案例:设计一个用户登录界面

工具:python PyQt5

程序运行结果如下:

(1)初始界面

f592a7181caf457075ec8e6c27c2852c.png

(2)输入“用户名”和“密码”,点击“登录”

b7b2e7481fbb65303d9161af47252f50.png

(3)切换“管理员”和“普通用户”登录

c7d1fdda2db07172ec9b04810c9c9d8d.png

53454358541f7ff37daf5202548b40b3.png

(4)点击“退出”按钮后界面退出

设计程序如下:

# -*- 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

# 使用information()方法弹出信息提示框

QMessageBox.information(MainWindow, “登录信息”, “用户名: ” + self.lineEdit.text() +

” 密码:” + self.lineEdit_2.text(), QMessageBox.Ok)

# 自定义槽函数,用来判断用户登录身份

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_())


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原文链接:https://blog.csdn.net/weixin_39934869/article/details/113498874