qt 怎么让程序自带字体，就是说在操作系统上没有的字体

QString Widget::loadFontFamilyFromTTF()
{
    static QString font;
    static bool loaded = false;
    if(!loaded)
    {
        loaded = true;
        int loadedFontID = QFontDatabase::addApplicationFont(":/new_font.FON");
        QStringList loadedFontFamilies = QFontDatabase::applicationFontFamilies(loadedFontID);
        if(!loadedFontFamilies.empty())
            font = loadedFontFamilies.at(0);
    }
    return font;
}