PyQt5-自动化串行模块

PyQt5-自动化串行模块

Qt中的一个基本规则是，不应从主线程以外的线程更新GUI，这被称为GUI线程。有几种选择，例如通过信号将数据发送到主线程，或使用

QRunnable

with

QThreadPool

，如下所示：

码：

qtCreatorFile = "gui.ui" Ui_MainWindow, QtbaseClass = uic.loadUiType(qtCreatorFile)estudiantes = ['   ','    ','     ','    ']class SerialRunnable(QtCore.QRunnable):    def __init__(self, w):        QtCore.QRunnable.__init__(self)        self.w = w        self.ser = serial.Serial('COM9', baudrate=9600, timeout=1)    def run(self):        while True: dato = self.ser.readline().depre('ascii') if dato != "":     QtCore.QmetaObject.invokeMethod(self.w, "setValues",    QtCore.Qt.QueuedConnection,    QtCore.Q_ARG(str, dato)) QtCore.QThread.msleep(10)class MyApp(QtWidgets.QMainWindow, Ui_MainWindow):    def __init__(self):        QtWidgets.QMainWindow.__init__(self)        self.setupUi(self)        runnable = SerialRunnable(self)        QtCore.QThreadPool.globalInstance().start(runnable)    @QtCore.pyqtSlot(str)    def setValues(self, dato):        estudiantes.insert(0,dato)        estudiantes.pop()        self.Box1.setText(estudiantes[0])        self.Box2.setText(estudiantes[1])        self.Box3.setText(estudiantes[2])        self.Box4.setText(estudiantes[3])