选项菜单

效果如下：
 1 """
 2 ZetCode PyQt5 tutorial
 3 This program creates a checkable menu.
 4 """
 5 
 6 import sys
 7 from PyQt5.QtWidgets import QMainWindow, QAction, QApplication
 8 
 9 
10 class Example(QMainWindow):
11 
12     def __init__(self):
13         super().__init__()
14 
15         self.initUI()
16 
17     def initUI(self):
18 
19         self.statusbar = self.statusBar()
20         self.statusbar.showMessage('Ready')
21 
22         menubar = self.menuBar()
23         viewMenu = menubar.addMenu('View')
24 
25         # 使用checkable选项，我们创建了一个可选择菜单
26         viewStatAct = QAction('View statusbar', self, checkable=True)
27 
28         viewStatAct.setStatusTip('View statusbar')
29         viewStatAct.setChecked(True)
30         viewStatAct.triggered.connect(self.toggleMenu)
31 
32         viewMenu.addAction(viewStatAct)
33 
34         self.setGeometry(300, 300, 300, 200)
35         self.setWindowTitle('Check menu')
36         self.show()
37 
38     def toggleMenu(self, state):
39 
40         if state:
41             self.statusbar.show()
42         else:
43             self.statusbar.hide()
44 
45 
46 if __name__ == '__main__':
47 
48     app = QApplication(sys.argv)
49     ex = Example()
50     sys.exit(app.exec_())