使用 PyQT5 在 QLCDNumber 上显示传感器输出
Display Sensor Output on QLCDNumber using PyQT5
所以我开发了一个代码，可以检测传感器的电压，然后输出一个平均电压，我的问题是如何让这个值随着我的传感器值的变化而更新，目前它正在打印初始值值然后不更新，我使用 QTDesigner 创建了一个主窗口，我正在使用 Python3 和 PyQt5 库来编写代码。
这可能吗？如果是怎么办？
这是我的代码：
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtGui import QPixmap
import RPi.GPIO as GPIO
import Test_rc
import time
import board
import busio
from adafruit_ads1x15.single_ended import ADS1115
i2c = busio.I2C(board.SCL,board.SDA)
adc = ADS1115(i2c)
GAIN = 2/3
c1 = 525.4
c2=28152
GPIO.setmode(GPIO.BCM)
Relay_1 = 27
Transducer = 17
GPIO.setup(Transducer,GPIO.IN)
GPIO.setup(Relay_1, GPIO.OUT)
GPIO.output(Relay_1, GPIO.HIGH)
GPIO.output(Relay_1, GPIO.LOW)
def Pressure_Reading():
while True:
time.sleep(0.02)
r0 = adc.read_volts(0,gain = GAIN, data_rate=None)
r1 = adc.read_adc(0, gain = GAIN, data_rate =None)
Pressure_Volts = r0*94.72436287
Pressure_adc = r1*(c1/c2)
time.sleep(0.02)
r01= adc.read_volts(0,gain = GAIN, data_rate=None)
r11= adc.read_adc(0, gain = GAIN, data_rate =None)
Pressure_Volts2 = r01*94.72436287
Pressure_adc2 = r11*(c1/c2)
time.sleep(0.02)
r02= adc.read_volts(0,gain = GAIN, data_rate=None)
r12= adc.read_adc(0, gain = GAIN, data_rate =None)
Pressure_Volts3 = r02*94.72436287
Pressure_adc3 = r12*(c1/c2)
time.sleep(0.02)
r03 = adc.read_volts(0,gain = GAIN, data_rate=None)
r13 = adc.read_adc(0, gain = GAIN, data_rate =None)
Pressure_Volts4 = r03*94.72436287
Pressure_adc4 = r13*(c1/c2)
time.sleep(0.02)
r04= adc.read_volts(0,gain = GAIN, data_rate=None)
r14= adc.read_adc(0, gain = GAIN, data_rate =None)
Pressure_Volts5 = r04*94.72436287
Pressure_adc5 = r14*(c1/c2)
Pressure_Volts_Avg = (Pressure_Volts+Pressure_Volts2+Pressure_Volts3+Pressure_Volts4+Pressure_Volts5)/5
Pressure_adc_Avg = (Pressure_adc+Pressure_adc2+Pressure_adc3+Pressure_adc4+Pressure_adc5)/5
Pressure_Avg = (Pressure_Volts_Avg+Pressure_adc_Avg)/2
return Pressure_Avg
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(788, 424)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.stackedWidget = QtWidgets.QStackedWidget(self.centralwidget)
self.stackedWidget.setGeometry(QtCore.QRect(10, 0, 761, 501))
self.stackedWidget.setObjectName("stackedWidget")
self.page_3 = QtWidgets.QWidget()
self.page_3.setObjectName("page_3")
self.label = QtWidgets.QLabel(self.page_3)
self.label.setGeometry(QtCore.QRect(200, 0, 341, 61))
font = QtGui.QFont()
font.setFamily("Arial Black")
font.setPointSize(22)
font.setBold(True)
font.setWeight(75)
self.label.setFont(font)
self.label.setAlignment(QtCore.Qt.AlignCenter)
self.label.setObjectName("label")
self.pushButton_2 = QtWidgets.QPushButton(self.page_3)
self.pushButton_2.setGeometry(QtCore.QRect(220, 170, 141, 41))
self.pushButton_2.setObjectName("pushButton_2")
self.pushButton = QtWidgets.QPushButton(self.page_3)
self.pushButton.setGeometry(QtCore.QRect(380, 170, 141, 41))
self.pushButton.setObjectName("pushButton")
self.label_2 = QtWidgets.QLabel(self.page_3)
self.label_2.setGeometry(QtCore.QRect(120, 260, 541, 141))
self.label_2.setObjectName("label_2")
self.groupBox_2 = QtWidgets.QGroupBox(self.page_3)
self.groupBox_2.setGeometry(QtCore.QRect(90, 40, 101, 221))
self.groupBox_2.setTitle("")
self.groupBox_2.setObjectName("groupBox_2")
self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.groupBox_2)
self.verticalLayout_2.setObjectName("verticalLayout_2")
self.label_7 = QtWidgets.QLabel(self.groupBox_2)
self.label_7.setObjectName("label_7")
self.verticalLayout_2.addWidget(self.label_7)
self.lcdNumber = QtWidgets.QLCDNumber(self.groupBox_2)
self.lcdNumber.setObjectName("lcdNumber")
self.verticalLayout_2.addWidget(self.lcdNumber)
self.lcdNumber.display(Pressure_Reading())
我已经输入了所有的代码，直到 lcdnumber 调用。
主窗口之后的其余代码 class，我让我的代码控制一个继电器和按钮导航几页，这部分代码运行良好
class ControlMainWindow(QtWidgets.QMainWindow):
def __init__(self,parent=None):
super(ControlMainWindow,self).__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.ui.SettingsButton.clicked.connect(lambda:self.ui.stackedWidget.setCurrentIndex(1))
self.ui.pushButton_5.clicked.connect(lambda:self.ui.stackedWidget.setCurrentIndex(0))
self.ui.pushButton.clicked.connect(self.OnSwitch)
self.ui.pushButton_2.clicked.connect(self.OffSwitch)
self.ui.DelayButton.clicked.connect(self.Delay_Switch)
def OnSwitch(self):
GPIO.output(Relay_1, GPIO.HIGH)
def OffSwitch(self):
GPIO.output(Relay_1, GPIO.LOW)
def Delay_Switch(self):
time.sleep(5)
GPIO.output(Relay_1,GPIO.HIGH)
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
mySW = ControlMainWindow()
mySW.show()
sys.exit(app.exec_())
对不起。我不熟悉您使用的某些模块。
一般来说，它可能看起来像这样：
main.py
import sys
from random import randint
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.QtCore import QTimer
from ui import Ui_MainWindow
class Form(QMainWindow):
def __init__(self):
super().__init__()
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.i = 0
self.voltageMin = 180
self.voltageMax = 180
self.ui.lcdNumberCur.display(self.i)
self.ui.pushButton.clicked.connect(self.startTimer)
self.timer = QTimer(self)
self.timer.setInterval(1000)
self.timer.timeout.connect(self.updateData)
self.show()
def startTimer(self):
if self.ui.pushButton.text() == "Start Timer":
self.timer.start(1000)
self.ui.pushButton.setText("Stop Timer")
else:
self.ui.pushButton.setText("Start Timer")
self.timer.stop()
def updateData(self):
voltage = randint(90, 260) # <--- insert your average voltage here
self.ui.lcdNumberCur.display(voltage)
if voltage > self.voltageMax:
self.voltageMax = voltage
self.ui.lcdNumberMax.display(self.voltageMax)
elif voltage < self.voltageMin:
self.voltageMin = voltage
self.ui.lcdNumberMin.display(self.voltageMin)
if __name__ == '__main__':
app = QApplication(sys.argv)
frm = Form()
sys.exit(app.exec_())
ui.py
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(500, 300)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.groupBox = QtWidgets.QGroupBox(self.centralwidget)
self.groupBox.setGeometry(QtCore.QRect(0, 0, 400, 200))
self.groupBox.setObjectName("groupBox")
self.lcdNumberMax = QtWidgets.QLCDNumber(self.groupBox)
self.lcdNumberMax.setGeometry(QtCore.QRect(225, 10, 151, 41))
self.lcdNumberMax.setObjectName("lcdNumberMax")
self.lcdNumberCur = QtWidgets.QLCDNumber(self.groupBox)
self.lcdNumberCur.setGeometry(QtCore.QRect(225, 55, 151, 41))
self.lcdNumberCur.setObjectName("lcdNumberCur")
self.lcdNumberMin = QtWidgets.QLCDNumber(self.groupBox)
self.lcdNumberMin.setGeometry(QtCore.QRect(225, 100, 151, 41))
self.lcdNumberMin.setObjectName("lcdNumberMin")
self.label = QtWidgets.QLabel(self.groupBox)
self.label.setGeometry(QtCore.QRect(20, 50, 150, 50))
self.label.setObjectName("label")
self.labelMax = QtWidgets.QLabel(self.groupBox)
self.labelMax.setGeometry(QtCore.QRect(20, 8, 150, 50))
self.labelMax.setObjectName("labelMax")
self.labelMin = QtWidgets.QLabel(self.groupBox)
self.labelMin.setGeometry(QtCore.QRect(20, 95, 150, 50))
self.labelMin.setObjectName("labelMin")
self.pushButton = QtWidgets.QPushButton("pushButton", self.groupBox) #(self.scrollAreaWidgetContents)
self.pushButton.setGeometry(QtCore.QRect(180, 165, 75, 23))
self.pushButton.setObjectName("pushButton")
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", "LCDNumber - Timer(Start-Stop)"))
self.groupBox.setTitle(_translate("MainWindow", "Data"))
self.label.setText(_translate("MainWindow", "Current voltage in the network"))
self.labelMin.setText(_translate("MainWindow", "Min voltage in the network"))
self.labelMax.setText(_translate("MainWindow", "Max voltage in the network"))
self.pushButton.setText(_translate("MainWindow", "Start Timer"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
好吧，因为陷入所有 gui 的东西，我不得不实现线程并从 gui 线程中删除函数。因为问题是关于传感器的输出，所以我删除了所有与之无关的代码，只包含了传感器所需的代码。我希望这是有道理的。
这解决了问题：
class Worker(QtCore.QThread):
valueFound = QtCore.pyqtSignal(int, name="valueFound")
GAIN = 2/3
c1 = 525.4
c2=28152
Relay_1 = 27
def __init__(self, parent=None):
super(Worker, self).__init__(parent)
self.runFlag = False
self.i2c = busio.I2C(board.SCL,board.SDA)
self.adc = ADS1115(self.i2c)
GPIO.setmode(GPIO.BCM)
GPIO.setup(self.Relay_1, GPIO.OUT)
GPIO.output(self.Relay_1, GPIO.HIGH)
GPIO.output(self.Relay_1, GPIO.LOW)
def startThread(self):
self.runFlag = True
self.start()
def stopThread(self):
self.runFlag = False
def run(self):
while self.runFlag:
self.valueFound.emit(self.Pressure_Reading())
......
def run(self):
while self.runFlag:
self.valueFound.emit(self.Pressure_Reading())
.......
self.worker = Worker(self)
self.worker.valueFound.connect(self.OnValueFound)
.......
self.worker.startThread()
def closeEvent(self, event):
self.worker.stopThread()
while self.worker.isRunning():
pass
event.accept()
def OnValueFound(self, value):
self.ui.lcdNumber.display(value)
添加这些允许程序不断更新 LCD 编号。
所以我开发了一个代码，可以检测传感器的电压，然后输出一个平均电压，我的问题是如何让这个值随着我的传感器值的变化而更新，目前它正在打印初始值值然后不更新，我使用 QTDesigner 创建了一个主窗口，我正在使用 Python3 和 PyQt5 库来编写代码。
这可能吗？如果是怎么办？
这是我的代码：
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtGui import QPixmap
import RPi.GPIO as GPIO
import Test_rc
import time
import board
import busio
from adafruit_ads1x15.single_ended import ADS1115
i2c = busio.I2C(board.SCL,board.SDA)
adc = ADS1115(i2c)
GAIN = 2/3
c1 = 525.4
c2=28152
GPIO.setmode(GPIO.BCM)
Relay_1 = 27
Transducer = 17
GPIO.setup(Transducer,GPIO.IN)
GPIO.setup(Relay_1, GPIO.OUT)
GPIO.output(Relay_1, GPIO.HIGH)
GPIO.output(Relay_1, GPIO.LOW)
def Pressure_Reading():
while True:
time.sleep(0.02)
r0 = adc.read_volts(0,gain = GAIN, data_rate=None)
r1 = adc.read_adc(0, gain = GAIN, data_rate =None)
Pressure_Volts = r0*94.72436287
Pressure_adc = r1*(c1/c2)
time.sleep(0.02)
r01= adc.read_volts(0,gain = GAIN, data_rate=None)
r11= adc.read_adc(0, gain = GAIN, data_rate =None)
Pressure_Volts2 = r01*94.72436287
Pressure_adc2 = r11*(c1/c2)
time.sleep(0.02)
r02= adc.read_volts(0,gain = GAIN, data_rate=None)
r12= adc.read_adc(0, gain = GAIN, data_rate =None)
Pressure_Volts3 = r02*94.72436287
Pressure_adc3 = r12*(c1/c2)
time.sleep(0.02)
r03 = adc.read_volts(0,gain = GAIN, data_rate=None)
r13 = adc.read_adc(0, gain = GAIN, data_rate =None)
Pressure_Volts4 = r03*94.72436287
Pressure_adc4 = r13*(c1/c2)
time.sleep(0.02)
r04= adc.read_volts(0,gain = GAIN, data_rate=None)
r14= adc.read_adc(0, gain = GAIN, data_rate =None)
Pressure_Volts5 = r04*94.72436287
Pressure_adc5 = r14*(c1/c2)
Pressure_Volts_Avg = (Pressure_Volts+Pressure_Volts2+Pressure_Volts3+Pressure_Volts4+Pressure_Volts5)/5
Pressure_adc_Avg = (Pressure_adc+Pressure_adc2+Pressure_adc3+Pressure_adc4+Pressure_adc5)/5
Pressure_Avg = (Pressure_Volts_Avg+Pressure_adc_Avg)/2
return Pressure_Avg
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(788, 424)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.stackedWidget = QtWidgets.QStackedWidget(self.centralwidget)
self.stackedWidget.setGeometry(QtCore.QRect(10, 0, 761, 501))
self.stackedWidget.setObjectName("stackedWidget")
self.page_3 = QtWidgets.QWidget()
self.page_3.setObjectName("page_3")
self.label = QtWidgets.QLabel(self.page_3)
self.label.setGeometry(QtCore.QRect(200, 0, 341, 61))
font = QtGui.QFont()
font.setFamily("Arial Black")
font.setPointSize(22)
font.setBold(True)
font.setWeight(75)
self.label.setFont(font)
self.label.setAlignment(QtCore.Qt.AlignCenter)
self.label.setObjectName("label")
self.pushButton_2 = QtWidgets.QPushButton(self.page_3)
self.pushButton_2.setGeometry(QtCore.QRect(220, 170, 141, 41))
self.pushButton_2.setObjectName("pushButton_2")
self.pushButton = QtWidgets.QPushButton(self.page_3)
self.pushButton.setGeometry(QtCore.QRect(380, 170, 141, 41))
self.pushButton.setObjectName("pushButton")
self.label_2 = QtWidgets.QLabel(self.page_3)
self.label_2.setGeometry(QtCore.QRect(120, 260, 541, 141))
self.label_2.setObjectName("label_2")
self.groupBox_2 = QtWidgets.QGroupBox(self.page_3)
self.groupBox_2.setGeometry(QtCore.QRect(90, 40, 101, 221))
self.groupBox_2.setTitle("")
self.groupBox_2.setObjectName("groupBox_2")
self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.groupBox_2)
self.verticalLayout_2.setObjectName("verticalLayout_2")
self.label_7 = QtWidgets.QLabel(self.groupBox_2)
self.label_7.setObjectName("label_7")
self.verticalLayout_2.addWidget(self.label_7)
self.lcdNumber = QtWidgets.QLCDNumber(self.groupBox_2)
self.lcdNumber.setObjectName("lcdNumber")
self.verticalLayout_2.addWidget(self.lcdNumber)
self.lcdNumber.display(Pressure_Reading())
我已经输入了所有的代码，直到 lcdnumber 调用。
主窗口之后的其余代码 class，我让我的代码控制一个继电器和按钮导航几页，这部分代码运行良好
class ControlMainWindow(QtWidgets.QMainWindow):
def __init__(self,parent=None):
super(ControlMainWindow,self).__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.ui.SettingsButton.clicked.connect(lambda:self.ui.stackedWidget.setCurrentIndex(1))
self.ui.pushButton_5.clicked.connect(lambda:self.ui.stackedWidget.setCurrentIndex(0))
self.ui.pushButton.clicked.connect(self.OnSwitch)
self.ui.pushButton_2.clicked.connect(self.OffSwitch)
self.ui.DelayButton.clicked.connect(self.Delay_Switch)
def OnSwitch(self):
GPIO.output(Relay_1, GPIO.HIGH)
def OffSwitch(self):
GPIO.output(Relay_1, GPIO.LOW)
def Delay_Switch(self):
time.sleep(5)
GPIO.output(Relay_1,GPIO.HIGH)
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
mySW = ControlMainWindow()
mySW.show()
sys.exit(app.exec_())
对不起。我不熟悉您使用的某些模块。 一般来说，它可能看起来像这样：
main.py
import sys
from random import randint
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.QtCore import QTimer
from ui import Ui_MainWindow
class Form(QMainWindow):
def __init__(self):
super().__init__()
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.i = 0
self.voltageMin = 180
self.voltageMax = 180
self.ui.lcdNumberCur.display(self.i)
self.ui.pushButton.clicked.connect(self.startTimer)
self.timer = QTimer(self)
self.timer.setInterval(1000)
self.timer.timeout.connect(self.updateData)
self.show()
def startTimer(self):
if self.ui.pushButton.text() == "Start Timer":
self.timer.start(1000)
self.ui.pushButton.setText("Stop Timer")
else:
self.ui.pushButton.setText("Start Timer")
self.timer.stop()
def updateData(self):
voltage = randint(90, 260) # <--- insert your average voltage here
self.ui.lcdNumberCur.display(voltage)
if voltage > self.voltageMax:
self.voltageMax = voltage
self.ui.lcdNumberMax.display(self.voltageMax)
elif voltage < self.voltageMin:
self.voltageMin = voltage
self.ui.lcdNumberMin.display(self.voltageMin)
if __name__ == '__main__':
app = QApplication(sys.argv)
frm = Form()
sys.exit(app.exec_())
ui.py
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(500, 300)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.groupBox = QtWidgets.QGroupBox(self.centralwidget)
self.groupBox.setGeometry(QtCore.QRect(0, 0, 400, 200))
self.groupBox.setObjectName("groupBox")
self.lcdNumberMax = QtWidgets.QLCDNumber(self.groupBox)
self.lcdNumberMax.setGeometry(QtCore.QRect(225, 10, 151, 41))
self.lcdNumberMax.setObjectName("lcdNumberMax")
self.lcdNumberCur = QtWidgets.QLCDNumber(self.groupBox)
self.lcdNumberCur.setGeometry(QtCore.QRect(225, 55, 151, 41))
self.lcdNumberCur.setObjectName("lcdNumberCur")
self.lcdNumberMin = QtWidgets.QLCDNumber(self.groupBox)
self.lcdNumberMin.setGeometry(QtCore.QRect(225, 100, 151, 41))
self.lcdNumberMin.setObjectName("lcdNumberMin")
self.label = QtWidgets.QLabel(self.groupBox)
self.label.setGeometry(QtCore.QRect(20, 50, 150, 50))
self.label.setObjectName("label")
self.labelMax = QtWidgets.QLabel(self.groupBox)
self.labelMax.setGeometry(QtCore.QRect(20, 8, 150, 50))
self.labelMax.setObjectName("labelMax")
self.labelMin = QtWidgets.QLabel(self.groupBox)
self.labelMin.setGeometry(QtCore.QRect(20, 95, 150, 50))
self.labelMin.setObjectName("labelMin")
self.pushButton = QtWidgets.QPushButton("pushButton", self.groupBox) #(self.scrollAreaWidgetContents)
self.pushButton.setGeometry(QtCore.QRect(180, 165, 75, 23))
self.pushButton.setObjectName("pushButton")
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", "LCDNumber - Timer(Start-Stop)"))
self.groupBox.setTitle(_translate("MainWindow", "Data"))
self.label.setText(_translate("MainWindow", "Current voltage in the network"))
self.labelMin.setText(_translate("MainWindow", "Min voltage in the network"))
self.labelMax.setText(_translate("MainWindow", "Max voltage in the network"))
self.pushButton.setText(_translate("MainWindow", "Start Timer"))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())
好吧，因为陷入所有 gui 的东西，我不得不实现线程并从 gui 线程中删除函数。因为问题是关于传感器的输出，所以我删除了所有与之无关的代码，只包含了传感器所需的代码。我希望这是有道理的。
这解决了问题：
class Worker(QtCore.QThread):
valueFound = QtCore.pyqtSignal(int, name="valueFound")
GAIN = 2/3
c1 = 525.4
c2=28152
Relay_1 = 27
def __init__(self, parent=None):
super(Worker, self).__init__(parent)
self.runFlag = False
self.i2c = busio.I2C(board.SCL,board.SDA)
self.adc = ADS1115(self.i2c)
GPIO.setmode(GPIO.BCM)
GPIO.setup(self.Relay_1, GPIO.OUT)
GPIO.output(self.Relay_1, GPIO.HIGH)
GPIO.output(self.Relay_1, GPIO.LOW)
def startThread(self):
self.runFlag = True
self.start()
def stopThread(self):
self.runFlag = False
def run(self):
while self.runFlag:
self.valueFound.emit(self.Pressure_Reading())
......
def run(self):
while self.runFlag:
self.valueFound.emit(self.Pressure_Reading())
.......
self.worker = Worker(self)
self.worker.valueFound.connect(self.OnValueFound)
.......
self.worker.startThread()
def closeEvent(self, event):
self.worker.stopThread()
while self.worker.isRunning():
pass
event.accept()
def OnValueFound(self, value):
self.ui.lcdNumber.display(value)
添加这些允许程序不断更新 LCD 编号。