快捷键在托盘下拉菜单中的PyQt5中不起作用

import sys
from PyQt5.QtWidgets import QApplication, QMenu, QAction, QSystemTrayIcon
from PyQt5.QtGui import QIcon
from PyQt5.QtCore import Qt

def on_menu_item_triggered():
    print("快捷键触发了")

app = QApplication(sys.argv)

# 创建系统托盘图标
tray_icon = QSystemTrayIcon(QIcon("icon.png"), app)
tray_icon.show()

# 创建自定义菜单
menu = QMenu()
tray_icon.setContextMenu(menu)

# 创建菜单项，并添加到自定义菜单中
menu_item = QAction("菜单项", menu)
menu.addAction(menu_item)

# 设置菜单项的快捷键
menu_item.setShortcut(Qt.Key_F1)

# 监听菜单项的触发事件
menu_item.triggered.connect(on_menu_item_triggered)

sys.exit(app.exec_())