qpushbutton 不同的字不同大小和顔色

由于不同的字用不同的样式，所以需要用到html来设定：

//add take buttons with tips//设置text和样式    QTextDocument Text_finish;    Text_finish.setHtml("<font size='28' color='white'>取货完成</font><br><font size='4' color='white'>请先関好盖并拉好门</font>");//放入pixmap中    QPixmap pixmap_finish(Text_finish.size().width(), Text_finish.size().height());    pixmap_finish.fill( Qt::transparent );//使用painter画    QPainter painter_finish( &pixmap_finish );    Text_finish.drawContents(&painter_finish, pixmap_finish.rect());    QIcon ButtonIcon_finish(pixmap_finish);    ui->btn_take_takepage_finish->setIcon(ButtonIcon_finish);    ui->btn_take_takepage_finish->setIconSize(pixmap_finish.rect().size());