Case: Design a user login interface
Tools: python PyQt5
The program running results are as follows:
(1) Initial interface
(2) Enter "Username" and "Password", and click "Login"
(3) Switch "Administrator" and "Ordinary User" login
(4) The interface exits after clicking the "Exit" button
The design procedure is as follows:
# -*- coding: utf-8 -*-
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtGui import QPixmap, QIcon
from PyQt5.QtWidgets import QMessageBox
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(300, 180)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(60, 30, 51, 16))
self.label.setObjectName("label")
self.label_2 = QtWidgets.QLabel(self.centralwidget)
self.label_2.setGeometry(QtCore.QRect(60, 60, 51, 16))
self.label_2.setObjectName("label_2")
self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit.setGeometry(QtCore.QRect(120, 30, 113, 20))
self.lineEdit.setObjectName("lineEdit")
self.lineEdit_2 = QtWidgets.QLineEdit(self.centralwidget)
self.lineEdit_2.setGeometry(QtCore.QRect(120, 60, 113, 20))
self.lineEdit_2.setObjectName("lineEdit_2")
self.lineEdit_2.setEchoMode(QtWidgets.QLineEdit.Password) # 设置文本框为密码
self.lineEdit_2.setValidator(QtGui.QIntValidator(10000000,99999999)) # 设置只能输入8位数字
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(70, 120, 61, 27))
self.pushButton.setObjectName("pushButton")
self.pushButton.setIcon(QIcon(QPixmap("login.ico"))) # 为“登录”按钮设置图标
self.label = QtWidgets.QLabel(self.centralwidget)
self.label.setGeometry(QtCore.QRect(60, 30, 51, 16))
self.label.setObjectName("label")
self.label_2 = QtWidgets.QLabel(self.centralwidget)
self.label_2.setGeometry(QtCore.QRect(60, 60, 51, 16))
self.label_2.setObjectName("label_2")
self.radioButton = QtWidgets.QRadioButton(self.centralwidget)
self.radioButton.setGeometry(QtCore.QRect(70, 90, 71, 18))
self.radioButton.setObjectName("radioButton")
self.radioButton.setChecked(True) # 设置“管理员单选按钮默认选中
self.radioButton_2 = QtWidgets.QRadioButton(self.centralwidget)
self.radioButton_2.setGeometry(QtCore.QRect(150, 90, 81, 18))
self.radioButton_2.setObjectName("radioButton_2")
self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
self.pushButton_2.setGeometry(QtCore.QRect(160, 120, 61, 27))
self.pushButton_2.setObjectName("pushButton_2")
self.pushButton_2.setIcon(QIcon(QPixmap("exit.ico"))) # 为“退出”按钮设置图标
MainWindow.setCentralWidget(self.centralwidget)
self.retranslateUi(MainWindow)
self.pushButton.clicked.connect(self.login) # 为“登录”按钮的clicked信号绑定自定义槽函数
self.pushButton_2.clicked.connect(MainWindow.close) # 为“退出”按钮的clicked信号绑定MainWindow窗口自带的close(）槽函数
self.radioButton.toggled.connect(self.select) # 为单选按钮的toggled信号绑定自定义槽函数
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 317, 26))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def login(self):
from PyQt5.QtWidgets import QMessageBox
Use the information() method to pop up an information prompt box
QMessageBox.information(MainWindow, "登录信息", "用户名: " + self.lineEdit.text() +
" 密码:" + self.lineEdit_2.text(), QMessageBox.Ok)
Custom slot function, used to determine the user's login identity
def select(self):
if self.radioButton.isChecked(): # 判断是否为管理员登录
QMessageBox.information(MainWindow, "提示", "您选择的是 管理员 登录", QMessageBox.Ok)
elif self.radioButton_2.isChecked(): # 判断是否为普通用户登录
QMessageBox.information(MainWindow, "提示", "您选择的是 普通用户 登录", QMessageBox.Ok)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "系统登录"))
self.label.setText(_translate("MainWindow", "用户名："))
self.label_2.setText(_translate("MainWindow", "密 码："))
self.pushButton.setText(_translate("MainWindow", "登录"))
self.pushButton_2.setText(_translate("MainWindow", "退出"))
self.radioButton.setText(_translate("MainWindow", "管理员"))
self.radioButton_2.setText(_translate("MainWindow", "普通用户"))
import sys
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
MainWindow = QtWidgets.QMainWindow()
ui = Ui_MainWindow()
ui.setupUi(MainWindow)
MainWindow.show()
sys.exit(app.exec_())