void SerialPortUi::radioButton_CRC_clicked() { QRadioButton *rtn = dynamic_cast<QRadioButton*>(sender()); int key = rtn->whatsThis().toInt(); switch (key) { case 1: ui->textBrowser->append("CRCNO"); break; case 2: ui->textBrowser->append("CRC8"); break; case 3: ui->textBrowser->append("CRC16"); break; default: break; } }