pyqt5 登录界面的实现模板（加强版）
说明 本例，在登录界面第一版的基础上，增加了主界面的注销功能和退出功能。 注销功能 # 动作一：注销 def on_printAction1_triggered(self): self.close() dialog = logindialog() 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() 退出功能 # 动作二：退出 def on_printAction2_triggered(self): self.close() 还是很简单的吧，好了，下面给出完整代码。 完整代码 【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 * ################################################ #######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() 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, *args, **kwargs): super().__init__(*args, **kwargs) 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.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) 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 # 通过验证，关闭对话框并返回1 self.accept() ################################################ #######程序入门 ################################################ if __name__ == "__main__": app = QApplication(sys.argv) dialog = logindialog() if dialog.exec_()==QDialog.Accepted: the_window = MainWindow() the_window.show() sys.exit(app.exec_()) 本文如有帮助，敬请留言鼓励。本文如有错误，敬请留言改进。
