python之无法关闭 GUI 应用程序

from PyQt5 import QtCore, QtGui, QtWidgets 
 
class Ui_MainWindow(object): 
 
    def setupUi(self, MainWindow): 
        MainWindow.setObjectName("MainWindow") 
        MainWindow.resize(277, 244) 
        self.centralwidget = QtWidgets.QWidget(MainWindow) 
        self.centralwidget.setObjectName("centralwidget") 
        MainWindow.setCentralWidget(self.centralwidget) 
        self.menubar = QtWidgets.QMenuBar(MainWindow) 
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22)) 
        self.menubar.setObjectName("menubar") 
        self.menuFile = QtWidgets.QMenu(self.menubar) 
        self.menuFile.setObjectName("menuFile") 
        MainWindow.setMenuBar(self.menubar) 
        self.actionQuit = QtWidgets.QAction(MainWindow) 
        self.actionQuit.setObjectName("actionQuit") 
        self.actionQuit.setShortcut("Ctrl+Q") 
        self.actionQuit.setStatusTip("Quit the application") 
        self.actionQuit.triggered.connect(MainWindow.closeEvent) 
        self.menuFile.addAction(self.actionQuit) 
        self.menubar.addAction(self.menuFile.menuAction()) 
        self.retranslateUi(MainWindow) 
        QtCore.QMetaObject.connectSlotsByName(MainWindow) 
        MainWindow.show() 
 
    def retranslateUi(self, MainWindow): 
        _translate = QtCore.QCoreApplication.translate 
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow")) 
        self.menuFile.setTitle(_translate("MainWindow", "File")) 
        self.actionQuit.setText(_translate("MainWindow", "Quit")) 
 
class MyWindow(QtWidgets.QMainWindow): 
 
    def closeEvent(self, event): 
        print(event) 
        result = QtWidgets.QMessageBox.question(self, 
                      "Confirm Exit...", 
                      "Are you sure you want to exit ?", 
                      QtWidgets.QMessageBox.Yes| QtWidgets.QMessageBox.No) 
        event.ignore() 
        print(result) 
        if result == QtWidgets.QMessageBox.Yes: 
            event.accept() 
 
if __name__ == "__main__": 
    import sys 
    app = QtWidgets.QApplication(sys.argv) 
    MainWindow = MyWindow() 
    ui = Ui_MainWindow() 
    ui.setupUi(MainWindow) 
    sys.exit(app.exec_()) 

当我尝试使用 Ctrl+Q 快捷键关闭应用程序时，会弹出消息框提示问题，当我单击其中一个选项时，我得到了

AttributeError: 'bool' object has no attribute 'ignore' 

我哪里错了？

请您参考如下方法:

您不应该直接调用 closeEvent() 方法(或 xxxEvent 的方法)，因为它是由 Qt 的内部元素通过事件循环调用的，而是您应该使用 close() 方法间接调用 closeEvent():

from PyQt5 import QtCore, QtGui, QtWidgets 
 
class Ui_MainWindow(object): 
 
    def setupUi(self, MainWindow): 
        MainWindow.setObjectName("MainWindow") 
        MainWindow.resize(277, 244) 
        self.centralwidget = QtWidgets.QWidget(MainWindow) 
        self.centralwidget.setObjectName("centralwidget") 
        MainWindow.setCentralWidget(self.centralwidget) 
        self.menubar = QtWidgets.QMenuBar(MainWindow) 
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 22)) 
        self.menubar.setObjectName("menubar") 
        self.menuFile = QtWidgets.QMenu(self.menubar) 
        self.menuFile.setObjectName("menuFile") 
        MainWindow.setMenuBar(self.menubar) 
        self.actionQuit = QtWidgets.QAction(MainWindow) 
        self.actionQuit.setObjectName("actionQuit") 
        self.actionQuit.setShortcut("Ctrl+Q") 
        self.actionQuit.setStatusTip("Quit the application") 
        self.menuFile.addAction(self.actionQuit) 
        self.menubar.addAction(self.menuFile.menuAction()) 
        self.retranslateUi(MainWindow) 
        QtCore.QMetaObject.connectSlotsByName(MainWindow) 
 
    def retranslateUi(self, MainWindow): 
        _translate = QtCore.QCoreApplication.translate 
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow")) 
        self.menuFile.setTitle(_translate("MainWindow", "File")) 
        self.actionQuit.setText(_translate("MainWindow", "Quit")) 
 
class MyWindow(QtWidgets.QMainWindow, Ui_MainWindow): 
    def __init__(self, parent=None): 
        super(MyWindow, self).__init__(parent) 
        self.setupUi(self) 
        self.actionQuit.triggered.connect(self.close) 
 
    def closeEvent(self, event): 
        print(event) 
        result = QtWidgets.QMessageBox.question(self, 
                      "Confirm Exit...", 
                      "Are you sure you want to exit ?", 
                      QtWidgets.QMessageBox.Yes| QtWidgets.QMessageBox.No) 
        event.ignore() 
        print(result) 
        if result == QtWidgets.QMessageBox.Yes: 
            event.accept() 
 
if __name__ == "__main__": 
    import sys 
    app = QtWidgets.QApplication(sys.argv) 
    w = MyWindow() 
    w.show() 
    sys.exit(app.exec_())