Python GUI 종료가 작동하지 않습니다.

Question

Pyqt5 및 QT-Designer를 사용하여 GUI를 작성하는 방법을 배우고 있는데 취소 버튼 단추가 GUI 창을 닫아야합니다. 이 함수를 사용하여 종료하려면 QtCore.QCoreApplication.instance()하지만 작동하지 않습니다.

전체 코드 : 나와 함께

from PyQt5 import QtCore, QtGui, QtWidgets 
from PyQt5.QtGui import QIcon, QFont 
from PyQt5.QtWidgets import QToolTip 

class Ui_MainWindow(object): 
    def setupUi(self, MainWindow): 
     MainWindow.setObjectName("MainWindow") 
     MainWindow.resize(524, 201) 
     self.centralwidget = QtWidgets.QWidget(MainWindow) 
     self.centralwidget.setObjectName("centralwidget") 
     self.pushButton = QtWidgets.QPushButton(self.centralwidget) 
     self.pushButton.setGeometry(QtCore.QRect(320, 50, 151, 51)) 
     font = QtGui.QFont() 
     font.setFamily("Algerian") 
     font.setPointSize(12) 
     font.setBold(True) 
     font.setItalic(True) 
     font.setWeight(75) 
     self.pushButton.setFont(font) 
     self.pushButton.setMouseTracking(False) 
     self.pushButton.setAutoFillBackground(False) 
     self.pushButton.setObjectName("pushButton") 
     self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget) 
     self.pushButton_2.setGeometry(QtCore.QRect(30, 50, 161, 51)) 
     self.pushButton_2.setObjectName("pushButton_2") 
     MainWindow.setCentralWidget(self.centralwidget) 
     self.menubar = QtWidgets.QMenuBar(MainWindow) 
     self.menubar.setGeometry(QtCore.QRect(0, 0, 524, 31)) 
     self.menubar.setObjectName("menubar") 
     MainWindow.setMenuBar(self.menubar) 
     self.statusbar = QtWidgets.QStatusBar(MainWindow) 
     self.statusbar.setObjectName("statusbar") 
     MainWindow.setStatusBar(self.statusbar) 
     ##### 
     self.pushButton.setToolTip('this is just a <u> Button </u>') 
     self.pushButton.clicked.connect(self.press) 
     QToolTip.setFont(QFont('Times New Roman',14)) 
     MainWindow.setToolTip('my window!') 
     self.pushButton_2.clicked.connect(QtCore.QCoreApplication.instance().quit) 

     ### 

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

    def retranslateUi(self, MainWindow): 
     _translate = QtCore.QCoreApplication.translate 
     MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow")) 
     self.pushButton.setText(_translate("MainWindow", "Press Here")) 
     self.pushButton_2.setText(_translate("MainWindow", "Cancel!")) 

    def press(self): #1 
     print('Hallo World!') 

if __name__ == "__main__": 
    import sys 
    app = QtWidgets.QApplication(sys.argv) 
    MainWindow = QtWidgets.QMainWindow() 
    ui = Ui_MainWindow() 
    ui.setupUi(MainWindow) 
    MainWindow.setWindowTitle('Mein QT Windwow') 
    MainWindow.setWindowIcon(QIcon('MeinBild.png')) 
    MainWindow.show() 
    sys.exit(app.exec_()) 

Answer 1

귀하의 코드가 잘 작동, 대체하려고 :

self.pushButton_2.clicked.connect(QtCore.QCoreApplication.instance().quit) 

로 :

self.pushButton_2.clicked.connect(MainWindow.close) 

희망의 도움을, 닫는 것을 잊지 마라. 문제가 해결되면 주제.