QT加载qss

QString CommonHelper::setStyle(const QString &style)
{
    QByteArray str;
    QFile qss(style);
    qss.open(QFile::ReadOnly|QFile::Text);
    if(qss.isOpen())
    {
        str = qss.readAll();
        qss.close();
    }
    return QString::fromUtf8(str);
}

QString style = CommonHelper::setStyle(":/qss/global_style.css");
    setStyleSheet(style);