如何在运行方法（线程）中传递数据（python，Pyqt）

Question

我想在 window 中使用 PyQt(Python) 创建线程。例如

class window(QtGui.QWidget):
    def __init__(self, parent = None):
        QtGui.QWidget.__init__(self, parent)

        self.setGeometry(100, 100, 500, 200)
        self.setWindowTitle('Hello')
        self.label = QtGui.QLabel(u'WoRLd', self)
        self.Layout = QtGui.QVBoxLayout()
        self.Layout.addWidget(self.label)
        self.setLayout(self.Layout)
        self.introduced = 123


        self.request = Requests()
        self.request.start()

        self.connect(self.request, QtCore.SIGNAL("mysignal(QString)"),
            self.on_change, QtCore.Qt.QueuedConnection)

    def on_change(self, s):
        self.label.setText(s)

class Requests():
    def __init__(self, parent=None):
        QtCore.QThread.__init__(self, parent)

    def run(self):
        self.emit(QtCore.SIGNAL("mysignal(QString)"), "143242" )


app = QtGui.QApplication(sys.argv)
main = window()
main.show()
sys.exit(app.exec_())

但是，在方法 "run" 中，我需要一些来自 "class window" 的日期（变量：已引入）。如何将此变量传递给 "def run"?

Answer 1

你只需要为它创建参数并将它传递给 class 实例。然后将它分配给 self.date，这使得它可以跨 class 实例访问：

class window(QtGui.QWidget):
    def __init__(self, parent = None):
        QtGui.QWidget.__init__(self, parent)

        self.setGeometry(100, 100, 500, 200)
        self.setWindowTitle('Hello')
        self.label = QtGui.QLabel(u'WoRLd', self)
        self.Layout = QtGui.QVBoxLayout()
        self.Layout.addWidget(self.label)
        self.setLayout(self.Layout)
        self.introduced = 123
        date = # get some date whatever you need to pass here

        self.request = Requests(date)
        self.request.start()

        self.connect(self.request, QtCore.SIGNAL("mysignal(QString)"),
            self.on_change, QtCore.Qt.QueuedConnection)

    def on_change(self, s):
        self.label.setText(s)

class Requests():
    def __init__(self, date, parent=None):
        self.date = date
        QtCore.QThread.__init__(self, parent)

    def run(self):
        # do something with self.date here
        self.emit(QtCore.SIGNAL("mysignal(QString)"), "143242" )


app = QtGui.QApplication(sys.argv)
main = window()
main.show()
sys.exit(app.exec_())

如何在运行方法（线程）中传递数据（python，Pyqt）

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如何在运行方法（线程）中传递数据（python，Pyqt）