Python-如何制作一个简单的登陆界面【记录】-Toy模板网

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1、明确目的：

（1）打开登陆界面后，输入对应的账号和密码，自动进入到主界面程序，登陆界面消失；

（2）进入主界面程序后，可以返回登陆界面，同时主界面消失；

（3）达到指令要求后，可以注册账号和密码，并保存到数据库。（此功能具体实现暂时不考虑。）

2、首先，先创建一个登陆界面，可以通过Pyqt5创建，得到Ui_untitled.py界面程序文件【如下代码块】。

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

# Form implementation generated from reading ui file 'd:\Python_studyltem\软件登陆界面实现\login_file\untitled.ui'
#
# Created by: PyQt5 UI code generator 5.15.4
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_LoginActivity(object):
    def setupUi(self, LoginActivity):
        LoginActivity.setObjectName("LoginActivity")
        LoginActivity.resize(387, 178)
        self.centralwidget = QtWidgets.QWidget(LoginActivity)
        self.centralwidget.setObjectName("centralwidget")
        self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
        self.gridLayout.setObjectName("gridLayout")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setMinimumSize(QtCore.QSize(0, 30))
        self.pushButton.setObjectName("pushButton")
        self.gridLayout.addWidget(self.pushButton, 4, 1, 1, 1)
        self.lineEdit_2 = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit_2.setMinimumSize(QtCore.QSize(0, 30))
        self.lineEdit_2.setObjectName("lineEdit_2")
        self.gridLayout.addWidget(self.lineEdit_2, 1, 1, 1, 2)
        self.lineEdit = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit.setMinimumSize(QtCore.QSize(0, 30))
        self.lineEdit.setObjectName("lineEdit")
        self.gridLayout.addWidget(self.lineEdit, 0, 1, 1, 2)
        self.label_2 = QtWidgets.QLabel(self.centralwidget)
        self.label_2.setFrameShape(QtWidgets.QFrame.WinPanel)
        self.label_2.setFrameShadow(QtWidgets.QFrame.Raised)
        self.label_2.setObjectName("label_2")
        self.gridLayout.addWidget(self.label_2, 1, 0, 1, 1)
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setMinimumSize(QtCore.QSize(0, 0))
        self.label.setFrameShape(QtWidgets.QFrame.WinPanel)
        self.label.setFrameShadow(QtWidgets.QFrame.Raised)
        self.label.setObjectName("label")
        self.gridLayout.addWidget(self.label, 0, 0, 1, 1)
        self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_2.setMinimumSize(QtCore.QSize(0, 30))
        self.pushButton_2.setObjectName("pushButton_2")
        self.gridLayout.addWidget(self.pushButton_2, 4, 2, 1, 1)
        self.label_3 = QtWidgets.QLabel(self.centralwidget)
        self.label_3.setFrameShape(QtWidgets.QFrame.WinPanel)
        self.label_3.setFrameShadow(QtWidgets.QFrame.Raised)
        self.label_3.setObjectName("label_3")
        self.gridLayout.addWidget(self.label_3, 2, 0, 1, 1)
        self.lineEdit_3 = QtWidgets.QLineEdit(self.centralwidget)
        self.lineEdit_3.setMinimumSize(QtCore.QSize(0, 30))
        self.lineEdit_3.setSizeIncrement(QtCore.QSize(0, 0))
        self.lineEdit_3.setObjectName("lineEdit_3")
        self.gridLayout.addWidget(self.lineEdit_3, 2, 1, 1, 2)
        LoginActivity.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(LoginActivity)
        self.statusbar.setObjectName("statusbar")
        LoginActivity.setStatusBar(self.statusbar)

        self.retranslateUi(LoginActivity)
        QtCore.QMetaObject.connectSlotsByName(LoginActivity)
        LoginActivity.setTabOrder(self.lineEdit, self.lineEdit_2)
        LoginActivity.setTabOrder(self.lineEdit_2, self.lineEdit_3)
        LoginActivity.setTabOrder(self.lineEdit_3, self.pushButton)
        LoginActivity.setTabOrder(self.pushButton, self.pushButton_2)

    def retranslateUi(self, LoginActivity):
        _translate = QtCore.QCoreApplication.translate
        LoginActivity.setWindowTitle(_translate("LoginActivity", "MainWindow"))
        self.pushButton.setText(_translate("LoginActivity", "登陆"))
        self.label_2.setText(_translate("LoginActivity", "<html><head/><body><p align=\"center\"><span style=\" font-size:12pt;\">密码:</span></p></body></html>"))
        self.label.setText(_translate("LoginActivity", "<html><head/><body><p align=\"center\"><span style=\" font-size:12pt;\">账号:</span></p></body></html>"))
        self.pushButton_2.setText(_translate("LoginActivity", "注册"))
        self.label_3.setText(_translate("LoginActivity", "<html><head/><body><p align=\"center\"><span style=\" font-size:12pt;\">指令：</span></p></body></html>"))

3、将该登陆界面展现出来，导入上面的界面程序，代码如下：

from Ui_untitled import Ui_LoginActivity
import sys
from PyQt5.QtGui import QIcon  # 用于添加图标
from PyQt5.QtWidgets import QWidget,QMainWindow,QApplication
from PyQt5.QtCore import pyqtSlot

class Login_main(QMainWindow,Ui_LoginActivity):

    def __init__(self):
        super().__init__()  # 使用超类，继承父类的属性及方法
        self.setupUi(self)  # 构造窗体界面
        self.setWindowIcon(QIcon("./img/result.png")) #设置界面图标
        self.initUI()  # 构造功能函数

    def initUI(self):
        self.pushButton.setShortcut('Return')  # 设置快捷键
        self.setWindowTitle("登陆窗口")

if __name__ == "__main__":
    app = QApplication(sys.argv)
    login_ui = Login_main()
    login_ui.show()
    sys.exit(app.exec_())

4、制作程序的主界面，得到Ui_test_button.py界面程序文件【如下代码块】。

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

# Form implementation generated from reading ui file 'd:\Python_studyltem\软件登陆界面实现\test_button.ui'
#
# Created by: PyQt5 UI code generator 5.15.4
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(384, 350)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
        self.gridLayout.setObjectName("gridLayout")
        self.textBrowser = QtWidgets.QTextBrowser(self.centralwidget)
        self.textBrowser.setObjectName("textBrowser")
        self.gridLayout.addWidget(self.textBrowser, 3, 0, 1, 1)
        self.pushButton1 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton1.setObjectName("pushButton1")
        self.gridLayout.addWidget(self.pushButton1, 0, 0, 1, 1)
        self.pushButton2 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton2.setObjectName("pushButton2")
        self.gridLayout.addWidget(self.pushButton2, 1, 0, 1, 1)
        self.pushButton_3 = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton_3.setObjectName("pushButton_3")
        self.gridLayout.addWidget(self.pushButton_3, 2, 0, 1, 1)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 384, 23))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

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

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.pushButton1.setText(_translate("MainWindow", "测试按钮-1"))
        self.pushButton2.setText(_translate("MainWindow", "测试按钮-2"))
        self.pushButton_3.setText(_translate("MainWindow", "返回登陆状态"))

5、同样，将该主界面展现出来，导入上面的主界面py程序，代码如下：

from  Ui_test_button import Ui_MainWindow
import sys
from PyQt5.QtGui import QIcon  # 用于添加图标
from PyQt5.QtWidgets import QWidget,QMainWindow,QApplication
from PyQt5.QtCore import pyqtSlot

class Test_window(QMainWindow,Ui_MainWindow):  # 继承至界面文件的主窗口类
    
    def __init__(self):
        super().__init__()  # 使用超类，继承父类的属性及方法
        self.setupUi(self)  # 构造窗体界面
        self.setWindowIcon(QIcon("./img/result.png"))
        self.setWindowTitle("Test_button")  # 设置窗体主体
        self.initUI()  # 构造功能函数
    
    def initUI(self):
        #此处添加功能连接函数
        self.pushButton1.clicked.connect(self.bofang_video)  #自定义按钮连接自定义槽函数
        # self.pushButton1.pressed.connect()   #不同的按钮点击方式
        # self.pushButton1.released.connect()
    
    @pyqtSlot()
    def on_pushButton2_clicked(self): #利用QT自带槽函数直接连接按钮
        self.textBrowser.append("点击按钮2！")
        self.textBrowser.append("<font color=\"#00FF00\">点击按钮2！</font> ") #设置字体颜色
        self.textBrowser.append("======================")
        
    def bofang_video(self):
        print("123")
        self.textBrowser.append("点击按钮1！")
        self.textBrowser.append("<font color=\"#FF0000\">点击按钮1！</font> ") #设置字体颜色
        self.textBrowser.append("======================")

if __name__ == "__main__":
    app = QApplication(sys.argv)
    ui2 = Test_window()
    ui2.show()
    sys.exit(app.exec_())

6、当前，已经将登陆界面和主界面运行程序成功完成，接下就是将两个界面程序，放入到一个app程序中监控，并同时操控两个界面程序，代码如下；

from login import Login_main
from test_main import Test_window 
import sys
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QMessageBox

'''
调用两个界面，点击退出，可退回界面
'''

# 保存自定义账号和密码
save_information = {"save_zhanghao":["admin",]}
save_information_password = {"password":["19970128",]}


# 登陆流程
def control_ui():
    zhanghao = login_ui.lineEdit.text()
    password = login_ui.lineEdit_2.text()
    if zhanghao in save_information.get("save_zhanghao"):
        zhanghao_ret = True
    else:
        print("账号不存在！")
        QMessageBox.warning(login_ui,"警告", "账号不存在！", QMessageBox.Cancel)
        zhanghao_ret = False
        return
    if password in save_information_password.get("password"):
        password_ret = True
    else:
        print("密码输入错误！")
        QMessageBox.warning(login_ui,"警告", "密码输入错误！", QMessageBox.Cancel)
        password_ret = False
        return
    if zhanghao_ret == True and password_ret == True:
        # 打开主界面
        print("打开主界面！")
        # 关闭登陆界面
        login_ui.close()
        # 打开主程序运行界面
        main_ui.show()

# 注册流程，未完善，可自行自定义完成
def zhuche():
    zhanghao = login_ui.lineEdit.text()
    password = login_ui.lineEdit_2.text()

    zhiling = login_ui.lineEdit_3.text()
    if zhiling == "8888":
        print("注册信息！")
        QMessageBox.warning(login_ui,"提示", "可以注册账号！", QMessageBox.Cancel)
    else:
        QMessageBox.warning(login_ui,"警告", "指令输入错误，无法注册账号！", QMessageBox.Cancel)


def back_login():
    login_ui.show()
    main_ui.close()
    login_ui.lineEdit.clear()
    login_ui.lineEdit_2.clear()

if __name__ == "__main__":
    app = QApplication(sys.argv)
    login_ui = Login_main()
    login_ui.pushButton.clicked.connect(control_ui)
    login_ui.pushButton_2.clicked.connect(zhuche)
    login_ui.show()
    main_ui = Test_window()
    main_ui.pushButton_3.clicked.connect(back_login)
    sys.exit(app.exec_())