python+pyqt5实现KFC点餐收银系统

Python学习交流 · 公众号 · Python · 2019-05-02 19:16

正文

这个kfc收银系统我实现了的以下功能：

1.正常餐品结算和找零。
2.基本套餐结算和找零。
3.使用优惠劵购买餐品结算和找零。
4.可在一定时间段参与店内活动
5.模拟打印小票的功能（写到文件中）。

工程文件：

肯德基.py文件实现各功能、kfctip.txt文件用于打印小票、picture文件里存放界面所需的图片、其他四个文件为各界面布局。
主界面：

正常餐品点餐界面：

套餐点餐界面：

活动套餐点餐界面：

当点击第二个活动套餐时：

加入订单点击返回后主界面会生成订单信息：

点击结算：

以下是代码实现：
界面布局均使用pyqt5
主界面布局：

from PyQt5 import QtCore, QtWidgets
class Ui_MainWindow(object):    def setupUi(self, MainWindow):        MainWindow.setObjectName("MainWindow")        MainWindow.resize(893, 489)        self.centralwidget = QtWidgets.QWidget(MainWindow)        self.centralwidget.setObjectName("centralwidget")        self.pushButton_2 = QtWidgets.QPushButton(self.centralwidget)        self.pushButton_2.setGeometry(QtCore.QRect(510, 20, 101, 41))        self.pushButton_2.setObjectName("pushButton_2")        self.pushButton_3 = QtWidgets.QPushButton(self.centralwidget)        self.pushButton_3.setGeometry(QtCore.QRect(510, 80, 101, 41))        self.pushButton_3.setObjectName("pushButton_3")        self.pushButton_4 = QtWidgets.QPushButton(self.centralwidget)        self.pushButton_4.setGeometry(QtCore.QRect(510, 140, 101, 41))        self.pushButton_4.setObjectName("pushButton_4")        self.label = QtWidgets.QLabel(self.centralwidget)        self.label.setGeometry(QtCore.QRect(510, 200, 111, 21))        self




    
.label.setObjectName("label")        self.label_2 = QtWidgets.QLabel(self.centralwidget)        self.label_2.setGeometry(QtCore.QRect(510, 230, 72, 15))        self.label_2.setObjectName("label_2")        self.label_3 = QtWidgets.QLabel(self.centralwidget)        self.label_3.setGeometry(QtCore.QRect(590, 230, 21, 16))        self.label_3.setObjectName("label_3")        self.label_4 = QtWidgets.QLabel(self.centralwidget)        self.label_4.setGeometry(QtCore.QRect(510, 260, 81, 21))        self.label_4.setObjectName("label_4")        self.label_5 = QtWidgets.QLabel(self.centralwidget)        self.label_5.setGeometry(QtCore.QRect(510, 290, 72, 15))        self.label_5.setObjectName("label_5")        self.label_6 = QtWidgets.QLabel(self.centralwidget)        self.label_6.setGeometry(QtCore.QRect(590, 290, 21, 16))        self.label_6.setObjectName("label_6")        self.label_7 = QtWidgets.QLabel(self.centralwidget)        self.label_7.setGeometry(QtCore.QRect(640, 20, 61, 21))        self.label_7.setObjectName("label_7")        self.tableWidget = QtWidgets.QTableWidget(self.centralwidget)        self.tableWidget.setGeometry(QtCore.QRect(640, 40, 241, 231))        self.tableWidget.setObjectName("tableWidget")        self.tableWidget.setColumnCount(3)        self.tableWidget.setRowCount(0)        item = QtWidgets.QTableWidgetItem()        self.tableWidget.setHorizontalHeaderItem(0, item)        item = QtWidgets.QTableWidgetItem()        self.tableWidget.setHorizontalHeaderItem(1, item)        item = QtWidgets.QTableWidgetItem()        self.tableWidget.setHorizontalHeaderItem(2, item)        self.tableWidget.horizontalHeader().setDefaultSectionSize(70)        self.pushButton_5 = QtWidgets.QPushButton(self.centralwidget)        self.pushButton_5.setGeometry(QtCore.QRect(640, 290, 71, 31))        self.pushButton_5.setObjectName("pushButton_5")        self.pushButton_6 = QtWidgets.QPushButton(self.centralwidget)        self.pushButton_6.setGeometry(QtCore.QRect(640, 350, 91, 31))        self.pushButton_6.setObjectName("pushButton_6")        self.pushButton_7 = QtWidgets.QPushButton(self.centralwidget)        self.pushButton_7.setGeometry(QtCore.QRect(750, 350, 91, 31))        self.pushButton_7.setObjectName("pushButton_7")        self.label_8 = QtWidgets.QLabel(self.centralwidget)        self.label_8.setGeometry(QtCore.QRect(10, 10, 481, 431))        self.label_8.setObjectName("label_8")        MainWindow.setCentralWidget(self.centralwidget)        self.menubar = QtWidgets.QMenuBar(MainWindow)        self.menubar.setGeometry(QtCore.QRect(0, 0, 893, 26))        self.menubar.setObjectName("menubar")        MainWindow.setMenuBar(self.menubar)        self.statusbar = QtWidgets.QStatusBar(MainWindow)        self.statusbar.setObjectName("statusbar")        MainWindow.setStatusBar(self.statusbar)
        self.retranslateUi(MainWindow)        QtCore.QMetaObject.connectSlotsByName(MainWindow)
    def retranslateUi(self, MainWindow):        _translate = QtCore.QCoreApplication.translate        MainWindow.setWindowTitle(_translate("MainWindow", "肯德基"))        self.pushButton_2.setText(_translate("MainWindow", "基本餐"))        self.pushButton_3.setText(_translate("MainWindow", "套餐"))        self.pushButton_4.setText(_translate("MainWindow", "活动"))        self.label.setText(_translate("MainWindow", "会员储值卡余额"))        self.label_2.setText(_translate("MainWindow", "钱"))        self.label_3.setText(_translate("MainWindow", "元"))        self.label_4.setText(_translate("MainWindow", "您的优惠券"))        self.label_5.setText(_translate("MainWindow", "券"))        self.label_6.setText(_translate("MainWindow", "张"))        self.label_7.setText(_translate("MainWindow", "您的订单"))        item = self.tableWidget.horizontalHeaderItem(0)        item.setText(_translate("MainWindow", "名称"))        item = self.tableWidget.horizontalHeaderItem(1)        item.setText(_translate("MainWindow", "数量"))        item = self.tableWidget.horizontalHeaderItem(2)        item.setText(_translate("MainWindow", "价格/元"))        self.pushButton_5.setText(_translate("MainWindow", "删除"))        self.pushButton_6.setText(_translate("MainWindow", "结算"))        self.pushButton_7.setText(_translate("MainWindow", "打印小票"))        self.label_8.setText(_translate("MainWindow", "图"))

正常套餐界面：

from PyQt5 import QtCore, QtWidgets




    

class Ui_Normal(object):    def setupUi(self, Form):        Form.setObjectName("Form")        Form.resize(728, 459)        self.pushButton = QtWidgets.QPushButton(Form)        self.pushButton.setGeometry(QtCore.QRect(40, 190, 93, 41))        self.pushButton.setObjectName("pushButton")        self.pushButton_2 = QtWidgets.QPushButton(Form)        self.pushButton_2.setGeometry(QtCore.QRect(260, 190, 93, 41))        self.pushButton_2.setObjectName("pushButton_2")        self.pushButton_3 = QtWidgets.QPushButton(Form)        self.pushButton_3.setGeometry(QtCore.QRect(480, 190, 93, 41))        self.pushButton_3.setObjectName("pushButton_3")        self.pushButton_4 = QtWidgets.QPushButton(Form)        self.pushButton_4.setGeometry(QtCore.QRect(40, 400, 93, 41))        self.pushButton_4.setObjectName("pushButton_4")        self.pushButton_5 = QtWidgets.QPushButton(Form)        self.pushButton_5.setGeometry(QtCore.QRect(620, 400, 93, 41))        self.pushButton_5.setObjectName("pushButton_5")        self.pushButton_6 = QtWidgets.QPushButton(Form)        self.pushButton_6.setGeometry(QtCore.QRect(260, 400, 93, 41))        self.pushButton_6.setObjectName("pushButton_6")        self.label = QtWidgets.QLabel(Form)        self.label.setGeometry(QtCore.QRect(50, 170, 72, 15))        self.label.setObjectName("label")        self.label_2 = QtWidgets.QLabel(Form)        self.label_2.setGeometry(QtCore.QRect(30, 140, 121, 21))        self.label_2.setObjectName("label_2")        self.label_3 = QtWidgets.QLabel(Form)        self.label_3.setGeometry(QtCore.QRect(30, 10, 121, 111))        self.label_3.setObjectName("label_3")        self.label_4 = QtWidgets.QLabel(Form)        self.label_4.setGeometry(QtCore.QRect(270, 170, 72, 15))        self.label_4.setObjectName("label_4")        self.label_5 = QtWidgets.QLabel(Form)        self.label_5.setGeometry(QtCore.QRect(270, 140, 72, 15))        self.label_5.setObjectName("label_5")        self.label_6 = QtWidgets.QLabel(Form)        self.label_6.setGeometry(QtCore.QRect(240, 10, 131, 111))        self.label_6.setObjectName("label_6")        self.label_7 = QtWidgets.QLabel(Form)        self.label_7.setGeometry(QtCore.QRect(490, 170, 72, 15))        self.label_7.setObjectName("label_7")        self.label_8 = QtWidgets.QLabel(Form)        self.label_8.setGeometry(QtCore.QRect(480, 140, 91, 16))        self.label_8.setObjectName("label_8")        self.label_9 = QtWidgets.QLabel(Form)        self.label_9.setGeometry(QtCore.QRect(460, 10, 131, 111))        self.label_9.setObjectName("label_9")        self.label_10 = QtWidgets.QLabel(Form)        self.label_10.setGeometry(QtCore.QRect(50, 380, 72, 15))        self.label_10.setObjectName("label_10")        self.label_11 = QtWidgets.QLabel(Form)        self.label_11.setGeometry(QtCore.QRect(60, 360, 51, 16))        self.label_11.setObjectName("label_11")        self.label_12 = QtWidgets.QLabel(Form)        self.label_12.setGeometry(QtCore.QRect(30, 250, 121, 101))        self.label_12.setObjectName("label_12")        self.label_13 = QtWidgets.QLabel(Form)        self.label_13.setGeometry(QtCore.QRect(270, 380, 72, 15))        self.label_13.setObjectName("label_13")        self.label_14 = QtWidgets.QLabel(Form)        self.label_14.setGeometry(QtCore.QRect(250, 360, 131, 16))        self.label_14.setObjectName("label_14")        self.label_15 = QtWidgets.QLabel(Form)        self.label_15.setGeometry(QtCore.QRect(240, 250, 131, 101))        self.label_15.setObjectName("label_15")
        self.retranslateUi(Form)        QtCore.QMetaObject.connectSlotsByName(Form)
    def retranslateUi(self, Form):        _translate = QtCore.QCoreApplication.translate        Form.setWindowTitle(_translate("Form", "Form"))        self.pushButton.setText(_translate("Form", "加入订单"))        self.pushButton_2.setText(_translate("Form", "加入订单"))        self.pushButton_3.setText(_translate("Form", "加入订单"))        self.pushButton_4.setText(_translate("Form", "加入订单"))        self.pushButton_5.setText(_translate("Form", "返回"))        self.pushButton_6.setText(_translate("Form", "加入订单"))        self.label.setText(_translate("Form", "钱1"))        self.label_2.setText(_translate("Form", "新奥尔良烤鸡腿堡"))        self.label_3.setText(_translate("Form", "TextLabel"))        self.label_4.setText(_translate("Form", "钱2"))        self.label_5.setText(_translate("Form", "香辣鸡翅"




    
))        self.label_6.setText(_translate("Form", "TextLabel"))        self.label_7.setText(_translate("Form", "钱3"))        self.label_8.setText(_translate("Form", "波纹霸王薯条"))        self.label_9.setText(_translate("Form", "TextLabel"))        self.label_10.setText(_translate("Form", "钱4"))        self.label_11.setText(_translate("Form", "乌龙茶"))        self.label_12.setText(_translate("Form", "TextLabel"))        self.label_13.setText(_translate("Form", "钱5"))        self.label_14.setText(_translate("Form", "原味圣代（草莓酱）"))        self.label_15.setText(_translate("Form", "TextLabel"))

套餐界面：

from PyQt5 import QtCore, QtWidgets
class Ui_Package(object):    def setupUi(self, Form):        Form.setObjectName("Form")        Form.resize(728, 393)        self.pushButton = QtWidgets.QPushButton(Form)        self.pushButton.setGeometry(QtCore.QRect(90, 280, 91, 31))        self.pushButton.setObjectName("pushButton")        self.pushButton_2 = QtWidgets.QPushButton(Form)        self.pushButton_2.setGeometry(QtCore.QRect(340, 280, 93, 31))        self.pushButton_2.setObjectName("pushButton_2")        self.label = QtWidgets.QLabel(Form)        self.label.setGeometry(QtCore.QRect(100, 250, 72, 15))        self.label.setObjectName("label")        self.label_2 = QtWidgets.QLabel(Form)        self.label_2.setGeometry(QtCore.QRect(350, 250, 72, 15))        self.label_2.setObjectName("label_2")        self.label_3 = QtWidgets.QLabel(Form)        self.label_3.setGeometry(QtCore.QRect(80, 220, 131, 21))        self.label_3.setObjectName("label_3")        self.label_4 = QtWidgets.QLabel(Form)        self.label_4.setGeometry(QtCore.QRect(330, 220, 111, 21))        self.label_4.setObjectName("label_4")        self.label_5 = QtWidgets.QLabel(Form)        self.label_5.setGeometry(QtCore.QRect(60, 20, 161, 171))        self.label_5.setObjectName("label_5")        self.label_6 = QtWidgets.QLabel(Form)        self.label_6.setGeometry(QtCore.QRect(300, 20, 171, 171))        self.label_6.setObjectName("label_6")        self.pushButton_3 = QtWidgets.QPushButton(Form)        self.pushButton_3.setGeometry(QtCore.QRect(560, 280, 101, 41))        self.pushButton_3.setObjectName("pushButton_3")
        self.retranslateUi(Form)        QtCore.QMetaObject.connectSlotsByName(Form)
    def retranslateUi(self, Form):        _translate = QtCore.QCoreApplication.translate        Form.setWindowTitle(_translate("Form", "Form"))        self.pushButton.setText(_translate("Form", "加入订单"))        self.pushButton_2.setText(_translate("Form", "加入订单"))        self.label.setText(_translate("Form", "钱1"))        self.label_2.setText(_translate("Form", "钱2"))        self.label_3.setText(_translate("Form", "翅桶辣堡奥堡套餐"))        self.label_4.setText(_translate("Form", "万圣节日劲堡桶"))        self.label_5.setText(_translate("Form", "TextLabel"))        self.label_6.setText(_translate("Form", "TextLabel"))        self.pushButton_3.setText(_translate("Form", "返回"))

活动界面：

from PyQt5 import QtCore, QtWidgets
class Ui_Activity(object):    def setupUi(self, Form):        Form.setObjectName("Form")        Form.resize(639, 335)        self.pushButton = QtWidgets.QPushButton(Form)        self.pushButton.setGeometry(QtCore.QRect(50, 240, 93, 31))        self.pushButton.setObjectName("pushButton")        self.pushButton_2 = QtWidgets.QPushButton(Form)        self.pushButton_2.setGeometry(QtCore.QRect(300, 240, 93, 31))        self.pushButton_2.setObjectName("pushButton_2")        self.label = QtWidgets.QLabel(Form)        self.label.setGeometry(QtCore.QRect(11, 220, 201, 20))        self




    
.label.setObjectName("label")        self.label_2 = QtWidgets.QLabel(Form)        self.label_2.setGeometry(QtCore.QRect(20, 200, 161, 16))        self.label_2.setObjectName("label_2")        self.label_3 = QtWidgets.QLabel(Form)        self.label_3.setGeometry(QtCore.QRect(50, 180, 91, 16))        self.label_3.setObjectName("label_3")        self.label_4 = QtWidgets.QLabel(Form)        self.label_4.setGeometry(QtCore.QRect(30, 30, 141, 141))        self.label_4.setObjectName("label_4")        self.label_5 = QtWidgets.QLabel(Form)        self.label_5.setGeometry(QtCore.QRect(261, 220, 201, 20))        self.label_5.setObjectName("label_5")        self.label_6 = QtWidgets.QLabel(Form)        self.label_6.setGeometry(QtCore.QRect(270, 200, 161, 16))        self.label_6.setObjectName("label_6")        self.label_7 = QtWidgets.QLabel(Form)        self.label_7.setGeometry(QtCore.QRect(310, 180, 61, 16))        self.label_7.setObjectName("label_7")        self.label_8 = QtWidgets.QLabel(Form)        self.label_8.setGeometry(QtCore.QRect(280, 30, 151, 141))        self.label_8.setObjectName("label_8")        self.pushButton_3 = QtWidgets.QPushButton(Form)        self.pushButton_3.setGeometry(QtCore.QRect(490, 250, 101, 31))        self.pushButton_3.setObjectName("pushButton_3")
        self.retranslateUi(Form)        QtCore.QMetaObject.connectSlotsByName(Form)
    def retranslateUi(self, Form):        _translate = QtCore.QCoreApplication.translate        Form.setWindowTitle(_translate("Form", "Form"))        self.pushButton.setText(_translate("Form", "加入订单"))        self.pushButton_2.setText(_translate("Form", "加入订单"))        self.label.setText(_translate("Form", "钱1"))        self.label_2.setText(_translate("Form", "2018.10.1-2018.10.31"))        self.label_3.setText(_translate("Form", "葡式蛋挞5只"))        self.label_4.setText(_translate("Form", "TextLabel"))        self.label_5.setText(_translate("Form", "钱2"))        self.label_6.setText(_translate("Form", "2018.11.1-2018.11.11"))        self.label_7.setText(_translate("Form", "超级翅桶"))        self.label_8.setText(_translate("Form", "TextLabel"))        self.pushButton_3.setText(_translate("Form", "返回"))

以下为实现各界面互联和各功能的实现（注释比较详细这里就不多说了）：

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




    
# 作者：dcjmessi# 日期：2018/10/19

from kfcmain import *from normal import *from package import *from activity import *import sysfrom PyQt5.QtWidgets import *from PyQt5.QtGui import QPixmap
class KFC_Main(QMainWindow):    def __init__(self):        QMainWindow.__init__(self)        self.main_ui = Ui_MainWindow()        self.main_ui.setupUi(self)
        # 给按钮绑定方法        btn_del = self.main_ui.pushButton_5        btn_del.clicked.connect(self.order_del)        btn_num = self.main_ui.pushButton_6        btn_num.clicked.connect(self.order_num)        self.btn_tip = self.main_ui.pushButton_7        self.btn_tip.clicked.connect(self.order_tip)        # 设置按钮为当前不可用        self.btn_tip.setEnabled(False)        # 定义列表        self.num = []        self.new_num = []
    # 主界面显示    def person(self):        # 主界面贴图        self.main_ui.label_8.setPixmap(QPixmap('./picture/主界图.png'))        # 将图片完全填充        self.main_ui.label_8.setScaledContents(True)        # 初始化会员储值余额        self.balance = 200        # 初始化优惠券数量        self.coupons = 1        # 显示余额和券数量        self.main_ui.label_2.setText(str(self.balance))        self.main_ui.label_5.setText(str(self.coupons))        # 显示主界面        kfcmain.show()
    # 删除tableWidget所选行    def order_del(self):        # 获取所选行索引        row_index = kfcmain.main_ui.tableWidget.currentRow()        if row_index != -1:            # 删除            kfcmain.main_ui.tableWidget.removeRow(row_index)
    # 结算    def order_num(self):        # 设置按钮为可用        self.btn_tip.setEnabled(True)        # 遍历所有行        for row_index in range(kfcmain.main_ui.tableWidget.rowCount()):            # 将每一行的第三项值添加到num列表里            self.num.append(kfcmain.main_ui.tableWidget.item(row_index, 2).text())
        # 将num中的字符转换成int型        self.new_num = eval('[' + (','.join(self.num)) + ']')        # 将new_num列表值求和        self.money = sum(self.new_num)
        # 有优惠券时        if self.coupons >= 1:            # 消息提示框            button = QMessageBox.information(self, "温馨提示", "是否使用优惠券", QMessageBox.Yes | QMessageBox.No)            # 使用优惠券            if button == QMessageBox.Yes:                # 当前优惠券数量减一                self.coupons = self.coupons -1                self.main_ui.label_5.setText(str(self.coupons))
                # 余额足够                if self.balance >= (self.money - self.coupons * 20):                    QMessageBox.information(self, "恭喜您", "付款成功！", QMessageBox.Yes)                    self.balance = self.balance - self.money - self.coupons * 20                    self.main_ui.label_2.setText(str(self.balance))                else:                    QMessageBox.information(self, "对不起", "您的会员储值卡余额不足！", QMessageBox.Yes)            # 不使用优惠券            else:                if self.balance >= self.money:                    QMessageBox.information(self, "恭喜您", "付款成功！", QMessageBox.Yes)                    self.balance = self.balance - self.money                    self.main_ui.label_2.setText(str(self.balance))                else:                    QMessageBox.information(self, "对不起", "您的会员储值卡余额不足！", QMessageBox.Yes)        # 没有优惠券时        else:            if self.balance >= self.money:                QMessageBox.information(self, "恭喜您", "付款成功！", QMessageBox.Yes)                self.balance = self.balance - self.money                self.main_ui.label_2.setText(str(self.balance))            else:                QMessageBox.information(self, "对不起", "您的会员储值卡余额不足！", QMessageBox.Yes)
    # 打印小票    def order_tip(self):        # 打开本地txt文件        with open("kfctip.txt", "w") as f:            # 遍历行            for row_index in range(kfcmain.main_ui.tableWidget.rowCount()):                # 遍历列                for column_index in range(kfcmain.main_ui.tableWidget.columnCount()):                    # 将tableWidget数据写入文件                    f.write(kfcmain.main_ui.tableWidget.item(row_index, column_index).text() + "\n")            f.write("合计：" + str(self.money) + "元")        f.close()
class Normal(QWidget):    def __init__(self):        QWidget.__init__(self)        self.normal_ui = Ui_Normal()        self.normal_ui.setupUi(self)
        # 初始化各基本餐加入订单按钮点击次数        self.bt1 = 0        self.bt2 = 0        self.bt3 = 0        self.bt4 = 0        self.bt6 = 0        # 初始化返回按钮点击次数        self.bt5 = 0        # 按钮绑定方法        btn_hamburg = self.normal_ui.pushButton        btn_hamburg.clicked.connect(self.order_hamburg)        btn_chicken = self.normal_ui.pushButton_2        btn_chicken.clicked.connect(self.order_chicken)        btn_fries = self.normal_ui.pushButton_3        btn_fries.clicked.connect(self.order_fries)        btn_tea = self.normal_ui.pushButton_4        btn_tea.clicked.connect(self.order_tea)        btn_ice = self.normal_ui.pushButton_6        btn_ice.clicked.connect(self.order_ice)        btn_return = self.normal_ui.pushButton_5        btn_return.clicked.connect(self.nor_show)
    # 显示基本餐界面    def nor_order(self):        self.normal_ui.label_3.setPixmap(QPixmap('./picture/新奥尔良.png'))        self.normal_ui.label_3.setScaledContents(True)        self.normal_ui.label_6.setPixmap(QPixmap('./picture/鸡翅.png'))        self.normal_ui.label_6.setScaledContents(True)        self.normal_ui.label_9.setPixmap(QPixmap('./picture/薯条.png'))        self.normal_ui.label_9.setScaledContents(True)        self.normal_ui.label_12.setPixmap(QPixmap('./picture/乌龙茶.png'))        self.normal_ui.label_12.setScaledContents(True)        self.normal_ui.label_15.setPixmap(QPixmap('./picture/冰淇淋.png'))        self.normal_ui.label_15.setScaledContents(True)        # 基本餐价格        self.price_hamburg = 18.5        self.price_chicken = 11.0        self.price_fries = 13.0        self.price_tea = 13.5        self.price_ice = 10.0        # 显示价格        self.normal_ui.label.setText(str(self.price_hamburg)+"元/份")        self.normal_ui.label_4.setText(str(self.price_chicken)+"元/份")        self.normal_ui.label_7.setText(str(self.price_fries)+"元/份")        self.normal_ui.label_10.setText(str(self.price_tea)+"元/份")        self.normal_ui.label_13.setText(str(self.price_ice)+"元/份")        normal.show()
    # 计算点击次数    def order_hamburg(self):        self.bt1 += 1
    def order_chicken(self):        self.bt2 += 1
    def order_fries(self):        self.bt3 += 1
    def order_tea(self):        self.bt4 += 1
    def order_ice(self):        self.bt6 += 1
    def nor_show(self):        self.bt5 += 1
        # 隐藏界面        normal.hide()
        # 获取所选各基本餐的数量对应的价格        self.num_hamburg = self.price_hamburg * self.bt1        self.num_chicken = self.price_chicken * self.bt2        self.num_fries = self.price_fries * self.bt3        self.num_tea = self.price_tea * self.bt4        self.num_ice = self.price_ice * self.bt6
        # 不是第一次进入该界面        if self.bt5 > 1:            for row_index in range(kfcmain.main_ui.tableWidget.rowCount()):                # 获取tableWidget的所有名称，并放入name列表                name.append(kfcmain.main_ui.tableWidget.item(row_index, 0).text())            if '新奥尔良烤鸡腿堡' in name:                # 重新设置该行的数量和价格                kfcmain.main_ui.tableWidget.setItem(name.index('新奥尔良烤鸡腿堡'), 1, QTableWidgetItem("×" + str(self.bt1)))                kfcmain.main_ui.tableWidget.setItem(name.index('新奥尔良烤鸡腿堡'), 2, QTableWidgetItem(str(self.num_hamburg)))            if '新奥尔良烤鸡腿堡' not in name:                # 已选择                if

python+pyqt5实现KFC点餐收银系统

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