QPushButton* startBtn = new QPushButton(tr("开 始"), deviceInfoGrpBox);
startBtn->setGeometry(QRect(QPoint(300, 20), QSize(80, 80)));
startBtn->setFont(QFont("Microsoft YaHei", 10, 75));
startBtn->setStyleSheet("color: white; background-color: rgb(100, 200, 100);");
