db 之间没有斜线
在 IOS 上,可以通过以下方式访问流媒体 Assets 的当前路径:
Application.dataPath + "/Raw/" + StaticDatas.databaseName;
在这种情况下,“无法打开数据库文件”是因为我在方法中创建了 2 个连接(我感到羞耻) 事实上,第二个是让它成为错误(两者的变量相同),这是我的一个错误。
谢谢大家。
关于c# - unity - IOS persistentDataPath access denied//无法打开数据库,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/42245393/
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