pyqt5实现多界面跳转--走坑史（不用第三个模块操作！）

最近使用pyqt5做GUI界面，拖拽控件可以将界面设计得很漂亮，但是不会多界面之间的跳转，比如点击一个button就进入第二个界面，第一个界面关闭，关闭第二个界面又进入主界面，如果看到这里你心里正想：对！这就是我想知道的！看完这篇博客就会明白如何实现，本博客将介绍上述功能的实现方法以及本人的走坑史~

首先是两个界面的实现，我使用拖拽控件实现的，下面是两个界面截图，分别为主界面和子界面：

然后由ui文件转化成的py文件如下：
管理员界面：

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file
#
# Created by: PyQt5 UI code generator 5.13.0
#
# WARNING! All changes made in this file will be lost!


from PyQt5 import QtCore, QtGui, QtWidgets


class AdminPage(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(455, 525)
        self.horizontalLayout = QtWidgets.QHBoxLayout(Form)
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.groupBox = QtWidgets.QGroupBox(Form)
        self.groupBox.setToolTipDuration(1)
        self.groupBox.setObjectName("groupBox")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.groupBox)
        self.verticalLayout.setObjectName("verticalLayout")
        self.personal_page = QtWidgets.QPushButton(self.groupBox)
        self.personal_page.setObjectName("personal_page")
        self.verticalLayout.addWidget(self.personal_page)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.supplier = QtWidgets.QPushButton(self.groupBox)
        self.supplier.setObjectName("supplier")
        self.horizontalLayout_2.addWidget(self.supplier)
        self.buyer = QtWidgets.QPushButton(self.groupBox)
        self.buyer.setObjectName("buyer")
        self.horizontalLayout_2.addWidget(self.buyer)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        self.purchase_info = QtWidgets.QPushButton(self.groupBox)
        self.purchase_info.setObjectName("purchase_info")
        self.horizontalLayout_4.addWidget(self.purchase_info)
        self.funds_info = QtWidgets.QPushButton(self.groupBox)
        self.funds_info.setObjectName("funds_info")
        self.horizontalLayout_4.addWidget(self.funds_info)
        self.verticalLayout.addLayout(self.horizontalLayout_4)
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_3.setSizeConstraint(QtWidgets.QLayout.SetDefaultConstraint)
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.stock_info = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.stock_info.sizePolicy().hasHeightForWidth())
        self.stock_info.setSizePolicy(sizePolicy)
        self.stock_info.setObjectName("stock_info")
        self.horizontalLayout_3.addWidget(self.stock_info)
        self.verticalLayout.addLayout(self.horizontalLayout_3)
        self.horizontalLayout_5 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_5.setObjectName("horizontalLayout_5")
        self.back = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.back.sizePolicy().hasHeightForWidth())
        self.back.setSizePolicy(sizePolicy)
        self.back.setObjectName("back")
        self.horizontalLayout_5.addWidget(self.back)
        self.verticalLayout.addLayout(self.horizontalLayout_5)
        self.horizontalLayout.addWidget(self.groupBox)

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

    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "admin"))
        self.groupBox.setTitle(_translate("Form", "管理员界面"))
        self.personal_page.setText(_translate("Form", "个人主页"))
        self.supplier.setText(_translate("Form", "管理供应商信息"))
        self.buyer.setText(_translate("Form", "管理进货员"))
        self.purchase_info.setText(_translate("Form", "查看进货信息"))
        self.funds_info.setText(_translate("Form", "查看资金信息"))
        self.stock_info.setText(_translate("Form", "查询库存信息"))
        self.back.setText(_translate("Form", "返回主界面"))

个人主页界面：

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 
#
# Created by: PyQt5 UI code generator 5.13.0
#
# WARNING! All changes made in this file will be lost!


from PyQt5 import QtCore, QtGui, QtWidgets


class PersonalInfo(object):
    def setupUi(self, Dialog):
        self.dialog = Dialog
        self.dialog.setObjectName("Dialog")
        self.dialog.resize(578, 596)
        self.horizontalLayout = QtWidgets.QHBoxLayout(self.dialog)
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.groupBox = QtWidgets.QGroupBox(self.dialog)
        self.groupBox.setObjectName("groupBox")
        self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.groupBox)
        self.verticalLayout_2.setObjectName("verticalLayout_2")
        self.verticalLayout = QtWidgets.QVBoxLayout()
        self.verticalLayout.setObjectName("verticalLayout")
        self.horizontalLayout_5 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_5.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_5.setObjectName("horizontalLayout_5")
        self.name_label = QtWidgets.QLabel(self.groupBox)
        self.name_label.setObjectName("name_label")
        self.horizontalLayout_5.addWidget(self.name_label)
        self.name_line_edit = QtWidgets.QLineEdit(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(9)
        sizePolicy.setHeightForWidth(self.name_line_edit.sizePolicy().hasHeightForWidth())
        self.name_line_edit.setSizePolicy(sizePolicy)
        self.name_line_edit.setObjectName("name_line_edit")
        self.horizontalLayout_5.addWidget(self.name_line_edit)
        self.horizontalLayout_5.setStretch(0, 3)
        self.horizontalLayout_5.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_5)
        self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_4.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        self.order_label = QtWidgets.QLabel(self.groupBox)
        self.order_label.setObjectName("order_label")
        self.horizontalLayout_4.addWidget(self.order_label)
        self.order_line_edit = QtWidgets.QLineEdit(self.groupBox)
        self.order_line_edit.setObjectName("order_line_edit")
        self.horizontalLayout_4.addWidget(self.order_line_edit)
        self.horizontalLayout_4.setStretch(0, 3)
        self.horizontalLayout_4.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_4)
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_3.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.tele_label = QtWidgets.QLabel(self.groupBox)
        self.tele_label.setObjectName("tele_label")
        self.horizontalLayout_3.addWidget(self.tele_label)
        self.tele_line_edit = QtWidgets.QLineEdit(self.groupBox)
        self.tele_line_edit.setObjectName("tele_line_edit")
        self.horizontalLayout_3.addWidget(self.tele_line_edit)
        self.horizontalLayout_3.setStretch(0, 3)
        self.horizontalLayout_3.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_3)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.address_label = QtWidgets.QLabel(self.groupBox)
        self.address_label.setObjectName("address_label")
        self.horizontalLayout_2.addWidget(self.address_label)
        self.address_line_edit = QtWidgets.QLineEdit(self.groupBox)
        self.address_line_edit.setObjectName("address_line_edit")
        self.horizontalLayout_2.addWidget(self.address_line_edit)
        self.horizontalLayout_2.setStretch(0, 3)
        self.horizontalLayout_2.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        self.verticalLayout_2.addLayout(self.verticalLayout)
        self.horizontalLayout_6 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_6.setObjectName("horizontalLayout_6")
        self.save_pushButton = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.save_pushButton.sizePolicy().hasHeightForWidth())
        self.save_pushButton.setSizePolicy(sizePolicy)
        self.save_pushButton.setObjectName("save_pushButton")
        self.horizontalLayout_6.addWidget(self.save_pushButton)
        self.back_pushButton = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.back_pushButton.sizePolicy().hasHeightForWidth())
        self.back_pushButton.setSizePolicy(sizePolicy)
        self.back_pushButton.setObjectName("back_pushButton")
        self.horizontalLayout_6.addWidget(self.back_pushButton)
        self.verticalLayout_2.addLayout(self.horizontalLayout_6)
        self.horizontalLayout.addWidget(self.groupBox)

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

    def retranslateUi(self):
        _translate = QtCore.QCoreApplication.translate
        self.dialog.setWindowTitle(_translate("Dialog", "Dialog"))
        self.groupBox.setTitle(_translate("Dialog", "个人主页"))
        self.name_label.setToolTip(_translate("Dialog", "<html><head/><body><p><span style=\" font-size:12pt;\">姓名</span></p></body></html>"))
        self.name_label.setText(_translate("Dialog", "<html><head/><body><p><span style=\" font-size:14pt;\">姓名</span></p></body></html>"))
        self.order_label.setText(_translate("Dialog", "<html><head/><body><p><span style=\" font-size:14pt;\">编号</span></p></body></html>"))
        self.tele_label.setText(_translate("Dialog", "<html><head/><body><p><span style=\" font-size:14pt;\">联系方式</span></p></body></html>"))
        self.address_label.setText(_translate("Dialog", "<html><head/><body><p><span style=\" font-size:14pt;\">地址</span></p></body></html>"))
        self.save_pushButton.setText(_translate("Dialog", "保存信息"))
        self.back_pushButton.setText(_translate("Dialog", "返回"))
        

这里需要注意的是，如果你所跳转的界面有多个，只能有QWidget界面，不能有多个，其他几个只能使用QDialoge界面，如果说你设计的时候不小心设计的是多个QWidget界面怎么办呢？不用担心，你会发现从ui文件生成的py文件只是一个接口形式的，那么它到时候是什么类型界面只是和你的传入的Form有关。

下面说说我的采坑史：
一开始上网上找很久，发现很多人的实现方式是重新写一个新的脚本，然后用这个新的脚本实现两个界面之间的跳转，至于多个界面因为没有展示，所以我也不知道那种方法是否可行，且不说可行，这个“第三者”总让人感觉有点冗余，所以我希望直接用生成的两个py脚本文件稍作修改，实现跳转，我的第一个版本是这样的：首先在AdminStage类里添加一个__init__()方法：

class AdminPage(object):
    def __init__(self, parent_window=None):
        if parent_window:
            parent_window.destroy()  # 销毁主界面
        self.app = QtWidgets.QApplication(sys.argv)
        widget = QtWidgets.QWidget()
        self.Form = None
        self.setupUi(widget)
        widget.show()
        sys.exit(self.app.exec_())
......

然后再在按钮那里添加一个signal:

self.personal_page.clicked.connect(lambda: self.personal_info(self.Form))

其中self.personal_info()内容如下：

    def personal_info(self):
        obj = PersonalInfo()

然后想当然地在PersonalInfo类里也添加相似的内容：

class PersonalInfo(object):
    def __init__(self, parent_window=None):
        if parent_window:
            parent_window.destroy()  # 销毁主界面
        app = QtWidgets.QApplication(sys.argv)
        widget = QtWidgets.QDialog()  
        self.dialog = None
        self.setupUi(widget)  # 界面是什么类型的只和这里的widget有关
        widget.show()
        sys.exit(app.exec_())
......

运行之后报错：

QCoreApplication::exec: The event loop is already running

后来才弄懂一个程序里只能有一个app，于是乎，我将PersonalInfo类里的app = QtWidgets.QApplication(sys.argv)和sys.exit(app.exec_())注释掉，运行，发现还是不行，曾一度有手动敲代码实现界面的冲动…

后来发现一种方法可以实现，将AdminStage类修改如下：

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 
#
# Created by: PyQt5 UI code generator 5.13.0
#
# WARNING! All changes made in this file will be lost!

import sys
import tkinter as tk
from PyQt5 import QtCore, QtGui, QtWidgets
from PersonalInfo import PersonalInfo
from PyQt5.QtWidgets import QApplication,QMainWindow,QDialog
import os
from PyQt5.QtCore import pyqtSignal

class AdminPage(object):
    def __init__(self):
        self.app = QtWidgets.QApplication(sys.argv)
        widget = QtWidgets.QWidget()
        self.Form = None
        self.setupUi(widget)
        widget.show()
        sys.exit(self.app.exec_())
        # self.app.exec_()

    def setupUi(self, Form):
        self.Form = Form
        self.Form.setObjectName("Form")
        self.Form.resize(455, 525)
        self.horizontalLayout = QtWidgets.QHBoxLayout(self.Form)
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.groupBox = QtWidgets.QGroupBox(self.Form)
        self.groupBox.setToolTipDuration(1)
        self.groupBox.setObjectName("groupBox")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.groupBox)
        self.verticalLayout.setObjectName("verticalLayout")
        self.personal_page = QtWidgets.QPushButton(self.groupBox)
        self.personal_page.setObjectName("personal_page")
        self.verticalLayout.addWidget(self.personal_page)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.supplier = QtWidgets.QPushButton(self.groupBox)
        self.supplier.setObjectName("supplier")
        self.horizontalLayout_2.addWidget(self.supplier)
        self.buyer = QtWidgets.QPushButton(self.groupBox)
        self.buyer.setObjectName("buyer")
        self.horizontalLayout_2.addWidget(self.buyer)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        self.purchase_info = QtWidgets.QPushButton(self.groupBox)
        self.purchase_info.setObjectName("purchase_info")
        self.horizontalLayout_4.addWidget(self.purchase_info)
        self.funds_info = QtWidgets.QPushButton(self.groupBox)
        self.funds_info.setObjectName("funds_info")
        self.horizontalLayout_4.addWidget(self.funds_info)
        self.verticalLayout.addLayout(self.horizontalLayout_4)
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_3.setSizeConstraint(QtWidgets.QLayout.SetDefaultConstraint)
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.stock_info = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.stock_info.sizePolicy().hasHeightForWidth())
        self.stock_info.setSizePolicy(sizePolicy)
        self.stock_info.setObjectName("stock_info")
        self.horizontalLayout_3.addWidget(self.stock_info)
        self.verticalLayout.addLayout(self.horizontalLayout_3)
        self.horizontalLayout_5 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_5.setObjectName("horizontalLayout_5")
        self.back = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.back.sizePolicy().hasHeightForWidth())
        self.back.setSizePolicy(sizePolicy)
        self.back.setObjectName("back")
        self.horizontalLayout_5.addWidget(self.back)
        self.verticalLayout.addLayout(self.horizontalLayout_5)
        self.horizontalLayout.addWidget(self.groupBox)
        # 个人信息
        # self.personal_page.clicked.connect(lambda: self.personal_info(self.Form))
        self.personal_page.clicked.connect(lambda: self.personal_info())

        self.retranslateUi()
        QtCore.QMetaObject.connectSlotsByName(self.Form)
    
    def personal_info(self):       
        self.Form.hide()           
        dialog1 = QtWidgets.QDialog()
        personalPage = PersonalInfo()
        personalPage.setupUi(dialog1)
        dialog1.show()
        dialog1.exec_()
        self.Form.show()

    def retranslateUi(self):
        _translate = QtCore.QCoreApplication.translate
        self.Form.setWindowTitle(_translate("self.Form", "admin"))
        self.groupBox.setTitle(_translate("Form", "管理员界面"))
        self.personal_page.setText(_translate("Form", "个人主页"))
        self.supplier.setText(_translate("Form", "管理供应商信息"))
        self.buyer.setText(_translate("Form", "管理进货员"))
        self.purchase_info.setText(_translate("Form", "查看进货信息"))
        self.funds_info.setText(_translate("Form", "查看资金信息"))
        self.stock_info.setText(_translate("Form", "查询库存信息"))
        self.back.setText(_translate("Form", "返回主界面"))


if __name__ == '__main__':
    obj = AdminPage()

特别注意personal_info()函数，其中的self.Form.hide()是实现跳转前将主界面隐藏，如果关闭personalPage界面，主界面进程会触发下面的self.Form.show()会再次显示主界面，所以如果没有self.Form.show()那么关闭PersonPage界面之后直接结束进程。
然后我的PersonalPage界面的代码最后如下：

# -*- coding: utf-8 -*-

# Created by: PyQt5 UI code generator 5.13.0
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QApplication,QMainWindow,QDialog


class PersonalInfo(object):
    def __init__(self):
        pass
        # if parent_window:
        #     parent_window.destroy()  # 销毁主界面
        # app = QtWidgets.QApplication(sys.argv)
        # widget = QtWidgets.QDialog()
        # self.PersonalInfo = None
        # self.setupUi(widget)
        # widget.show()
        # sys.exit(app.exec_())

    def setupUi(self, PersonalInfo):
        self.PersonalInfo = PersonalInfo
        self.PersonalInfo.setObjectName("PersonalInfo")
        self.PersonalInfo.resize(550, 564)
        self.horizontalLayout = QtWidgets.QHBoxLayout(self.PersonalInfo)
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.groupBox = QtWidgets.QGroupBox(self.PersonalInfo)
        self.groupBox.setObjectName("groupBox")
        self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.groupBox)
        self.verticalLayout_2.setObjectName("verticalLayout_2")
        self.verticalLayout = QtWidgets.QVBoxLayout()
        self.verticalLayout.setObjectName("verticalLayout")
        self.horizontalLayout_5 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_5.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_5.setObjectName("horizontalLayout_5")
        self.name_label = QtWidgets.QLabel(self.groupBox)
        self.name_label.setObjectName("name_label")
        self.horizontalLayout_5.addWidget(self.name_label)
        self.name_line_edit = QtWidgets.QLineEdit(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(9)
        sizePolicy.setHeightForWidth(self.name_line_edit.sizePolicy().hasHeightForWidth())
        self.name_line_edit.setSizePolicy(sizePolicy)
        self.name_line_edit.setObjectName("name_line_edit")
        self.horizontalLayout_5.addWidget(self.name_line_edit)
        self.horizontalLayout_5.setStretch(0, 3)
        self.horizontalLayout_5.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_5)
        self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_4.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        self.order_label = QtWidgets.QLabel(self.groupBox)
        self.order_label.setObjectName("order_label")
        self.horizontalLayout_4.addWidget(self.order_label)
        self.order_line_edit = QtWidgets.QLineEdit(self.groupBox)
        self.order_line_edit.setObjectName("order_line_edit")
        self.horizontalLayout_4.addWidget(self.order_line_edit)
        self.horizontalLayout_4.setStretch(0, 3)
        self.horizontalLayout_4.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_4)
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_3.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.tele_label = QtWidgets.QLabel(self.groupBox)
        self.tele_label.setObjectName("tele_label")
        self.horizontalLayout_3.addWidget(self.tele_label)
        self.tele_line_edit = QtWidgets.QLineEdit(self.groupBox)
        self.tele_line_edit.setObjectName("tele_line_edit")
        self.horizontalLayout_3.addWidget(self.tele_line_edit)
        self.horizontalLayout_3.setStretch(0, 3)
        self.horizontalLayout_3.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_3)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.address_label = QtWidgets.QLabel(self.groupBox)
        self.address_label.setObjectName("address_label")
        self.horizontalLayout_2.addWidget(self.address_label)
        self.address_line_edit = QtWidgets.QLineEdit(self.groupBox)
        self.address_line_edit.setObjectName("address_line_edit")
        self.horizontalLayout_2.addWidget(self.address_line_edit)
        self.horizontalLayout_2.setStretch(0, 3)
        self.horizontalLayout_2.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        self.verticalLayout_2.addLayout(self.verticalLayout)
        self.horizontalLayout_6 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_6.setObjectName("horizontalLayout_6")
        self.save_pushButton = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.save_pushButton.sizePolicy().hasHeightForWidth())
        self.save_pushButton.setSizePolicy(sizePolicy)
        self.save_pushButton.setObjectName("save_pushButton")
        self.horizontalLayout_6.addWidget(self.save_pushButton)
        self.back_pushButton = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.back_pushButton.sizePolicy().hasHeightForWidth())
        self.back_pushButton.setSizePolicy(sizePolicy)
        self.back_pushButton.setObjectName("back_pushButton")
        self.horizontalLayout_6.addWidget(self.back_pushButton)
        self.verticalLayout_2.addLayout(self.horizontalLayout_6)
        self.horizontalLayout.addWidget(self.groupBox)

        self.retranslateUi()
        QtCore.QMetaObject.connectSlotsByName(self.PersonalInfo)
    def retranslateUi(self):
        _translate = QtCore.QCoreApplication.translate
        self.PersonalInfo.setWindowTitle(_translate("PersonalInfo", "Form"))
        self.groupBox.setTitle(_translate("PersonalInfo", "个人主页"))
        self.name_label.setToolTip(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:12pt;\">姓名</span></p></body></html>"))
        self.name_label.setText(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:14pt;\">姓名</span></p></body></html>"))
        self.order_label.setText(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:14pt;\">编号</span></p></body></html>"))
        self.tele_label.setText(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:14pt;\">联系方式</span></p></body></html>"))
        self.address_label.setText(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:14pt;\">地址</span></p></body></html>"))
        self.save_pushButton.setText(_translate("PersonalInfo", "保存信息"))
        self.back_pushButton.setText(_translate("PersonalInfo", "返回"))

仅仅需要在开头加一个__init__(）方法即可，然后就可以实现上述的跳转功能了。发现如果不会用的话就会觉得pyqt5麻烦太多了，但是会用了还是非常方便的。

好了，刚刚介绍了两个界面，如果是三个或者更多呢？下面来说说如何实现：

我在上面的例子的基础上，再添加一个文件PersonalInfo2.py，（前面两个文件名好像忘了介绍，不好意思~前面两个文件名分别是：管理员界面.py和PersonalInfo.py，其中前者里面的类是AdminPage()，后者的类是PersonalInfo()）这个文件里的类是PersonalInfo()（对，如你所想，我偷偷把子一号类copy了一下），现在实现三个窗口之间的跳转：
在AdminPage类中，基本不动，就将personal_info()函数改成这样：

    def personal_info(self):       
        self.Form.hide()            
        dialog1 = QtWidgets.QDialog()
        personalPage = PersonalInfo()
        personalPage.setupUi(dialog1)
        dialog1.show()
        dialog1.exec_()
        dialog1.show()  # 新增
        dialog1.exec_()  # 新增
        self.Form.show()

对，就新增了两行，然后将两个个人主页界面加序号来标识一下，看左上角：

下面我实现的功能是：点击【返回】就回到管理员界面，点击【保存信息】就进入第二个个人主页界面，所以我为【保存信息】按钮添加一个signal，然后添加一个槽（函数）来实现功能：

然后PersonalPage2里边的【返回】按钮仍然能够实现返回功能，试试效果：

点击个人主页进入个人主页1：

点击返回我就不演示了，点击【保存信息】进入个人主页2：

然后点击【返回】，回到了个人主页1：

再点击【返回】就回到了管理员界面。这是三个嵌套的界面的实现，如果有更多的呢？那就按照这样的规律来改就行了。下面附上这三个.py文件的代码：
管理员界面.py:

# -*- coding: utf-8 -*-

#
# Created by: PyQt5 UI code generator 5.13.0
#
# WARNING! All changes made in this file will be lost!

import sys
import tkinter as tk
from PyQt5 import QtCore, QtGui, QtWidgets
from PersonalInfo import PersonalInfo
from PyQt5.QtWidgets import QApplication,QMainWindow,QDialog
import os
from PyQt5.QtCore import pyqtSignal, QEventLoop

class AdminPage(object):
    def __init__(self):
        self.app = QtWidgets.QApplication(sys.argv)
        widget = QtWidgets.QWidget()
        self.Form = None
        self.setupUi(widget)
        widget.show()
        sys.exit(self.app.exec_())
        # self.app.exec_()

    def setupUi(self, Form):
        self.Form = Form
        self.Form.setObjectName("Form")
        self.Form.resize(455, 525)
        self.horizontalLayout = QtWidgets.QHBoxLayout(self.Form)
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.groupBox = QtWidgets.QGroupBox(self.Form)
        self.groupBox.setToolTipDuration(1)
        self.groupBox.setObjectName("groupBox")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.groupBox)
        self.verticalLayout.setObjectName("verticalLayout")
        self.personal_page = QtWidgets.QPushButton(self.groupBox)
        self.personal_page.setObjectName("personal_page")
        self.verticalLayout.addWidget(self.personal_page)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.supplier = QtWidgets.QPushButton(self.groupBox)
        self.supplier.setObjectName("supplier")
        self.horizontalLayout_2.addWidget(self.supplier)
        self.buyer = QtWidgets.QPushButton(self.groupBox)
        self.buyer.setObjectName("buyer")
        self.horizontalLayout_2.addWidget(self.buyer)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        self.purchase_info = QtWidgets.QPushButton(self.groupBox)
        self.purchase_info.setObjectName("purchase_info")
        self.horizontalLayout_4.addWidget(self.purchase_info)
        self.funds_info = QtWidgets.QPushButton(self.groupBox)
        self.funds_info.setObjectName("funds_info")
        self.horizontalLayout_4.addWidget(self.funds_info)
        self.verticalLayout.addLayout(self.horizontalLayout_4)
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_3.setSizeConstraint(QtWidgets.QLayout.SetDefaultConstraint)
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.stock_info = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.stock_info.sizePolicy().hasHeightForWidth())
        self.stock_info.setSizePolicy(sizePolicy)
        self.stock_info.setObjectName("stock_info")
        self.horizontalLayout_3.addWidget(self.stock_info)
        self.verticalLayout.addLayout(self.horizontalLayout_3)
        self.horizontalLayout_5 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_5.setObjectName("horizontalLayout_5")
        self.back = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.back.sizePolicy().hasHeightForWidth())
        self.back.setSizePolicy(sizePolicy)
        self.back.setObjectName("back")
        self.horizontalLayout_5.addWidget(self.back)
        self.verticalLayout.addLayout(self.horizontalLayout_5)
        self.horizontalLayout.addWidget(self.groupBox)
        # 个人信息
        # self.personal_page.clicked.connect(lambda: self.personal_info(self.Form))
        self.personal_page.clicked.connect(lambda: self.personal_info())

        self.retranslateUi()
        QtCore.QMetaObject.connectSlotsByName(self.Form)
    
    def personal_info(self):       
        self.Form.hide()            
        dialog1 = QtWidgets.QDialog()
        personalPage = PersonalInfo()
        personalPage.setupUi(dialog1)
        dialog1.show()
        dialog1.exec_()
        dialog1.show()
        dialog1.exec_()
        self.Form.show()

    def retranslateUi(self):
        _translate = QtCore.QCoreApplication.translate
        self.Form.setWindowTitle(_translate("self.Form", "admin"))
        self.groupBox.setTitle(_translate("Form", "管理员界面"))
        self.personal_page.setText(_translate("Form", "个人主页"))
        self.supplier.setText(_translate("Form", "管理供应商信息"))
        self.buyer.setText(_translate("Form", "管理进货员"))
        self.purchase_info.setText(_translate("Form", "查看进货信息"))
        self.funds_info.setText(_translate("Form", "查看资金信息"))
        self.stock_info.setText(_translate("Form", "查询库存信息"))
        self.back.setText(_translate("Form", "返回主界面"))


if __name__ == '__main__':
    obj = AdminPage()

PersonalInfo.py文件：

# -*- coding: utf-8 -*-

# Created by: PyQt5 UI code generator 5.13.0
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QApplication,QMainWindow,QDialog
from PersonalInfo2 import PersonalInfo as PersonalInfo2


class PersonalInfo(object):
    def __init__(self):
        pass
        # if parent_window:
        #     parent_window.destroy()  # 销毁主界面
        # app = QtWidgets.QApplication(sys.argv)
        # widget = QtWidgets.QDialog()
        # self.PersonalInfo = None
        # self.setupUi(widget)
        # widget.show()
        # sys.exit(app.exec_())

    def setupUi(self, PersonalInfo):
        self.PersonalInfo = PersonalInfo
        self.PersonalInfo.setObjectName("PersonalInfo")
        self.PersonalInfo.resize(550, 564)
        self.horizontalLayout = QtWidgets.QHBoxLayout(self.PersonalInfo)
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.groupBox = QtWidgets.QGroupBox(self.PersonalInfo)
        self.groupBox.setObjectName("groupBox")
        self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.groupBox)
        self.verticalLayout_2.setObjectName("verticalLayout_2")
        self.verticalLayout = QtWidgets.QVBoxLayout()
        self.verticalLayout.setObjectName("verticalLayout")
        self.horizontalLayout_5 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_5.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_5.setObjectName("horizontalLayout_5")
        self.name_label = QtWidgets.QLabel(self.groupBox)
        self.name_label.setObjectName("name_label")
        self.horizontalLayout_5.addWidget(self.name_label)
        self.name_line_edit = QtWidgets.QLineEdit(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(9)
        sizePolicy.setHeightForWidth(self.name_line_edit.sizePolicy().hasHeightForWidth())
        self.name_line_edit.setSizePolicy(sizePolicy)
        self.name_line_edit.setObjectName("name_line_edit")
        self.horizontalLayout_5.addWidget(self.name_line_edit)
        self.horizontalLayout_5.setStretch(0, 3)
        self.horizontalLayout_5.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_5)
        self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_4.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        self.order_label = QtWidgets.QLabel(self.groupBox)
        self.order_label.setObjectName("order_label")
        self.horizontalLayout_4.addWidget(self.order_label)
        self.order_line_edit = QtWidgets.QLineEdit(self.groupBox)
        self.order_line_edit.setObjectName("order_line_edit")
        self.horizontalLayout_4.addWidget(self.order_line_edit)
        self.horizontalLayout_4.setStretch(0, 3)
        self.horizontalLayout_4.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_4)
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_3.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.tele_label = QtWidgets.QLabel(self.groupBox)
        self.tele_label.setObjectName("tele_label")
        self.horizontalLayout_3.addWidget(self.tele_label)
        self.tele_line_edit = QtWidgets.QLineEdit(self.groupBox)
        self.tele_line_edit.setObjectName("tele_line_edit")
        self.horizontalLayout_3.addWidget(self.tele_line_edit)
        self.horizontalLayout_3.setStretch(0, 3)
        self.horizontalLayout_3.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_3)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.address_label = QtWidgets.QLabel(self.groupBox)
        self.address_label.setObjectName("address_label")
        self.horizontalLayout_2.addWidget(self.address_label)
        self.address_line_edit = QtWidgets.QLineEdit(self.groupBox)
        self.address_line_edit.setObjectName("address_line_edit")
        self.horizontalLayout_2.addWidget(self.address_line_edit)
        self.horizontalLayout_2.setStretch(0, 3)
        self.horizontalLayout_2.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        self.verticalLayout_2.addLayout(self.verticalLayout)
        self.horizontalLayout_6 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_6.setObjectName("horizontalLayout_6")
        self.save_pushButton = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.save_pushButton.sizePolicy().hasHeightForWidth())
        self.save_pushButton.setSizePolicy(sizePolicy)
        self.save_pushButton.setObjectName("save_pushButton")
        self.horizontalLayout_6.addWidget(self.save_pushButton)
        self.back_pushButton = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.back_pushButton.sizePolicy().hasHeightForWidth())
        self.back_pushButton.setSizePolicy(sizePolicy)
        self.back_pushButton.setObjectName("back_pushButton")
        self.horizontalLayout_6.addWidget(self.back_pushButton)
        self.verticalLayout_2.addLayout(self.horizontalLayout_6)
        self.horizontalLayout.addWidget(self.groupBox)
        # 返回按钮
        self.back_pushButton.clicked.connect(self.PersonalInfo.close)
        # 保存按钮
        self.save_pushButton.clicked.connect(lambda : self.fun())
        self.retranslateUi()
        QtCore.QMetaObject.connectSlotsByName(self.PersonalInfo)

    def fun(self):
        self.PersonalInfo.hide()
        dialog2 = QtWidgets.QDialog()
        personalPage2 = PersonalInfo2()
        personalPage2.setupUi(dialog2)
        dialog2.show()
        dialog2.exec_()
        # self.PersonalInfo.show()

    def retranslateUi(self):
        _translate = QtCore.QCoreApplication.translate
        self.PersonalInfo.setWindowTitle(_translate("PersonalInfo", "Form"))
        self.groupBox.setTitle(_translate("PersonalInfo", "个人主页1"))
        self.name_label.setToolTip(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:12pt;\">姓名</span></p></body></html>"))
        self.name_label.setText(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:14pt;\">姓名</span></p></body></html>"))
        self.order_label.setText(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:14pt;\">编号</span></p></body></html>"))
        self.tele_label.setText(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:14pt;\">联系方式</span></p></body></html>"))
        self.address_label.setText(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:14pt;\">地址</span></p></body></html>"))
        self.save_pushButton.setText(_translate("PersonalInfo", "保存信息"))
        self.back_pushButton.setText(_translate("PersonalInfo", "返回"))

PersonalInfo2.py文件：

# -*- coding: utf-8 -*-

# Created by: PyQt5 UI code generator 5.13.0
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtWidgets import QApplication,QMainWindow,QDialog


class PersonalInfo(object):
    def __init__(self):
        pass
        # if parent_window:
        #     parent_window.destroy()  # 销毁主界面
        # app = QtWidgets.QApplication(sys.argv)
        # widget = QtWidgets.QDialog()
        # self.PersonalInfo = None
        # self.setupUi(widget)
        # widget.show()
        # sys.exit(app.exec_())

    def setupUi(self, PersonalInfo):
        self.PersonalInfo = PersonalInfo
        self.PersonalInfo.setObjectName("PersonalInfo")
        self.PersonalInfo.resize(550, 564)
        self.horizontalLayout = QtWidgets.QHBoxLayout(self.PersonalInfo)
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.groupBox = QtWidgets.QGroupBox(self.PersonalInfo)
        self.groupBox.setObjectName("groupBox")
        self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.groupBox)
        self.verticalLayout_2.setObjectName("verticalLayout_2")
        self.verticalLayout = QtWidgets.QVBoxLayout()
        self.verticalLayout.setObjectName("verticalLayout")
        self.horizontalLayout_5 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_5.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_5.setObjectName("horizontalLayout_5")
        self.name_label = QtWidgets.QLabel(self.groupBox)
        self.name_label.setObjectName("name_label")
        self.horizontalLayout_5.addWidget(self.name_label)
        self.name_line_edit = QtWidgets.QLineEdit(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(9)
        sizePolicy.setHeightForWidth(self.name_line_edit.sizePolicy().hasHeightForWidth())
        self.name_line_edit.setSizePolicy(sizePolicy)
        self.name_line_edit.setObjectName("name_line_edit")
        self.horizontalLayout_5.addWidget(self.name_line_edit)
        self.horizontalLayout_5.setStretch(0, 3)
        self.horizontalLayout_5.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_5)
        self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_4.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        self.order_label = QtWidgets.QLabel(self.groupBox)
        self.order_label.setObjectName("order_label")
        self.horizontalLayout_4.addWidget(self.order_label)
        self.order_line_edit = QtWidgets.QLineEdit(self.groupBox)
        self.order_line_edit.setObjectName("order_line_edit")
        self.horizontalLayout_4.addWidget(self.order_line_edit)
        self.horizontalLayout_4.setStretch(0, 3)
        self.horizontalLayout_4.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_4)
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_3.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        self.tele_label = QtWidgets.QLabel(self.groupBox)
        self.tele_label.setObjectName("tele_label")
        self.horizontalLayout_3.addWidget(self.tele_label)
        self.tele_line_edit = QtWidgets.QLineEdit(self.groupBox)
        self.tele_line_edit.setObjectName("tele_line_edit")
        self.horizontalLayout_3.addWidget(self.tele_line_edit)
        self.horizontalLayout_3.setStretch(0, 3)
        self.horizontalLayout_3.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_3)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setContentsMargins(110, 10, 110, 10)
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.address_label = QtWidgets.QLabel(self.groupBox)
        self.address_label.setObjectName("address_label")
        self.horizontalLayout_2.addWidget(self.address_label)
        self.address_line_edit = QtWidgets.QLineEdit(self.groupBox)
        self.address_line_edit.setObjectName("address_line_edit")
        self.horizontalLayout_2.addWidget(self.address_line_edit)
        self.horizontalLayout_2.setStretch(0, 3)
        self.horizontalLayout_2.setStretch(1, 7)
        self.verticalLayout.addLayout(self.horizontalLayout_2)
        self.verticalLayout_2.addLayout(self.verticalLayout)
        self.horizontalLayout_6 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_6.setObjectName("horizontalLayout_6")
        self.save_pushButton = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.save_pushButton.sizePolicy().hasHeightForWidth())
        self.save_pushButton.setSizePolicy(sizePolicy)
        self.save_pushButton.setObjectName("save_pushButton")
        self.horizontalLayout_6.addWidget(self.save_pushButton)
        self.back_pushButton = QtWidgets.QPushButton(self.groupBox)
        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Fixed, QtWidgets.QSizePolicy.Fixed)
        sizePolicy.setHorizontalStretch(0)
        sizePolicy.setVerticalStretch(0)
        sizePolicy.setHeightForWidth(self.back_pushButton.sizePolicy().hasHeightForWidth())
        self.back_pushButton.setSizePolicy(sizePolicy)
        self.back_pushButton.setObjectName("back_pushButton")
        self.horizontalLayout_6.addWidget(self.back_pushButton)
        self.verticalLayout_2.addLayout(self.horizontalLayout_6)
        self.horizontalLayout.addWidget(self.groupBox)
        # 返回按钮
        self.back_pushButton.clicked.connect(self.PersonalInfo.close)
        
        self.retranslateUi()
        QtCore.QMetaObject.connectSlotsByName(self.PersonalInfo)

    def retranslateUi(self):
        _translate = QtCore.QCoreApplication.translate
        self.PersonalInfo.setWindowTitle(_translate("PersonalInfo", "Form"))
        self.groupBox.setTitle(_translate("PersonalInfo", "个人主页2"))
        self.name_label.setToolTip(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:12pt;\">姓名</span></p></body></html>"))
        self.name_label.setText(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:14pt;\">姓名</span></p></body></html>"))
        self.order_label.setText(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:14pt;\">编号</span></p></body></html>"))
        self.tele_label.setText(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:14pt;\">联系方式</span></p></body></html>"))
        self.address_label.setText(_translate("PersonalInfo", "<html><head/><body><p><span style=\" font-size:14pt;\">地址</span></p></body></html>"))
        self.save_pushButton.setText(_translate("PersonalInfo", "保存信息"))
        self.back_pushButton.setText(_translate("PersonalInfo", "返回"))

这里说一句，如果我想从个人界面2返回之后直接到管理员界面，而不经过个人界面1该怎么弄呢？
那就将AdminPage类的这两行注释掉就行了：

好啦，总结完毕~