pyqt5 QMainWindow、Dialog点击关闭弹出是否确定关闭-Toy模板网

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1 功能

1.在QMainWindow()中，重写closeEvent函数实现窗口关闭事件。
2.在Dialog()中，重写closeEvent函数实现窗口关闭事件。
以上述两种情况做演示，其他情况同上。

2 效果展示

qmainwindow关闭事件,python,ui,qt5

3 QMainWindow()的代码演示

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'untitled.ui'
#
# Created by: PyQt5 UI code generator 5.15.4
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5 import QtCore, QtGui, QtWidgets


class QMainWindow(QtWidgets.QMainWindow):
    """对QDialog类重写，实现一些功能"""

    def closeEvent(self, event):
        """
        重写closeEvent方法，实现dialog窗体关闭时执行一些代码
        :param event: close()触发的事件
        :return: None
        """
        reply = QtWidgets.QMessageBox.question(self,
                                               '本程序',
                                               "是否要退出程序？",
                                               QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No,
                                               QtWidgets.QMessageBox.No)
        if reply == QtWidgets.QMessageBox.Yes:
            event.accept()
        else:
            event.ignore()


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(456, 234)
        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, 456, 23))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))


if __name__ == '__main__':
    app = QApplication(sys.argv)
    MainWindow = QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

注意：
在main()方法中可以看到：我们最终显示的是QMainWindow()类创建的窗口对象，如果想要实现关闭窗口触发弹窗提示或执行一些其他方法，需要重写的是QMainWindow()类中的closeEvent()方法，而不是重写我们创建的Ui_MainWindow()类的closeEvent()方法。

4.Dialog()的代码演示

上述是在QMainWindow()中重写窗口关闭的情况，这里展示在Dialog()中在重写closeEvent()的方法，文章来源地址https://www.toymoban.com/news/detail-606360.html

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file '3.ui'
#
# Created by: PyQt5 UI code generator 5.15.4
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.

import sys
from PyQt5.QtWidgets import QApplication
from PyQt5 import QtCore, QtWidgets


class Dialog(QtWidgets.QDialog):
    """对QDialog类重写，实现一些功能"""

    def closeEvent(self, event):
        """
        重写closeEvent方法，实现dialog窗体关闭时执行一些代码
        :param event: close()触发的事件
        :return: None
        """
        reply = QtWidgets.QMessageBox.question(self,
                                               '本程序',
                                               "是否要退出程序？",
                                               QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No,
                                               QtWidgets.QMessageBox.No)
        if reply == QtWidgets.QMessageBox.Yes:
            event.accept()
        else:
            event.ignore()


class Ui_Dialog(object):
    def setupUi(self, Dialog):
        Dialog.setObjectName("Dialog")
        Dialog.resize(390, 191)

        self.retranslateUi(Dialog)
        QtCore.QMetaObject.connectSlotsByName(Dialog)

    def retranslateUi(self, Dialog):
        _translate = QtCore.QCoreApplication.translate
        Dialog.setWindowTitle(_translate("Dialog", "Dialog"))


if __name__ == '__main__':
    app = QApplication(sys.argv)
    dialog = Dialog()
    ui = Ui_Dialog()
    ui.setupUi(dialog)
    dialog .show()
    sys.exit(app.exec_())