pyqt5 动态创建菜单的问题

Question

有个项目需要动态创建菜单，可用框架为：

from PyQt5 import QtCore, QtGui, QtWidgets
import sys

class Ui_MainWindow(QtWidgets.QMainWindow):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 23))
        self.menubar.setObjectName("menubar")
        self.menu = QtWidgets.QMenu(self.menubar)
        self.menu.setObjectName("menu")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)


        self.action0=QtWidgets.QAction(MainWindow)
        self.action0.triggered.connect(lambda: print(0))
        self.menu.addAction(self.action0)

        self.action1=QtWidgets.QAction(MainWindow)
        self.action1.triggered.connect(lambda: print(1))
        self.menu.addAction(self.action1)

        self.action2=QtWidgets.QAction(MainWindow)
        self.action2.triggered.connect(lambda: print(2))
        self.menu.addAction(self.action2)


        self.menubar.addAction(self.menu.menuAction())

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.menu.setTitle(_translate("MainWindow", "文件"))
        self.action0.setText(_translate("MainWindow", "打开"))
        self.action1.setText(_translate("MainWindow", "保存"))
        self.action2.setText(_translate("MainWindow", "另存为…"))

if __name__=="__main__":
    app=QtWidgets.QApplication(sys.argv)

    win=QtWidgets.QMainWindow()
    ui=Ui_MainWindow()
    ui.setupUi(win)
    win.show()

    sys.exit(app.exec_())

但需要的菜单不是固定的，而是根据数据库中的内容动态改变的。将上面的代码改为：

self.action=[]

        for i in range(3):
            self.action.append(QtWidgets.QAction(MainWindow))
            self.action[i].triggered.connect(lambda: print(i))
            self.menu.addAction(self.action[i])

之后，print结果都为 2

求解决方法/、

Answer 1

# -*- coding: utf-8 -*-
from PyQt5 import QtCore,QtWidgets


class Ui_MainWindow(QtWidgets.QMainWindow):
    def setupUi(self,MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800,600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0,0,800,23))
        self.menubar.setObjectName("menubar")
        # self.menu = QtWidgets.QMenu(self.menubar)
        # self.menu.setObjectName("menu")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)
        
        # self.action0 = QtWidgets.QAction(MainWindow)
        # self.action0.triggered.connect(lambda:print(0))
        # self.menu.addAction(self.action0)
        #
        # self.action1 = QtWidgets.QAction(MainWindow)
        # self.action1.triggered.connect(lambda:print(1))
        # self.menu.addAction(self.action1)
        #
        # self.action2 = QtWidgets.QAction(MainWindow)
        # self.action2.triggered.connect(lambda:print(2))
        # self.menu.addAction(self.action2)
        
        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)
    
    def retranslateUi(self,MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow","MainWindow"))
        
        # self.menu.setTitle(_translate("MainWindow","文件"))
        # self.action0.setText(_translate("MainWindow","打开"))
        # self.action1.setText(_translate("MainWindow","保存"))
        # self.action2.setText(_translate("MainWindow","另存为…"))
        # 定义 key为菜单 value为子菜单
        self.action = [{"文件":["打开","保存","另存为…"]},{"文件1":["打开","保存","另存为…"]}]
        # 遍历所有    action 提取出菜单 子菜单
        for i in self.action:
            for k,v in i.items():
                self.menu = QtWidgets.QMenu(self.menubar)
                self.menu.setObjectName("menu")
                self.menubar.addAction(self.menu.menuAction())
                self.menu.setTitle(_translate("MainWindow",k))
                for c in range(len(v)):
                    action0 = QtWidgets.QAction(MainWindow)
                    action0.triggered.connect(lambda:print(v[c]))
                    self.menu.addAction( action0)
                    action0.setText(_translate("MainWindow",v[c]))
                    del  action0


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    
    win = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(win)
    win.show()
    
    sys.exit(app.exec_())

有帮助请点一下右上角的采纳,谢谢