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_())
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