贾167 2024-04-10 22:51 采纳率: 87.5%
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已结题

pyqt--线程小问题

PYQT 中radiobutton点击创建线程后卡住

logic_code


```python
from PyQt5.QtWidgets import QMainWindow, QApplication
from PyQt5.QtCore import QTimer, QIODevice
from mywindow import Ui_MainWindow  # 导入UI界面文件
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
from serial.tools import list_ports
from PyQt5.QtCore import QTimer, QThread, pyqtSignal
from serial.tools import list_ports
from datetime import datetime
import serial

class RefreshSerialPortsThread(QThread):
    ports_refreshed = pyqtSignal(list)

    def run(self):
        while True:
            port_list = [p.device for p in list_ports.comports()]  # 此处获取串口列表的逻辑需要根据实际情况编写
            self.ports_refreshed.emit(port_list)
            self.msleep(1000)  # 设置适当的延时以控制刷新频率

class SerialThread(QThread):
    print(1)
    data_received = pyqtSignal(str)

    def __init__(self, serial_port, parent=None):
        super(SerialThread, self).__init__(parent)
        self.serial_port = serial_port
        self.running = True  # 添加一个标志来指示线程是否应该继续运行

    def run(self):
        while self.running:  # 使用标志来控制循环
            try:
                if self.serial_port.isOpen():  # 检查串口是否打开
                    data = self.serial_port.readline().decode().strip()
                    if data:
                        self.data_received.emit(data)
                    else:
                        print("err")
                else:

                    print("Serial port is closed.")  # 输出提示信息
                    self.running = False  # 设置标志以退出循环
            except ValueError as e:
                    print(f"Error converting data to float: {e}")
            except Exception as e:
                    print(f"Exception in SerialThread: {e}")
    # def run(self):
    #     if not self.serial_port.open(QIODevice.ReadOnly):
    #         print("Error opening serial port.")
    #         return
    #
    #     while self.serial_port.isOpen():
    #         print(2)
    #         if self.serial_port.waitForReadyRead(100):
    #             data = self.serial_port.readAll().data().decode()
    #             self.data_received.emit(data)

    def stop(self):
        self.running = False  # 设置标志以退出循环


class COM_MainWindow(QMainWindow, Ui_MainWindow):
    def __init__(self):
        super(COM_MainWindow, self).__init__()
        Ui_MainWindow.setupUi(self, self)
        self.serial_open = False
        self.serial_port = None
        self.serial_thread = None
        self.timer = QTimer()

        self.baud_rate = 115200
        self.data_bits = 8
        self.stop_bits = 1
        self.timestamps = []
        self.data = []


        self.pushButton.clicked.connect(self.save_window)  # 连接按钮点击信号和槽函数
        self.pushButton_2.clicked.connect(self.clear_receive)
        self.pushButton_3.clicked.connect(self.send_data)
        self.pushButton_4.clicked.connect(self.clear_send)
        self.pushButton_5.clicked.connect(self.stop_send)

        self.timer.timeout.connect(self.send_data)  # 定时器超时触发发送数据

        self.radioButton.clicked.connect(self.toggle_serial)

        #实现串口的不停检测
        self.refresh_thread = RefreshSerialPortsThread()
        self.refresh_thread.ports_refreshed.connect(self.update_serial_ports)
        self.refresh_thread.start()

    def update_serial_ports(self, port_list):
        # 更新界面上的串口列表
        self.comboBox.clear()
        self.comboBox.addItems(port_list)

    def save_window(self):
        # 保存窗口逻辑代码
        pass

    def clear_receive(self):
        # 清除接收逻辑代码
        pass

    def send_data(self):
        # 发送数据逻辑代码
        pass

    def clear_send(self):
        # 清除发送逻辑代码
        pass

    def stop_send(self):
        # 停止发送逻辑代码
        pass

    def open_serial(self):
        port_name = self.comboBox.currentText()
        self.baud_rate = int(self.baud_rate_box.currentText())
        data_bits_text = self.data_bit_box.currentText()
        self.data_bits = serial.EIGHTBITS if data_bits_text == "8" else serial.SEVENBITS
        stop_bits_text = self.stop_bit_box.currentText()
        self.stop_bits = serial.STOPBITS_ONE if stop_bits_text == "1" else \
            serial.STOPBITS_ONE_POINT_FIVE if stop_bits_text == "1.5" else \
                serial.STOPBITS_TWO

        try:
            print(6)
            self.serial_port = serial.Serial(port=port_name, baudrate=self.baud_rate, timeout=0.1)

            self.serial_port.bytesize = self.data_bits
            self.serial_port.stopbits = self.stop_bits
            print(self.serial_port)

            self.serial_thread = SerialThread(self.serial_port)
            self.serial_thread.data_received.connect(self.handle_data_received)
            self.serial_thread.start()
            self.timer.start(1000)
            print("Thread started successfully.")

            #self.timer.start(500)

            self.serial_open = True
        except serial.SerialException as e:
            print(f"Error opening serial port: {e}")

    def stop_serial(self):
        if self.serial_thread is not None:
            self.serial_thread.quit()
            print("thead success quit")
            self.serial_thread.wait()
        if self.serial_port is not None:
            self.serial_port.close()
        self.timer.stop()
        self.serial_open = False

    def toggle_serial(self):
        print(5)
        #print("Button text before setText:", self.radioButton.text())
        if self.serial_open:
            self.stop_serial()
            self.radioButton.setText("串口关闭")
        else:
            self.open_serial()
            self.radioButton.setText("串口开启")

    def refresh_serial_ports(self):
        port_list = [p.device for p in list_ports.comports()]
        print(port_list)
        self.comboBox.clear()
        self.comboBox.addItems(port_list)

    def handle_data_received(self, data):
        try:
            timestamp = datetime.now().strftime('%H:%M:%S')
            value = float(data)
            self.timestamps.append(timestamp)
            self.data.append(value)
        except ValueError as e:
            print(f"Error converting data to float: {e}")


if __name__ == "__main__":
    QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling)
    App = QApplication(sys.argv)  # 创建QApplication对象，作为GUI主程序入口
    #aw = Ui_MainWindow()  # 创建主窗体对象，实例化Ui_MainWindow
    w = COM_MainWindow()  # 实例化QMainWindow类
    #aw.setupUi(w)  # 主窗体对象调用setupUi方法，对QMainWindow对象进行设置
    w.show()  # 显示主窗体
    # App.exit()
    sys.exit(App.exec_())  # 循环中等待退出程序 当关闭界面时，只会关闭当前的GUI线程，如果有其他线程在运行是不会关闭的，
    #os.exit(App.exec_()) #实现关闭界面即退出系统。



layout_code

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'D:\python\Lib\site-packages\qt5_applications\Qt\bin\COMui.ui'
#
# Created by: PyQt5 UI code generator 5.15.9
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets
import sys
from PyQt5.QtWidgets import QApplication, QMainWindow

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(786, 827)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.com_sel_label = QtWidgets.QLabel(self.centralwidget)
        self.com_sel_label.setGeometry(QtCore.QRect(2, 13, 48, 16))
        self.com_sel_label.setObjectName("com_sel_label")
        self.comboBox = QtWidgets.QComboBox(self.centralwidget)
        self.comboBox.setGeometry(QtCore.QRect(70, 12, 67, 19))
        self.comboBox.setObjectName("comboBox")
        self.com_baud_rate = QtWidgets.QLabel(self.centralwidget)
        self.com_baud_rate.setGeometry(QtCore.QRect(2, 62, 36, 16))
        self.com_baud_rate.setObjectName("com_baud_rate")
        self.stop_bits = QtWidgets.QLabel(self.centralwidget)
        self.stop_bits.setGeometry(QtCore.QRect(2, 87, 36, 16))
        self.stop_bits.setObjectName("stop_bits")
        self.stop_bit_box = QtWidgets.QComboBox(self.centralwidget)
        self.stop_bit_box.setGeometry(QtCore.QRect(70, 86, 67, 19))
        self.stop_bit_box.setObjectName("stop_bit_box")
        self.stop_bit_box.addItem("")
        self.stop_bit_box.addItem("")
        self.stop_bit_box.addItem("")
        self.label_6 = QtWidgets.QLabel(self.centralwidget)
        self.label_6.setGeometry(QtCore.QRect(10, 30, 54, 12))
        self.label_6.setText("")
        self.label_6.setObjectName("label_6")
        self.port_status = QtWidgets.QLabel(self.centralwidget)
        self.port_status.setGeometry(QtCore.QRect(2, 38, 48, 16))
        self.port_status.setObjectName("port_status")
        self.radioButton = QtWidgets.QRadioButton(self.centralwidget)
        self.radioButton.setGeometry(QtCore.QRect(70, 38, 71, 16))
        self.radioButton.setObjectName("radioButton")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(70, 160, 67, 19))
        self.pushButton.setObjectName("pushButton")
        self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_2.setGeometry(QtCore.QRect(70, 185, 67, 19))
        self.pushButton_2.setObjectName("pushButton_2")
        self.checkBox = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox.setGeometry(QtCore.QRect(2, 260, 83, 16))
        self.checkBox.setObjectName("checkBox")
        self.checkBox_3 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_3.setGeometry(QtCore.QRect(2, 240, 41, 16))
        self.checkBox_3.setObjectName("checkBox_3")
        self.checkBox_5 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_5.setGeometry(QtCore.QRect(2, 210, 59, 16))
        self.checkBox_5.setObjectName("checkBox_5")
        self.textEdit = QtWidgets.QTextEdit(self.centralwidget)
        self.textEdit.setGeometry(QtCore.QRect(140, 0, 641, 301))
        self.textEdit.setObjectName("textEdit")
        self.pushButton_3 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_3.setGeometry(QtCore.QRect(70, 230, 67, 19))
        self.pushButton_3.setObjectName("pushButton_3")
        self.pushButton_4 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_4.setGeometry(QtCore.QRect(70, 210, 67, 19))
        self.pushButton_4.setObjectName("pushButton_4")
        self.pushButton_5 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_5.setGeometry(QtCore.QRect(70, 250, 67, 19))
        self.pushButton_5.setObjectName("pushButton_5")
        self.checkBox_6 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_6.setGeometry(QtCore.QRect(2, 280, 91, 16))
        self.checkBox_6.setObjectName("checkBox_6")
        self.checkBox_7 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_7.setGeometry(QtCore.QRect(2, 300, 71, 16))
        self.checkBox_7.setObjectName("checkBox_7")
        self.label_8 = QtWidgets.QLabel(self.centralwidget)
        self.label_8.setGeometry(QtCore.QRect(20, 320, 24, 16))
        self.label_8.setObjectName("label_8")
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(50, 320, 41, 19))
        self.lineEdit.setObjectName("lineEdit")
        self.label_9 = QtWidgets.QLabel(self.centralwidget)
        self.label_9.setGeometry(QtCore.QRect(100, 320, 16, 16))
        self.label_9.setObjectName("label_9")
        self.tableWidget = QtWidgets.QTableWidget(self.centralwidget)
        self.tableWidget.setGeometry(QtCore.QRect(140, 311, 641, 101))
        self.tableWidget.setObjectName("tableWidget")
        self.tableWidget.setColumnCount(3)
        self.tableWidget.setRowCount(0)
        item = QtWidgets.QTableWidgetItem()
        self.tableWidget.setHorizontalHeaderItem(0, item)
        item = QtWidgets.QTableWidgetItem()
        self.tableWidget.setHorizontalHeaderItem(1, item)
        item = QtWidgets.QTableWidgetItem()
        self.tableWidget.setHorizontalHeaderItem(2, item)
        self.widget = QtWidgets.QWidget(self.centralwidget)
        self.widget.setGeometry(QtCore.QRect(150, 490, 120, 80))
        self.widget.setObjectName("widget")
        self.data_bits = QtWidgets.QLabel(self.centralwidget)
        self.data_bits.setGeometry(QtCore.QRect(2, 112, 36, 16))
        self.data_bits.setObjectName("data_bits")
        self.data_bit_box = QtWidgets.QComboBox(self.centralwidget)
        self.data_bit_box.setGeometry(QtCore.QRect(70, 111, 67, 19))
        self.data_bit_box.setObjectName("data_bit_box")
        self.data_bit_box.addItem("")
        self.data_bit_box.addItem("")
        self.data_bit_box.addItem("")
        self.data_bit_box.addItem("")
        self.verify_bits = QtWidgets.QLabel(self.centralwidget)
        self.verify_bits.setGeometry(QtCore.QRect(2, 137, 36, 16))
        self.verify_bits.setObjectName("verify_bits")
        self.baud_rate_box = QtWidgets.QComboBox(self.centralwidget)
        self.baud_rate_box.setGeometry(QtCore.QRect(70, 61, 67, 19))
        self.baud_rate_box.setObjectName("baud_rate_box")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.baud_rate_box.addItem("")
        self.comboBox_5 = QtWidgets.QComboBox(self.centralwidget)
        self.comboBox_5.setGeometry(QtCore.QRect(70, 136, 67, 19))
        self.comboBox_5.setObjectName("comboBox_5")
        self.comboBox_5.addItem("")
        self.comboBox_5.addItem("")
        self.comboBox_5.addItem("")
        self.checkBox_2 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_2.setGeometry(QtCore.QRect(2, 190, 41, 16))
        self.checkBox_2.setObjectName("checkBox_2")
        self.checkBox_4 = QtWidgets.QCheckBox(self.centralwidget)
        self.checkBox_4.setGeometry(QtCore.QRect(2, 160, 71, 16))
        self.checkBox_4.setObjectName("checkBox_4")
        MainWindow.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "ComWindow"))
        self.com_sel_label.setText(_translate("MainWindow", "串口选择"))
        self.com_baud_rate.setText(_translate("MainWindow", "波特率"))
        self.stop_bits.setText(_translate("MainWindow", "停止位"))
        self.stop_bit_box.setItemText(0, _translate("MainWindow", "1"))
        self.stop_bit_box.setItemText(1, _translate("MainWindow", "1.5"))
        self.stop_bit_box.setItemText(2, _translate("MainWindow", "2"))
        self.port_status.setText(_translate("MainWindow", "串口状态"))
        self.radioButton.setText(_translate("MainWindow", "串口关闭"))
        self.pushButton.setText(_translate("MainWindow", "保存窗口"))
        self.pushButton_2.setText(_translate("MainWindow", "清除接收"))
        self.checkBox.setText(_translate("MainWindow", "hex显示"))
        self.checkBox_3.setText(_translate("MainWindow", "RTS"))
        self.checkBox_5.setText(_translate("MainWindow", "时间戳"))
        self.pushButton_3.setText(_translate("MainWindow", "发送"))
        self.pushButton_4.setText(_translate("MainWindow", "清除发送"))
        self.pushButton_5.setText(_translate("MainWindow", "停止发送"))
        self.checkBox_6.setText(_translate("MainWindow", "hex发送"))
        self.checkBox_7.setText(_translate("MainWindow", "定时发送"))
        self.label_8.setText(_translate("MainWindow", "周期"))
        self.label_9.setText(_translate("MainWindow", "ms"))
        item = self.tableWidget.horizontalHeaderItem(0)
        item.setText(_translate("MainWindow", "单条发送"))
        item = self.tableWidget.horizontalHeaderItem(1)
        item.setText(_translate("MainWindow", "多条发送"))
        item = self.tableWidget.horizontalHeaderItem(2)
        item.setText(_translate("MainWindow", "帮助"))
        self.data_bits.setText(_translate("MainWindow", "数据位"))
        self.data_bit_box.setItemText(0, _translate("MainWindow", "8"))
        self.data_bit_box.setItemText(1, _translate("MainWindow", "7"))
        self.data_bit_box.setItemText(2, _translate("MainWindow", "6"))
        self.data_bit_box.setItemText(3, _translate("MainWindow", "5"))
        self.verify_bits.setText(_translate("MainWindow", "校验位"))
        self.baud_rate_box.setItemText(0, _translate("MainWindow", "19200"))
        self.baud_rate_box.setItemText(1, _translate("MainWindow", "38400"))
        self.baud_rate_box.setItemText(2, _translate("MainWindow", "43000"))
        self.baud_rate_box.setItemText(3, _translate("MainWindow", "57600"))
        self.baud_rate_box.setItemText(4, _translate("MainWindow", "76800"))
        self.baud_rate_box.setItemText(5, _translate("MainWindow", "115200"))
        self.baud_rate_box.setItemText(6, _translate("MainWindow", "128000"))
        self.baud_rate_box.setItemText(7, _translate("MainWindow", "230400"))
        self.baud_rate_box.setItemText(8, _translate("MainWindow", "256000"))
        self.baud_rate_box.setItemText(9, _translate("MainWindow", "460800"))
        self.baud_rate_box.setItemText(10, _translate("MainWindow", "921600"))
        self.baud_rate_box.setItemText(11, _translate("MainWindow", "1000000"))
        self.baud_rate_box.setItemText(12, _translate("MainWindow", "2000000"))
        self.baud_rate_box.setItemText(13, _translate("MainWindow", "3000000"))
        self.comboBox_5.setItemText(0, _translate("MainWindow", "None"))
        self.comboBox_5.setItemText(1, _translate("MainWindow", "Odd"))
        self.comboBox_5.setItemText(2, _translate("MainWindow", "Even"))
        self.checkBox_2.setText(_translate("MainWindow", "DTR"))
        self.checkBox_4.setText(_translate("MainWindow", "自动保存"))


# if __name__ == "__main__":
#     QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling)
#     App = QApplication(sys.argv)  # 创建QApplication对象，作为GUI主程序入口
#     aw = Ui_MainWindow()  # 创建主窗体对象，实例化Ui_MainWindow
#     w = QMainWindow()  # 实例化QMainWindow类
#     aw.setupUi(w)  # 主窗体对象调用setupUi方法，对QMainWindow对象进行设置
#     w.show()  # 显示主窗体
#     # App.exit()
#     sys.exit(App.exec_())  # 循环中等待退出程序 当关闭界面时，只会关闭当前的GUI线程，如果有其他线程在运行是不会关闭的，
#     #os.exit(App.exec_()) #实现关闭界面即退出系统。

```

  • 写回答

3条回答 默认 最新

  • GISer Liu 2024-04-10 22:59
    关注

    该回答引用自GPT-3.5,由博主GISer Liu编写：

    问题分析：

    1. 问题描述中提到，在PYQT中使用RadioButton点击创建线程后卡住。
    2. 给出的代码中，有两个自定义的线程类：RefreshSerialPortsThread和SerialThread。
    3. 主界面类COM_MainWindow中包含了串口的相关操作，包括串口的打开、关闭等。
    4. 代码中存在一些问题，比如串口的打开逻辑尚未完全实现，部分按钮的点击事件还未连接对应的槽函数。
      解决方案：
    5. 首先，应该完善串口的打开逻辑，确保串口能够正确打开并接收数据。这需要在open_serial方法中添加相应的代码。
    6. 其次，需要将RadioButton的点击事件连接到相应的槽函数，以便在点击时创建和启动线程。
    7. 在线程类中，需要确保适当的退出条件，避免线程陷入无限循环而导致卡住的情况发生。
    8. 需要在COM_MainWindow类中实现其他按钮的点击事件对应的槽函数，以完成相关功能。
      下面是代码修改的建议：
      pythonCopy code
      class COM_MainWindow(QMainWindow, Ui_MainWindow):
def __init__(self):
super(COM_MainWindow, self).__init__()
Ui_MainWindow.setupUi(self, self)
self.serial_open = False
self.serial_port = None
self.serial_thread = None
self.timer = QTimer()
self.baud_rate = 115200
self.data_bits = 8
self.stop_bits = 1
self.timestamps = []
self.data = []
# 连接RadioButton的点击事件到toggle_serial槽函数
self.radioButton.clicked.connect(self.toggle_serial)
# 实现串口的不停检测
self.refresh_thread = RefreshSerialPortsThread()
self.refresh_thread.ports_refreshed.connect(self.update_serial_ports)
self.refresh_thread.start()
def toggle_serial(self):
if self.serial_open:
self.close_serial()
else:
self.open_serial()
def open_serial(self):
port_name = self.comboBox.currentText()
self.baud_rate = int(self.baud_rate_box.currentText())
data_bits_text = self.data_bit_box.currentText()
self.data_bits = serial.EIGHTBITS if data_bits_text == "8" else serial.SEVENBITS
stop_bits_text = self.stop_bit_box.currentText()
self.stop_bits = serial.STOPBITS_ONE if stop_bits_text == "1" else \
serial.STOPBITS_ONE_POINT_FIVE if stop_bits_text == "1.5" else \
serial.STOPBITS_TWO
try:
self.serial_port = serial.Serial(port=port_name, baudrate=self.baud_rate, timeout=0.1)
self.serial_port.bytesize = self.data_bits
self.serial_port.stopbits = self.stop_bits
self.serial_open = True
# 创建并启动串口线程
self.serial_thread = SerialThread(self.serial_port)
self.serial_thread.data_received.connect(self.handle_received_data)
self.serial_thread.start()
print("Serial port opened successfully.")
except Exception as e:
print(f"Failed to open serial port: {e}")
def close_serial(self):
if self.serial_thread:
self.serial_thread.stop()
self.serial_thread.wait()
self.serial_thread = None
if self.serial_port and self.serial_port.isOpen():
self.serial_port.close()
self.serial_open = False
print("Serial port closed.")
def handle_received_data(self, data):
# 处理接收到的数据
print("Received:", data)
# 其他按钮点击事件对应的槽函数可以继续在这里实现
      在这个修改的代码中，我完善了串口的打开逻辑，并在toggle_serial方法中根据串口的打开状态来切换串口的打开和关闭。同时，我将串口线程的创建和启动放在了open_serial方法中，并在关闭串口时停止和等待线程结束。

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