PyQT4を使って別のQtウィンドウからQtウィンドウを開く方法は？

Question

登録機能を持つログインプログラムを作成する必要がありますが、メインウィンドウから登録ウィンドウを開くことはできません。私の目標は、メインウィンドウのコードからレジスタ関数を取得してレジスタウィンドウを開いて、使用できるようにすることです。

私には理由が分かりません。私は答えのためにこの場所の深さを洗ったが、うーん、私は運がない。

メインウィンドウ

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

# Form implementation generated from reading ui file 'mainwindow.ui' 
# 
# Created by: PyQt4 UI code generator 4.11.4 
# 
# WARNING! All changes made in this file will be lost! 

from PyQt4 import QtCore, QtGui 
from BlankSignup import SignUp 

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 Login(object): 
    def __init__(QtGui): 
     usernames = ['a'] 
    def setupUi(self, MainWindow): 
     MainWindow.setObjectName(_fromUtf8("MainWindow")) 
     MainWindow.setEnabled(True) 
     MainWindow.resize(243, 252) 
     palette = QtGui.QPalette() 
     brush = QtGui.QBrush(QtGui.QColor(255, 255, 255)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Window, brush) 
     brush = QtGui.QBrush(QtGui.QColor(255, 255, 255)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Window, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Window, brush) 
     MainWindow.setPalette(palette) 
     MainWindow.setTabShape(QtGui.QTabWidget.Triangular) 
     self.centralwidget = QtGui.QWidget(MainWindow) 
     self.centralwidget.setObjectName(_fromUtf8("centralwidget")) 
     self.gridLayoutWidget = QtGui.QWidget(self.centralwidget) 
     self.gridLayoutWidget.setGeometry(QtCore.QRect(10, 10, 223, 189)) 
     self.gridLayoutWidget.setObjectName(_fromUtf8("gridLayoutWidget")) 
     self.gridLayout = QtGui.QGridLayout(self.gridLayoutWidget) 
     self.gridLayout.setObjectName(_fromUtf8("gridLayout")) 
     self.horizontalLayout = QtGui.QHBoxLayout() 
     self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout")) 
     self.login_button = QtGui.QPushButton(self.gridLayoutWidget) 
     palette = QtGui.QPalette() 
     brush = QtGui.QBrush(QtGui.QColor(255, 255, 255)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Window, brush) 
     brush = QtGui.QBrush(QtGui.QColor(255, 255, 255)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Window, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Window, brush) 
     self.login_button.setPalette(palette) 
     self.login_button.setObjectName(_fromUtf8("login_button")) 
     self.horizontalLayout.addWidget(self.login_button) 
     self.register_button = QtGui.QPushButton(self.gridLayoutWidget) 
     self.register_button.setDefault(False) 
     self.register_button.setObjectName(_fromUtf8("register_button")) 
     self.horizontalLayout.addWidget(self.register_button) 
     self.gridLayout.addLayout(self.horizontalLayout, 4, 0, 1, 2) 
     self.signin_password_label = QtGui.QLabel(self.gridLayoutWidget) 
     self.signin_password_label.setObjectName(_fromUtf8("signin_password_label")) 
     self.gridLayout.addWidget(self.signin_password_label, 3, 0, 1, 1) 
     self.signin_password = QtGui.QLineEdit(self.gridLayoutWidget) 
     self.signin_password.setObjectName(_fromUtf8("signin_password")) 
     self.gridLayout.addWidget(self.signin_password, 3, 1, 1, 1) 
     self.signin_username = QtGui.QLineEdit(self.gridLayoutWidget) 
     self.signin_username.setObjectName(_fromUtf8("signin_username")) 
     self.gridLayout.addWidget(self.signin_username, 2, 1, 1, 1) 
     self.singin_username_label = QtGui.QLabel(self.gridLayoutWidget) 
     self.singin_username_label.setObjectName(_fromUtf8("singin_username_label")) 
     self.gridLayout.addWidget(self.singin_username_label, 2, 0, 1, 1) 
     self.signin_title = QtGui.QLabel(self.gridLayoutWidget) 
     font = QtGui.QFont() 
     font.setFamily(_fromUtf8("Small Fonts")) 
     font.setPointSize(72) 
     self.signin_title.setFont(font) 
     self.signin_title.setObjectName(_fromUtf8("signin_title")) 
     self.gridLayout.addWidget(self.signin_title, 1, 0, 1, 2) 
     MainWindow.setCentralWidget(self.centralwidget) 
     self.menubar = QtGui.QMenuBar(MainWindow) 
     self.menubar.setGeometry(QtCore.QRect(0, 0, 243, 21)) 
     self.menubar.setObjectName(_fromUtf8("menubar")) 
     MainWindow.setMenuBar(self.menubar) 
     self.statusbar = QtGui.QStatusBar(MainWindow) 
     self.statusbar.setObjectName(_fromUtf8("statusbar")) 
     MainWindow.setStatusBar(self.statusbar) 


     self.register_button.clicked.connect(self.register) 
     self.retranslateUi(MainWindow) 
     QtCore.QMetaObject.connectSlotsByName(MainWindow) 

    def retranslateUi(self, MainWindow): 
     MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None)) 
     self.login_button.setText(_translate("MainWindow", "Login", None)) 
     self.register_button.setText(_translate("MainWindow", "Register", None)) 
     self.signin_password_label.setText(_translate("MainWindow", "<html><head/><body><p><span style=\" font-size:10pt; color:#ffffff;\">password:</span></p></body></html>", None)) 
     self.singin_username_label.setText(_translate("MainWindow", "<html><head/><body><p><span style=\" font-size:10pt; color:#ffffff;\">username:</span></p></body></html>", None)) 
     self.signin_title.setText(_translate("MainWindow", "<html><head/><body><p align=\"center\"><span style=\" color:#ffffff;\">Blank</span></p></body></html>", None)) 
    def register(self): 
     pass 
    def login(self): 
     pass 
if __name__ == "__main__": 
    import sys 
    app = QtGui.QApplication(sys.argv) 
    MainWindow = QtGui.QMainWindow() 
    ui = Login() 
    ui.setupUi(MainWindow) 
    MainWindow.show() 
    sys.exit(app.exec_()) 

レジスタウィンドウ

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

# Form implementation generated from reading ui file 'signupwindowS.ui' 
# 
# Created by: PyQt4 UI code generator 4.11.4 
# 
# WARNING! All changes made in this file will be lost! 

from PyQt4 import QtCore, QtGui 

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 SignUp(object): 
    def setupUi(self, MainWindow): 
     MainWindow.setObjectName(_fromUtf8("MainWindow")) 
     MainWindow.resize(243, 250) 
     palette = QtGui.QPalette() 
     brush = QtGui.QBrush(QtGui.QColor(255, 255, 255)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Window, brush) 
     brush = QtGui.QBrush(QtGui.QColor(255, 255, 255)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Window, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Window, brush) 
     MainWindow.setPalette(palette) 
     MainWindow.setCursor(QtGui.QCursor(QtCore.Qt.ArrowCursor)) 
     MainWindow.setToolButtonStyle(QtCore.Qt.ToolButtonIconOnly) 
     self.centralwidget = QtGui.QWidget(MainWindow) 
     self.centralwidget.setObjectName(_fromUtf8("centralwidget")) 
     self.gridLayoutWidget = QtGui.QWidget(self.centralwidget) 
     self.gridLayoutWidget.setGeometry(QtCore.QRect(10, 10, 222, 191)) 
     self.gridLayoutWidget.setObjectName(_fromUtf8("gridLayoutWidget")) 
     self.gridLayout = QtGui.QGridLayout(self.gridLayoutWidget) 
     self.gridLayout.setObjectName(_fromUtf8("gridLayout")) 
     self.signup_username = QtGui.QLineEdit(self.gridLayoutWidget) 
     self.signup_username.setObjectName(_fromUtf8("signup_username")) 
     self.gridLayout.addWidget(self.signup_username, 2, 1, 1, 1) 
     self.signup_password_label = QtGui.QLabel(self.gridLayoutWidget) 
     self.signup_password_label.setObjectName(_fromUtf8("signup_password_label")) 
     self.gridLayout.addWidget(self.signup_password_label, 3, 0, 1, 1) 
     self.signup_password = QtGui.QLineEdit(self.gridLayoutWidget) 
     self.signup_password.setObjectName(_fromUtf8("signup_password")) 
     self.gridLayout.addWidget(self.signup_password, 3, 1, 1, 1) 
     self.signup_confirmpassword = QtGui.QLineEdit(self.gridLayoutWidget) 
     self.signup_confirmpassword.setObjectName(_fromUtf8("signup_confirmpassword")) 
     self.gridLayout.addWidget(self.signup_confirmpassword, 4, 1, 1, 1) 
     self.signup_confirmpassword_label = QtGui.QLabel(self.gridLayoutWidget) 
     self.signup_confirmpassword_label.setTextFormat(QtCore.Qt.AutoText) 
     self.signup_confirmpassword_label.setObjectName(_fromUtf8("signup_confirmpassword_label")) 
     self.gridLayout.addWidget(self.signup_confirmpassword_label, 4, 0, 1, 1) 
     self.signup_username_label = QtGui.QLabel(self.gridLayoutWidget) 
     self.signup_username_label.setObjectName(_fromUtf8("signup_username_label")) 
     self.gridLayout.addWidget(self.signup_username_label, 2, 0, 1, 1) 
     self.signup_title = QtGui.QLabel(self.gridLayoutWidget) 
     font = QtGui.QFont() 
     font.setFamily(_fromUtf8("Small Fonts")) 
     font.setPointSize(72) 
     self.signup_title.setFont(font) 
     self.signup_title.setObjectName(_fromUtf8("signup_title")) 
     self.gridLayout.addWidget(self.signup_title, 0, 0, 1, 2) 
     self.horizontalLayout = QtGui.QHBoxLayout() 
     self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout")) 
     self.submit_button = QtGui.QPushButton(self.gridLayoutWidget) 
     palette = QtGui.QPalette() 
     brush = QtGui.QBrush(QtGui.QColor(255, 255, 255)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Active, QtGui.QPalette.Window, brush) 
     brush = QtGui.QBrush(QtGui.QColor(255, 255, 255)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Inactive, QtGui.QPalette.Window, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Base, brush) 
     brush = QtGui.QBrush(QtGui.QColor(0, 0, 0)) 
     brush.setStyle(QtCore.Qt.SolidPattern) 
     palette.setBrush(QtGui.QPalette.Disabled, QtGui.QPalette.Window, brush) 
     self.submit_button.setPalette(palette) 
     self.submit_button.setObjectName(_fromUtf8("submit_button")) 
     self.horizontalLayout.addWidget(self.submit_button) 
     self.cancle_button = QtGui.QPushButton(self.gridLayoutWidget) 
     self.cancle_button.setDefault(False) 
     self.cancle_button.setObjectName(_fromUtf8("cancle_button")) 
     self.horizontalLayout.addWidget(self.cancle_button) 
     self.gridLayout.addLayout(self.horizontalLayout, 5, 0, 1, 2) 
     self.signup_subtitle = QtGui.QLabel(self.gridLayoutWidget) 
     self.signup_subtitle.setObjectName(_fromUtf8("signup_subtitle")) 
     self.gridLayout.addWidget(self.signup_subtitle, 1, 0, 1, 2) 
     MainWindow.setCentralWidget(self.centralwidget) 
     self.menubar = QtGui.QMenuBar(MainWindow) 
     self.menubar.setGeometry(QtCore.QRect(0, 0, 243, 21)) 
     self.menubar.setObjectName(_fromUtf8("menubar")) 
     MainWindow.setMenuBar(self.menubar) 
     self.statusbar = QtGui.QStatusBar(MainWindow) 
     self.statusbar.setObjectName(_fromUtf8("statusbar")) 
     MainWindow.setStatusBar(self.statusbar) 

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

    def retranslateUi(self, MainWindow): 
     MainWindow.setWindowTitle(_translate("MainWindow", "Blank", None)) 
     self.signup_password_label.setText(_translate("MainWindow", "<html><head/><body><p><span style=\" color:#ffffff;\">new password</span></p></body></html>", None)) 
     self.signup_confirmpassword_label.setText(_translate("MainWindow", "<html><head/><body><p><span style=\" color:#ffffff;\">confirm password</span></p></body></html>", None)) 
     self.signup_username_label.setText(_translate("MainWindow", "<html><head/><body><p><span style=\" color:#ffffff;\">new username</span></p></body></html>", None)) 
     self.signup_title.setText(_translate("MainWindow", "<html><head/><body><p align=\"center\"><span style=\" font-size:24pt; color:#ffffff;\">Blank sign up</span></p></body></html>", None)) 
     self.submit_button.setText(_translate("MainWindow", "Submit", None)) 
     self.cancle_button.setText(_translate("MainWindow", "Cancel", None)) 
     self.signup_subtitle.setText(_translate("MainWindow", "<html><head/><body><p align=\"center\"><span style=\" font-size:12pt; color:#ffffff;\">put in information below</span></p></body></html>", None)) 


if __name__ == "__main__": 
    import sys 
    app = QtGui.QApplication(sys.argv) 
    MainWindow = QtGui.QMainWindow() 
    ui = SignUp() 
    ui.setupUi(MainWindow) 
    MainWindow.show() 
    sys.exit(app.exec_()) 

Answer 1

def registerFunction(): 
    s = SignUp() 
    s.show() 
    return s 

EDIT：関数の最初の行で

我々は呼んで、あなたのSignUpフォーム のインスタンスを作成しましたそのメンバースロット機能0123フォームを表示するには、関数の最後に、SignUpフォームのインスタンスを返します。我々はその関数内で作成SignUpインスタンスが自動的に破棄されているため

registerFunction() 
//destroyed, out of scope 

これを防ぐために、スコープの外に出たとき、あなたは、このregisterFunction（）あなたはSignUpウィンドウがすぐに閉じていることがわかりますを呼び出す今

この関数を参照するクラスから変数を保持する必要があります。

（我々はそれholderに名前を言うことができます） 今、私たちがやる：あなたはとてもあなたがあることを編集しようとした場合

holder = registerFunction()