pyqt5利用qcombo box的信号扫描串口列表

在MainWindow下开启

self.centralwidget.setMouseTracking(True)
self.lcc_uart_port.setMouseTracking(True)
self.fluke_uart_port.setMouseTracking(True)

利用combo box的activated信号连接槽函数

self.lcc_uart_port.activated.connect(self.scan_uart_port)
self.fluke_uart_port.activated.connect(self.scan_uart_port)

实现槽函数

    def scan_uart_port(self):
        new_name_list = []
        scan_port_list = []
        uart_port_num = QSerialPortInfo.availablePorts()
        for info in uart_port_num:
            uart_str_name = info.portName().split()
            uart_str_desc = info.description().split()
            scan_port_list.append(uart_str_name[0] + ' ' + uart_str_desc[0])
            if len(scan_port_list) > 0:
                for i in scan_port_list:
                    if i not in new_name_list:
                        new_name_list.append(i)
                else:
                    scan_port_list = new_name_list
        if scan_port_list != self.uart_name_list:
            self.uart_name_list = scan_port_list
            self.lcc_uart_port.clear()
            self.fluke_uart_port.clear()
            list_len = len(self.uart_name_list)
            for j in range(0, list_len):
                self.lcc_uart_port.addItem(self.uart_name_list[j])
                self.fluke_uart_port.addItem(self.uart_name_list[j])

这样每次选择combo box的item都会扫描串口了，插拔串口就不用重开软件了。