我正在创建一个待办程序。我有一个侧菜单(只是vbox中的qpushbutton)和一个显示内容的主窗口小部件。然而，我需要一种方法来显示不同的内容在主窗口小部件的基础上是什么侧菜单按钮按下。我尝试过使用QStackedLayout，但我不喜欢它关闭主窗口并切换到新窗口的方式。我也尝试过使用QTabWidget，但是标签页在顶部。有没有一种方法可以将QTabWidget子类化并创建一个带有标签按钮的自定义QTabWidget？如果没有，有没有办法？上面的图片就是我目前所拥有的。在

这是我所有的代码：from PyQt5 import QtCore, QtGui, QtWidgets, uic

from PyQt5.QtCore import Qt

from PyQt5.QtWidgets import *

from datetime import date

import sys

months = ["January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November",

"December"]

stylesheet = """

QWidget{

background-color: white;

}

QWidget#sideMenuBackground{

background-color: #f7f7f7;

}

QVBoxLayout#sideMenuLayout{

background-color: grey;

}

QPushButton#sideMenuButton{

text-align: left;

border: none;

background-color: #f7f7f7;

max-width: 10em;

font: 16px;

padding: 6px;

}

QPushButton#sideMenuButton:hover{

font: 18px;

}

QLabel#today_label{

font: 25px;

max-width: 70px;

}

QLabel#todays_date_label{

font: 11px;

color: grey;

}

QPushButton#addTodoEventButton{

border: none;

max-width: 130px;

}

"""

class MainWindow(QtWidgets.QMainWindow):

def __init__(self):

super().__init__()

self.setWindowTitle("To-Do Application")

self.setGeometry(200, 200, 800, 500)

self.initUI()

def initUI(self):

self.nextWeekPage = QtWidgets.QLabel()

backgroundWidget = QtWidgets.QWidget()

backgroundWidget.setObjectName("sideMenuBackground")

backgroundWidget.setFixedWidth(150)

layout = QtWidgets.QHBoxLayout()

layout.addWidget(backgroundWidget)

sideMenuLayout = QtWidgets.QVBoxLayout()

sideMenuLayout.setObjectName("sideMenuLayout")

taskLayout = QtWidgets.QVBoxLayout()

backgroundWidget.setLayout(sideMenuLayout)

layout.addLayout(taskLayout)

self.setSideMenu(sideMenuLayout)

sideMenuLayout.addStretch(0)

self.setMainLayout(taskLayout)

taskLayout.addStretch(0)

mainWidget = QtWidgets.QWidget()

mainWidget.setLayout(layout)

self.setCentralWidget(mainWidget)

def setSideMenu(self, layout):

self.todayButton = QtWidgets.QPushButton(" Today")

self.nextWeekButton = QtWidgets.QPushButton("Next 7 Days")

self.calendarButton = QtWidgets.QPushButton("Calendar")

sideMenuButtons = [self.todayButton, self.nextWeekButton, self.calendarButton]

for button in sideMenuButtons:

button.setObjectName("sideMenuButton")

layout.addWidget(button)

sideMenuButtons[0].setIcon(QtGui.QIcon("today icon.png"))

sideMenuButtons[1].setIcon(QtGui.QIcon("week icon.png"))

sideMenuButtons[2].setIcon(QtGui.QIcon("calendar icon.png"))

sideMenuButtons[0].pressed.connect(self.todayButtonPress)

sideMenuButtons[1].pressed.connect(self.nextWeekButtonPress)

sideMenuButtons[2].pressed.connect(self.calendarButtonPress)

def setMainLayout(self, layout):

today_label_widget = QtWidgets.QWidget()

today_label_layout = QtWidgets.QHBoxLayout()

layout.addWidget(today_label_widget)

today_label_widget.setLayout(today_label_layout)

month = date.today().month

day = date.today().day

today = f"{months[month - 1]}{day}"

self.todays_date = QtWidgets.QLabel(today)

self.todays_date.setObjectName("todays_date_label")

self.today_label = QtWidgets.QLabel("Today")

self.today_label.setObjectName("today_label")

self.addTodoEventButton = QtWidgets.QPushButton()

self.addTodoEventButton.setObjectName("addTodoEventButton")

self.addTodoEventButton.setIcon(QtGui.QIcon("add event button.png"))

self.addTodoEventButton.setToolTip("Add To Do Event")

today_label_layout.addWidget(self.today_label)

today_label_layout.addWidget(self.todays_date)

today_label_layout.addWidget(self.addTodoEventButton)

self.labels = ["button1", "button2", "button3", "button4", "Button5"]

for today_events in self.labels:

label = QtWidgets.QLabel(today_events)

layout.addWidget(label)

def addTodoEvent(self):

pass

def todayButtonPress(self):

print("today button pressed")

def nextWeekButtonPress(self):

print("Next week button pressed")

def calendarButtonPress(self):

print("calendar button pressed")

def main():

app = QtWidgets.QApplication(sys.argv)

app.setStyleSheet(stylesheet)

window = MainWindow()

window.show()

app.exec_()

if __name__ == "__main__":

main()