用户名和密码实施

Question

我有一个用 Python 编写的登录窗口，我希望用户在此表单中输入用户名和密码，以便打开主窗口。实现此功能的最佳方法是什么？

我不知道该怎么做。我正在使用 PyQt5。这是我的登录课程。我希望在登录表单中输入正确的用户名和密码后立即出现主类。我已经对此进行了尝试，但似乎无法使其正常工作。

登录类

    # Import Statements
from PyQt5 import QtCore, QtGui, QtWidgets
from MainGuiWindow import Ui_MainWindow

# Main Class that holds User Interface Objects
class Ui_loginWindow(object):

    # Function for Opening Main GUI window from login window by clicking login button
    def openMainWindow(self):
        self.window = QtWidgets.QMainWindow()
        self.ui = Ui_MainWindow()
        self.ui.setupUi(self.window)
        loginWindow.hide()
        self.window.show()

    def setupUi(self, loginWindow):
        loginWindow.setObjectName("loginWindow")
        loginWindow.setFixedSize(393, 183)
        self.centralwidget = QtWidgets.QWidget(loginWindow)
        self.centralwidget.setObjectName("centralwidget")

        # username label
        self.usernameLabel = QtWidgets.QLabel(self.centralwidget)
        self.usernameLabel.setGeometry(QtCore.QRect(10, 20, 84, 19))
        font = QtGui.QFont()
        font.setFamily("Arial")
        font.setPointSize(12)
        font.setBold(True)
        font.setWeight(75)
        self.usernameLabel.setFont(font)
        self.usernameLabel.setObjectName("usernameLabel")

        # password label
        self.passwordLabel = QtWidgets.QLabel(self.centralwidget)
        self.passwordLabel.setGeometry(QtCore.QRect(10, 70, 83, 19))
        font = QtGui.QFont()
        font.setFamily("Arial")
        font.setPointSize(12)
        font.setBold(True)
        font.setWeight(75)
        self.passwordLabel.setFont(font)
        self.passwordLabel.setObjectName("passwordLabel")

        # login button
        self.loginButton = QtWidgets.QPushButton(self.centralwidget)
        self.loginButton.setGeometry(QtCore.QRect(280, 110, 101, 27))
        font = QtGui.QFont()
        font.setFamily("Arial")
        font.setPointSize(12)
        font.setBold(True)
        font.setWeight(75)
        self.loginButton.setFont(font)
        self.loginButton.setObjectName("loginButton")

        # username TF
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setGeometry(QtCore.QRect(100, 20, 141, 20))
        self.lineEdit.setObjectName("usernameTF")

        # passwordTF
        self.lineEdit_2 = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit_2.setGeometry(QtCore.QRect(100, 70, 141, 20))
        self.lineEdit_2.setObjectName("passwordTF")
        loginWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(loginWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 393, 21))
        self.menubar.setObjectName("menubar")
        loginWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(loginWindow)
        self.statusbar.setObjectName("statusbar")
        loginWindow.setStatusBar(self.statusbar)

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

    # Function that sets the text on all the UI Buttons
    def retranslateUi(self, loginWindow):
        _translate = QtCore.QCoreApplication.translate
        loginWindow.setWindowTitle(_translate("loginWindow", "Android SQLite DB Parser Login"))
        self.usernameLabel.setText(_translate("loginWindow", "Username:"))
        self.passwordLabel.setText(_translate("loginWindow", "Password:"))
        self.loginButton.setText(_translate("loginWindow", "Login"))

    # login functionality to login to MainGUuiWindow
    username = "admin"
    password = "password"
    def doLogin(self):
            username = str(self.ui.lineEdit.text())
            password = str(self.ui.lineEdit2.text())
            if username == "admin" and password == "password":
                self.loginButton.clicked.connect(self.openMainWindow)
            else:
                QtGui.QMessageBox.warning(self,"Bad username or password", QtGui.QMessageBox.Ok)


    # Event Handling Code Section

        # Event Handling to open Main GUI Window
            self.loginButton.clicked.connect(self.openMainWindow)


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    loginWindow = QtWidgets.QMainWindow()
    ui = Ui_loginWindow()
    ui.setupUi(loginWindow)
    loginWindow.show()
    sys.exit(app.exec_())

Answer 1

我们无法为您编写完整的代码，但您可以这样做。尝试以这种方式实现。这可能不是最好的实现方式，但这会解决您的目的。

# main class import statement. 

class mainwindow()  
    def __init__():
    # do your main class activity.

if __name__ == "__main__": 
    app = QtGui.QApplication(sys.argv)
    loginObj = login.login()  # login class object import it into your main class code
    loginObj.setModal(True)  # Model window, use model window, "QDialog"
    if not loginObj.succ_login_flag:  # set this flag TRUE after success login attempt
        sys.exit(0)  # exit main class

    MainWindow = mainWindow()
    MainWindow.show()
    sys.exit(app.exec_())