选项菜单

效果如下：

"""
ZetCode PyQt5 tutorial
This program creates a checkable menu.
"""

import sys
from PyQt5.QtWidgets import QMainWindow, QAction, QApplication


class Example(QMainWindow):

    def __init__(self):
        super().__init__()

        self.initUI()

    def initUI(self):

        self.statusbar = self.statusBar()
        self.statusbar.showMessage('Ready')

        menubar = self.menuBar()
        viewMenu = menubar.addMenu('View')

        # 使用checkable选项，我们创建了一个可选择菜单
        viewStatAct = QAction('View statusbar', self, checkable=True)

        viewStatAct.setStatusTip('View statusbar')
        viewStatAct.setChecked(True)
        viewStatAct.triggered.connect(self.toggleMenu)

        viewMenu.addAction(viewStatAct)

        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('Check menu')
        self.show()

    def toggleMenu(self, state):

        if state:
            self.statusbar.show()
        else:
            self.statusbar.hide()


if __name__ == '__main__':

    app = QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())