unity sqlite数据库（二）——具体使用，坑爹的路径

//数据库连接池
private static SqliteConnection dbConnection;

//数据库语句执行器
private static SqliteCommand dbCommand;

//数据库数据读取器
private static SqliteDataReader dbReader;

private static string connectionStr;<pre name="code" class="csharp">dbConnection = new SqliteConnection(connectionStr);
dbConnection.Open();

#region 不同平台下获取数据库文件路径
#if UNITY_EDITOR || UNITY_STANDALONE_WIN
connectionStr = "URI=file:" + UriUtils.GetDBPath;
#elif UNITY_ANDROID
//移动端在沙盒中才有访问权限
string filepath = Application.persistentDataPath  +  androidDbTo;
if(!File.Exists(filepath))// if it doesn't ->
{
#region 文件拷贝方法1 在ios下似乎存在死循环的问题（待确定）
// 从StreamingAssets directory中加载数据库文件
WWW loadDB = new WWW(Application.streamingAssetsPath +  androidDb);
while(!loadDB.isDone) {}  // 注意，不要死循环了
//数据库文件
File.WriteAllBytes(filepath, loadDB.bytes);
#endregion
}
connectionStr = "URI=file:" + filepath;
#elif  UNITY_IOS

string filepath = Application.persistentDataPath+iosDbTo;
#region //文件拷贝方法2
FileInfo t = new FileInfo(Application.streamingAssetsPath+iosDb);
t.CopyTo(filepath, true);
#endregion
#region //文件拷贝方法3
//			File.WriteAllBytes(filepath, File.ReadAllBytes(Application.streamingAssetsPath + "//" + "3dh_all.db"));
#endregion

#region //文件拷贝方法4
//			TextAsset txt = Resources.Load("3dh_all" , typeof(TextAsset)) as TextAsset ;
//			File.WriteAllBytes(filepath,txt.bytes) ;
#endregion
#region //文件拷贝方法5
//在Resources文件家中load出来，然后拷贝到persistentDataPath路径下
#endregion
connectionStr = @"Data Source=" + filepath;
#endif
#endregion

<span style="background-color: rgb(255, 255, 102);">connectionStr = @"Data Source=" + filepath</span><span style="background-color: rgb(255, 0, 0);">;</span>