ios13 sqlite attempt to write a readonly database

[Bayesky]

I have copied a database from qml.qrc to /Documents/databases, like this:

        QString dir;
        QDir current_dir;

        
        dir = QDir::homePath()+"/Documents/databases";
        if(current_dir.exists(dir) == false){
            current_dir.mkpath(dir);
            QFile::copy(":/MyDataBase.db", QDir::homePath()+"/Documents/databases/MyDataBase.db");
        }

And when I update the table, it said that

QSqlError("8", "Unable to fetch row", "attempt to write a readonly database")

What could I do for that?

[Bayesky]

I found that I must set permission after copy it