pyqt5 登录界面的实现模板（加强版2）

【如下代码，完全复制，直接运行，即可使用】

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
import threading
################################################
#######创建主窗口
################################################
class MainWindow(QMainWindow):
    windowList = []
    def __init__(self, *args, **kwargs):
 super().__init__(*args, **kwargs)
 self.setWindowTitle('主界面')
 self.showMaximized()

 # 创建菜单栏
 self.createMenus()

    def createMenus(self):
 # 创建动作 注销
 self.printAction1 = QAction(self.tr("注销"), self)
 self.printAction1.triggered.connect(self.on_printAction1_triggered)

 # 创建动作 退出
 self.printAction2 = QAction(self.tr("退出"), self)
 self.printAction2.triggered.connect(self.on_printAction2_triggered)

 # 创建菜单，添加动作
 self.printMenu = self.menuBar().addMenu(self.tr("注销和退出"))
 self.printMenu.addAction(self.printAction1)
 self.printMenu.addAction(self.printAction2)




    # 动作一：注销
    def on_printAction1_triggered(self):
 self.close()
 dialog = logindialog(mode=1)
 if  dialog.exec_()==QDialog.Accepted:
     the_window = MainWindow()
     self.windowList.append(the_window)    #这句一定要写，不然无法重新登录
     the_window.show()



    # 动作二：退出
    def on_printAction2_triggered(self):
 self.close()



    # 关闭界面触发事件
    def closeEvent(self, event):
 print(999999999)
 pass

################################################
#######对话框
################################################
class logindialog(QDialog):
    def __init__(self,mode=0, *args, **kwargs):
 super().__init__(*args, **kwargs)
 self.mode = mode
 self.setWindowTitle('登录界面')
 self.resize(200, 200)
 self.setFixedSize(self.width(), self.height())
 self.setWindowFlags(Qt.WindowCloseButtonHint)

 ###### 设置界面控件
 self.frame = Qframe(self)
 self.verticalLayout = QVBoxLayout(self.frame)

 self.lineEdit_account = QLineEdit()
 self.lineEdit_account.setPlaceholderText("请输入账号")
 self.verticalLayout.addWidget(self.lineEdit_account)

 self.lineEdit_password = QLineEdit()
 self.lineEdit_password.setPlaceholderText("请输入密码")
 self.verticalLayout.addWidget(self.lineEdit_password)

 self.checkBox_remeberpassword = QCheckBox()
 self.checkBox_remeberpassword.setText("记住密码")
 self.verticalLayout.addWidget(self.checkBox_remeberpassword)

 self.checkBox_autologin = QCheckBox()
 self.checkBox_autologin.setText("自动登录")
 self.verticalLayout.addWidget(self.checkBox_autologin)


 self.pushButton_enter = QPushButton()
 self.pushButton_enter.setText("确定")
 self.verticalLayout.addWidget(self.pushButton_enter)

 self.pushButton_quit = QPushButton()
 self.pushButton_quit.setText("取消")
 self.verticalLayout.addWidget(self.pushButton_quit)

 ###### 绑定按钮事件
 self.pushButton_enter.clicked.connect(self.on_pushButton_enter_clicked)
 self.pushButton_quit.clicked.connect(QCoreApplication.instance().quit)


 ####初始化登录信息
 self.init_login_info()


 ####自动登录
 self.timer = QTimer(self)
 self.timer.timeout.connect(self.goto_autologin)
 self.timer.setSingleShot(True)
 self.timer.start(1000)



    # 自动登录
    def goto_autologin(self):
 if self.checkBox_autologin.isChecked()==True and self.mode == 0 :
    self.on_pushButton_enter_clicked()




    def on_pushButton_enter_clicked(self):
 # 账号判断
 if self.lineEdit_account.text() == "":
     return

 # 密码判断
 if self.lineEdit_password.text() == "":
     return


 ####### 保存登录信息
 self.save_login_info()

 # 通过验证，关闭对话框并返回1
 self.accept()



    # 保存登录信息
    def save_login_info(self):
 settings = QSettings("config.ini", QSettings.IniFormat) #方法1：使用配置文件
 #settings = QSettings("mysoft","myapp")   #方法2：使用注册表
 settings.setValue("account",self.lineEdit_account.text())
 settings.setValue("password", self.lineEdit_password.text())
 settings.setValue("remeberpassword", self.checkBox_remeberpassword.isChecked())
 settings.setValue("autologin", self.checkBox_autologin.isChecked())



    # 初始化登录信息
    def init_login_info(self):
 settings = QSettings("config.ini", QSettings.IniFormat) #方法1：使用配置文件
 #settings = QSettings("mysoft","myapp")   #方法2：使用注册表
 the_account =settings.value("account")
 the_password = settings.value("password")
 the_remeberpassword = settings.value("remeberpassword")
 the_autologin = settings.value("autologin")
 ########
 self.lineEdit_account.setText(the_account)
 if the_remeberpassword=="true" or  the_remeberpassword==True:
     self.checkBox_remeberpassword.setChecked(True)
     self.lineEdit_password.setText(the_password)

 if the_autologin=="true" or  the_autologin==True:
     self.checkBox_autologin.setChecked(True)


################################################
#######程序入门
################################################
if __name__ == "__main__":
    app = QApplication(sys.argv)
    dialog = logindialog(mode=0)
    if  dialog.exec_()==QDialog.Accepted:
 the_window = MainWindow()
 the_window.show()
 sys.exit(app.exec_())