Question

我开发了一个多线程gui，它在一个单独的线程中读取串行数据。我对线程，pyqt，python很新。我使用这个站点作为参考来实现这一点并且它正常工作但是研究如何添加第二个线程我发现了一些你不应该继承线程的文章和帖子。我如何将其转换为“正确”的方法？

class AThread(QtCore.QThread):
    updated = QtCore.pyqtSignal(str)
    query = QtCore.pyqtSignal(str)

    def __init__(self):
        QtCore.QThread.__init__(self)

    def run(self):
        try:
            while True:
                if ser.in_waiting:
                    line=ser.readline()[:-2]#remove end of line \r\n
                    self.updated.emit(line.decode('utf-8'))
                    if main_window.keywordCheckBox.isChecked():
                        if main_window.keywordInput.text() in line.decode('utf-8'):
                            self.query.emit("Match!")
                            self.query.emit(line.decode('utf-8'))
        except serial.serialutil.SerialException:
            pass

class MyMainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        self.thread= AThread()
        self.thread.updated.connect(self.updateText) 
        self.thread.query.connect(self.matchFound)

Answer 1

以下是Qt文档中您可能会发现有用的文章 http://doc.qt.io/qt-4.8/thread-basics.html

有一段名为＆＃34;您应该使用哪种Qt线程技术？＆＃34;根据你想要实现的目标，提供一个建议使用方法的表格

可能在您的情况下，您可能需要遵循表格最后两行中描述的方法之一。

如果是这种情况，那么您的代码应如下所示

class AWorker(QObject):
    #define your signals here
    def __init__(self):
       super(AWorker, self).__init__()

    def myfunction(self):
        #Your code from run function goes here.
        #Possibly instead of using True in your while loop you might 
        #better use a flag e.g while self.running:
        #so that when you want to exit the application you can
        #set the flag explicitly to false, and let the thread terminate 

class MainWindow(...)
    def __init__(...)
        ...
        self.worker = AWorker()
        self.thread = QThread()
        self.worker.moveToThread(self.thread)
        self.thread.started.connect(self.worker.myfunction)
        #Now you can connect the signals of AWorker class to any slots here
        #Also you might want to connect the finished signal of the thread
        # to some slot in order to perform something when the thread
        #finishes
        #e.g,
        self.thread.finished.connect(self.mythreadhasfinished)
        #Finally you need to start the thread
        self.thread.start()

正确使用Qthread子类化工作，更好的方法？

1 个答案: