1、父窗体样式不生效?this->setAttribute(Qt::WA_StyledBackground);2、父窗样式体影响子控件?this->setStyleSheet("#objname{background-color: rgb(190,190,190)});3、子控件qlinedit设置透明无边框?ui->btnLoad->setStyleSheet("background:transparent;border-width:0;border-style:outset");