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();
}
return font;
}