Qt加载字体

QFontDatabase database;
foreach (const QString &family, database.families()) {
    qDebug()<<family;
}

QFont font("family");
QApplication::setFont(font);

int fontId = QFontDatabase::addApplicationFont("font.ttc");
QStringList fontIDs = QFontDatabase::applicationFontFamilies(fontId);
if (! fontIDs.isEmpty()) {
    QFont font(fontIDs.first());
    QApplication::setFont(font);
}
else {
    qDebug()<<"Failed to load font.";
}