簡體   English   中英

正確使用Qthread子類化作品,更好的方法?

[英]Proper use of Qthread subclassing works, better method?

我開發了一個多線程的gui,它可以在一個單獨的線程中讀取串行數據。 我對線程,pyqt和python非常陌生。 我使用此站點作為參考,以使它更深入地工作並能正常工作,但是研究如何添加第二個線程時,我發現了許多不應歸類於線程的文章和帖子。 我將如何將其轉換為“正確”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)

這是Qt文檔中的文章,可能會對您有所幫助http://doc.qt.io/qt-4.8/thread-basics.html

有一個名為“您應該使用哪種Qt線程技術?”的段落。 包含一個表格,該表格根據您要實現的目標建議使用哪種方法

在您的情況下,可能需要遵循表最后兩行中描述的方法之一。

如果是這種情況,那么您的代碼應如下所示

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()

暫無
暫無

聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.

 
粵ICP備18138465號  © 2020-2024 STACKOOM.COM