QComboBox *cmBox = new QComboBox(); cmBox->setStyleSheet("QComboBox{font-family:‘微软雅黑‘;font-size:9; border:1px solid lightgray;}" "QComboBox QAbstractItemView::item {min-height: 20px;}" "QComboBox::drop-down{border-left-width: 1px;border-left-color: lightgray;border-left-style: solid; border-top-right-radius: 3px;border-bottom-right-radius: 3px;subcontrol-origin: padding;subcontrol-position: top right; width:20px;}" "QComboBox::down-arrow{image:url(:/FlightSimCaptain/Resources/down_arrow.png)}" "QComboBox::down-arrow:hover{image:url(:/FlightSimCaptain/Resources/down_arrow_press.png)}" "QComboBox::down-arrow:pressed{image:url(:/FlightSimCaptain/Resources/down_arrow_press.png)}"); cmBox->addItem("04"); cmBox->addItem("22"); QStyledItemDelegate *delegate = new QStyledItemDelegate(this); cmBox->setItemDelegate(delegate);