PyQt5 - 如何將關閉鍵（紅色x）連接到函數

Question

我試圖將close key (red x)連接到函數（消息框）。我到目前爲止所嘗試的都不起作用;當我點擊close key (red x)時，我的代碼會凍結。沒有錯誤信息。

這裏是我的代碼：

from PyQt5 import QtCore, QtGui, QtWidgets 
from PyQt5.QtWidgets import QMainWindow, QMessageBox 
class Ui_MainWindow(QMainWindow): 
    def setupUi(self, MainWindow): 
     MainWindow.setObjectName("MainWindow") 
     MainWindow.setWindowModality(QtCore.Qt.NonModal) 
     MainWindow.resize(987, 746) 
     MainWindow.setMinimumSize(567, 456) 
     MainWindow.setMaximumSize(987, 746) 
     font = QtGui.QFont() 
     font.setPointSize(9) 
     MainWindow.setFont(font) 
     self.retranslateUi(MainWindow) 
     QtCore.QMetaObject.connectSlotsByName(MainWindow) 

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

    def Exit(self): 
     reply = QMessageBox.question(self, 'Quit', 'Are You Sure to Quit?', QMessageBox.No| QMessageBox.Yes) 

if __name__ == "__main__": 
    import sys 
    app = QtWidgets.QApplication(sys.argv) 
    app.aboutToQuit.connect(Ui_MainWindow.Exit) 
    MainWindow = QtWidgets.QMainWindow() 
    MainWindow.show() 
    Ui = Ui_MainWindow() 
    Ui.setupUi(MainWindow) 
    sys.exit(app.exec_()) 

感謝。

Answer 1

我不明白你爲什麼要創建一個類Ui_MainWindow但這裏是我會怎麼做你想要做的一個例子：

from PyQt5 import QtCore, QtGui, QtWidgets 
from PyQt5.QtWidgets import QMainWindow, QMessageBox 


class MainWindow(QMainWindow): 

    def __init__(self): 
     super().__init__() 
     self.setupUI() 

    def setupUI(self): 
     self.setObjectName("MainWindow") 
     self.setWindowModality(QtCore.Qt.NonModal) 
     self.resize(987, 746) 
     self.setMinimumSize(567, 456) 
     self.setMaximumSize(987, 746) 
     font = QtGui.QFont() 
     font.setPointSize(9) 
     self.setFont(font) 


    def closeEvent(self, event): 
     reply = QMessageBox.question(self, 'Quit', 'Are You Sure to Quit?', QMessageBox.No | QMessageBox.Yes) 
     if reply == QMessageBox.Yes: 
     event.accept() 
     else: 
     event.ignore() 


if __name__ == "__main__": 
    import sys 
    app = QtWidgets.QApplication(sys.argv) 
    mw = MainWindow() 
    mw.show() 
    sys.exit(app.exec_())