正しいコードを入力してもbtnCancelの終了ボタンが機能しません。

Question

私のコードの問題は、ログインフォームインターフェイスを閉じることができないことです。PyQt4を初めて使用していて、「btnCancel」がクリックされたときに誰かがフォームを終了する機能を助けてくれたら好きでしょう。 。

これは私のコードです：

from PyQt4 import QtCore, QtGui 
import sys 
import os 

try: 
    _fromUtf8 = QtCore.QString.fromUtf8 
except AttributeError: 
    def _fromUtf8(s): 
     return s 

try: 
    _encoding = QtGui.QApplication.UnicodeUTF8 
    def _translate(context, text, disambig): 
     return QtGui.QApplication.translate(context, text, disambig, _encoding) 
except AttributeError: 
    def _translate(context, text, disambig): 
     return QtGui.QApplication.translate(context, text, disambig) 


class Ui_frmLogin(QtGui.QDialog): 
    def __init__(self): 
     QtGui.QDialog.__init__(self) 
     self.setupUi(self) 
     self.setWindowIcon(QtGui.QIcon('pythonlogo.png')) 

    def setupUi(self, frmLogin): 
     frmLogin.setObjectName(_fromUtf8("frmLogin")) 
     frmLogin.resize(394, 138) 
     frmLogin.setMinimumSize(QtCore.QSize(394, 0)) 
     frmLogin.setStyleSheet(_fromUtf8("QDialog{\n" 
"background-color: rgb(211, 223, 255);\n" 
"}")) 
     self.verticalLayout = QtGui.QVBoxLayout(frmLogin) 
     self.verticalLayout.setObjectName(_fromUtf8("verticalLayout")) 
     self.label = QtGui.QLabel(frmLogin) 
     font = QtGui.QFont() 
     font.setFamily(_fromUtf8("DINPro-Black")) 
     font.setPointSize(16) 
     self.label.setFont(font) 
     self.label.setAlignment(QtCore.Qt.AlignCenter) 
     self.label.setObjectName(_fromUtf8("label")) 
     self.verticalLayout.addWidget(self.label) 
     self.horizontalLayout_3 = QtGui.QHBoxLayout() 
     self.horizontalLayout_3.setObjectName(_fromUtf8("horizontalLayout_3")) 
     self.lblUsername = QtGui.QLabel(frmLogin) 
     font = QtGui.QFont() 
     font.setPointSize(10) 
     self.lblUsername.setFont(font) 
     self.lblUsername.setStyleSheet(_fromUtf8("QLabel {\n" 
" color: rgb(0, 0, 0)\n" 
"}")) 
     self.lblUsername.setAlignment(QtCore.Qt.AlignCenter) 
     self.lblUsername.setObjectName(_fromUtf8("lblUsername")) 
     self.horizontalLayout_3.addWidget(self.lblUsername) 
     self.leUsername = QtGui.QLineEdit(frmLogin) 
     self.leUsername.setObjectName(_fromUtf8("leUsername")) 
     self.horizontalLayout_3.addWidget(self.leUsername) 
     self.verticalLayout.addLayout(self.horizontalLayout_3) 
     self.horizontalLayout_4 = QtGui.QHBoxLayout() 
     self.horizontalLayout_4.setSpacing(4) 
     self.horizontalLayout_4.setObjectName(_fromUtf8("horizontalLayout_4")) 
     self.lblPassword = QtGui.QLabel(frmLogin) 
     font = QtGui.QFont() 
     font.setPointSize(10) 
     self.lblPassword.setFont(font) 
     self.lblPassword.setStyleSheet(_fromUtf8("QLabel {\n" 
" color: rgb(0, 0, 0)\n" 
"}")) 
     self.lblPassword.setAlignment(QtCore.Qt.AlignCenter) 
     self.lblPassword.setObjectName(_fromUtf8("lblPassword")) 
     self.horizontalLayout_4.addWidget(self.lblPassword) 
     self.lePassword = QtGui.QLineEdit(frmLogin) 
     self.lePassword.setObjectName(_fromUtf8("lePassword")) 
     self.horizontalLayout_4.addWidget(self.lePassword) 
     self.verticalLayout.addLayout(self.horizontalLayout_4) 
     self.horizontalLayout = QtGui.QHBoxLayout() 
     self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout")) 
     spacerItem = QtGui.QSpacerItem(40, 20, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum) 
     self.horizontalLayout.addItem(spacerItem) 
     self.btnLogin = QtGui.QPushButton(frmLogin) 
     self.btnLogin.setStyleSheet(_fromUtf8("QPushButton{\n" 
" background-color: rgb(221, 221, 221)\n" 
"}")) 
     self.btnLogin.setObjectName(_fromUtf8("btnLogin")) 
     self.horizontalLayout.addWidget(self.btnLogin) 
     self.btnSignUp = QtGui.QPushButton(frmLogin) 
     self.btnSignUp.setStyleSheet(_fromUtf8("QPushButton {\n" 
" background-color: rgb(221, 221, 221)\n" 
"}")) 
     self.btnSignUp.setObjectName(_fromUtf8("btnSignUp")) 
     self.horizontalLayout.addWidget(self.btnSignUp) 
     self.btnCancel = QtGui.QPushButton(frmLogin) 
     self.btnCancel.setStyleSheet(_fromUtf8("QPushButton {\n" 
" background-color: rgb(221, 221, 221)\n" 
"}")) 
     self.btnCancel.setObjectName(_fromUtf8("btnCancel")) 
     self.horizontalLayout.addWidget(self.btnCancel) 
     spacerItem1 = QtGui.QSpacerItem(40, 20, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum) 
     self.horizontalLayout.addItem(spacerItem1) 
     self.verticalLayout.addLayout(self.horizontalLayout) 
     spacerItem2 = QtGui.QSpacerItem(0, 0, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding) 
     self.verticalLayout.addItem(spacerItem2) 

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

    def retranslateUi(self, frmLogin): 
     frmLogin.setWindowTitle(_translate("frmLogin", "Login", None)) 
     self.label.setText(_translate("frmLogin", "LOGIN FORM", None)) 
     self.lblUsername.setText(_translate("frmLogin", "USERNAME", None)) 
     self.lblPassword.setText(_translate("frmLogin", "PASSWORD", None)) 
     self.btnLogin.setText(_translate("frmLogin", "Login", None)) 
     self.btnSignUp.setText(_translate("frmLogin", "Sign Up", None)) 
     self.btnCancel.setText(_translate("frmLogin", "Cancel", None)) 
     self.btnCancel.clicked.connect(QtCore.QCoreApplication.instance().quit) 



if __name__ == "__main__": 
    import sys 
    app = QtGui.QApplication(sys.argv)  
    frmLogin = QtGui.QDialog()    
    ui = Ui_frmLogin() 
    ui.setupUi(frmLogin) 
    frmLogin.show()       
    sys.exit(app.exec_()) 

Answer 1

[キャンセル]ボタンの目的は、フォーム近い場合は、あなたが変更することができます。

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

をして：

self.btnCancel.clicked.connect(self.ExitForm) 

def ExitForm(self): 
     sys.exit()