python+pyqt5实现KFC点餐收银系统

本文实例为大家分享了python实现kfc点餐收银系统的具体代码，供大家参考，具体内容如下

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：

打印小票到文件：

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 sys
from 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 self.bt1 != 0:
   # 添加一行数据
   row_count = kfcmain.main_ui.tablewidget.rowcount()
   kfcmain.main_ui.tablewidget.insertrow(row_count)
   kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(normal.normal_ui.label_2.text()))
   kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt1)))
   kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_hamburg)))
  if '香辣鸡翅' in name:
  kfcmain.main_ui.tablewidget.setitem(name.index('香辣鸡翅'), 1, qtablewidgetitem("×" + str(self.bt2)))
  kfcmain.main_ui.tablewidget.setitem(name.index('香辣鸡翅'), 2, qtablewidgetitem(str(self.num_chicken)))
  if '香辣鸡翅' not in name:
  if self.bt2 != 0:
   row_count = kfcmain.main_ui.tablewidget.rowcount()
   kfcmain.main_ui.tablewidget.insertrow(row_count)
   kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(normal.normal_ui.label_5.text()))
   kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt2)))
   kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_chicken)))
  if '波纹霸王薯条' in name:
  kfcmain.main_ui.tablewidget.setitem(name.index('波纹霸王薯条'), 1, qtablewidgetitem("×" + str(self.bt3)))
  kfcmain.main_ui.tablewidget.setitem(name.index('波纹霸王薯条'), 2, qtablewidgetitem(str(self.num_fries)))
  if '波纹霸王薯条' not in name:
  if self.bt3 != 0:
   row_count = kfcmain.main_ui.tablewidget.rowcount()
   kfcmain.main_ui.tablewidget.insertrow(row_count)
   kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(normal.normal_ui.label_8.text()))
   kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt3)))
   kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_fries)))
  if '乌龙茶'in name:
  kfcmain.main_ui.tablewidget.setitem(name.index('乌龙茶'), 1, qtablewidgetitem("×" + str(self.bt4)))
  kfcmain.main_ui.tablewidget.setitem(name.index('乌龙茶'), 2, qtablewidgetitem(str(self.num_tea)))
  if '乌龙茶' not in name:
  if self.bt4 != 0:
   row_count = kfcmain.main_ui.tablewidget.rowcount()
   kfcmain.main_ui.tablewidget.insertrow(row_count)
   kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(normal.normal_ui.label_11.text()))
   kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt4)))
   kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_tea)))
  if '原味圣代（草莓酱）' in name:
  kfcmain.main_ui.tablewidget.setitem(name.index('原味圣代（草莓酱）'), 1, qtablewidgetitem("×" + str(self.bt6)))
  kfcmain.main_ui.tablewidget.setitem(name.index('原味圣代（草莓酱）'), 2, qtablewidgetitem(str(self.num_ice)))
  if '原味圣代（草莓酱）' not in name:
  if self.bt6 != 0:
   row_count = kfcmain.main_ui.tablewidget.rowcount()
   kfcmain.main_ui.tablewidget.insertrow(row_count)
   kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(normal.normal_ui.label_14.text()))
   kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt6)))
   kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_ice)))
 # 第一次进入该界面
 else:
  if self.bt1 != 0:
  row_count = kfcmain.main_ui.tablewidget.rowcount()
  kfcmain.main_ui.tablewidget.insertrow(row_count)
  kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(normal.normal_ui.label_2.text()))
  kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt1)))
  kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_hamburg)))
  if self.bt2 != 0:
  row_count = kfcmain.main_ui.tablewidget.rowcount()
  kfcmain.main_ui.tablewidget.insertrow(row_count)
  kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(normal.normal_ui.label_5.text()))
  kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt2)))
  kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_chicken)))
  if self.bt3 != 0:
  row_count = kfcmain.main_ui.tablewidget.rowcount()
  kfcmain.main_ui.tablewidget.insertrow(row_count)
  kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(normal.normal_ui.label_8.text()))
  kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt3)))
  kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_fries)))
  if self.bt4 != 0:
  row_count = kfcmain.main_ui.tablewidget.rowcount()
  kfcmain.main_ui.tablewidget.insertrow(row_count)
  kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(normal.normal_ui.label_11.text()))
  kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt4)))
  kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_tea)))
  if self.bt6 != 0:
  row_count = kfcmain.main_ui.tablewidget.rowcount()
  kfcmain.main_ui.tablewidget.insertrow(row_count)
  kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(normal.normal_ui.label_14.text()))
  kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt6)))
  kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_ice)))

class package(qwidget):
 def __init__(self):
 qwidget.__init__(self)
 self.package_ui = ui_package()
 self.package_ui.setupui(self)

 # 初始化各套餐加入订单按钮点击次数
 self.bt1 = 0
 self.bt2 = 0
 # 初始化返回按钮点击次数
 self.bt3 = 0
 # 按钮绑定方法
 btn_pack1 = self.package_ui.pushbutton
 btn_pack1.clicked.connect(self.order_pack1)
 btn_pack2 = self.package_ui.pushbutton_2
 btn_pack2.clicked.connect(self.order_pack2)
 btn_return = self.package_ui.pushbutton_3
 btn_return.clicked.connect(self.pac_show)

 # 显示套餐界面
 def pac_order(self):
 self.package_ui.label_5.setpixmap(qpixmap('./picture/套餐2.png'))
 self.package_ui.label_5.setscaledcontents(true)
 self.package_ui.label_6.setpixmap(qpixmap('./picture/套餐1.png'))
 self.package_ui.label_6.setscaledcontents(true)
 # 套餐价格
 self.price_pack1 = 89.0
 self.price_pack2 = 67.0
 self.package_ui.label.settext(str(self.price_pack1)+"元/份")
 self.package_ui.label_2.settext(str(self.price_pack2)+"元/份")
 package.show()

 def order_pack1(self):
 self.bt1 += 1

 def order_pack2(self):
 self.bt2 += 1

 def pac_show(self):
 self.bt3 += 1

 package.hide()

 self.num_pack1 = self.price_pack1 * self.bt1
 self.num_pack2 = self.price_pack2 * self.bt2

 if self.bt3 > 1:
  for row_index in range(kfcmain.main_ui.tablewidget.rowcount()):
  name.append(kfcmain.main_ui.tablewidget.item(row_index, 0).text())
  if '翅桶辣堡奥堡套餐' in name:
  kfcmain.main_ui.tablewidget.setitem(name.index('翅桶辣堡奥堡套餐'), 1, qtablewidgetitem("×" + str(self.bt1)))
  kfcmain.main_ui.tablewidget.setitem(name.index('翅桶辣堡奥堡套餐'), 2, qtablewidgetitem(str(self.num_pack1)))
  if '翅桶辣堡奥堡套餐' not in name:
  if self.bt1 != 0:
   row_count = kfcmain.main_ui.tablewidget.rowcount()
   kfcmain.main_ui.tablewidget.insertrow(row_count)
   kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(package.package_ui.label_3.text()))
   kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt1)))
   kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_pack1)))
  if '万圣节日劲堡桶' in name:
  kfcmain.main_ui.tablewidget.setitem(name.index('万圣节日劲堡桶'), 1, qtablewidgetitem("×" + str(self.bt2)))
  kfcmain.main_ui.tablewidget.setitem(name.index('万圣节日劲堡桶'), 2, qtablewidgetitem(str(self.num_pack2)))
  if '万圣节日劲堡桶' not in name:
  if self.bt2 != 0:
   row_count = kfcmain.main_ui.tablewidget.rowcount()
   kfcmain.main_ui.tablewidget.insertrow(row_count)
   kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(package.package_ui.label_4.text()))
   kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt2)))
   kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_pack2)))
 else:
  if self.bt1 != 0:
  row_count = kfcmain.main_ui.tablewidget.rowcount()
  kfcmain.main_ui.tablewidget.insertrow(row_count)
  kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(package.package_ui.label_3.text()))
  kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt1)))
  kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_pack1)))
  if self.bt2 != 0:
  row_count = kfcmain.main_ui.tablewidget.rowcount()
  kfcmain.main_ui.tablewidget.insertrow(row_count)
  kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(package.package_ui.label_4.text()))
  kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt2)))
  kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_pack2)))

class activity(qwidget):
 def __init__(self):
 qwidget.__init__(self)
 self.activity_ui = ui_activity()
 self.activity_ui.setupui(self)

 # 初始化各活动加入订单按钮点击次数
 self.bt1 = 0
 # 初始化返回按钮点击次数
 self.bt3 = 0
 # 绑定方法
 btn_act1 = self.activity_ui.pushbutton
 btn_act1.clicked.connect(self.order_act1)
 btn_act2 = self.activity_ui.pushbutton_2
 btn_act2.clicked.connect(self.order_act2)
 btn_return = self.activity_ui.pushbutton_3
 btn_return.clicked.connect(self.act_show)

 def act_order(self):
 self.activity_ui.label_4.setpixmap(qpixmap('./picture/活动1.png'))
 self.activity_ui.label_4.setscaledcontents(true)
 self.activity_ui.label_8.setpixmap(qpixmap('./picture/活动2.png'))
 self.activity_ui.label_8.setscaledcontents(true)
 # 活动价格
 self.price_act1 = 29.0
 self.price_act2 = 69.0
 self.activity_ui.label.settext(str(self.price_act1) + "元/份 原价:"+str(self.price_act1 + 7) + "元/份")
 self.activity_ui.label_5.settext(str(self.price_act2) + "元/份 原价:"+str(self.price_act2 + 10) + "元/份")
 activity.show()

 def order_act1(self):
 self.bt1 += 1

 def order_act2(self):
 qmessagebox.information(self, "对不起", "活动还没有开始，敬请期待！", qmessagebox.yes)

 def act_show(self):
 self.bt3 += 1

 activity.hide()

 self.num_act1 = self.price_act1 * self.bt1

 if self.bt3 > 1:
  for row_index in range(kfcmain.main_ui.tablewidget.rowcount()):
  name.append(kfcmain.main_ui.tablewidget.item(row_index, 0).text())
  if '葡式蛋挞5只' in name:
  kfcmain.main_ui.tablewidget.setitem(name.index('葡式蛋挞5只'), 1, qtablewidgetitem("×" + str(self.bt1)))
  kfcmain.main_ui.tablewidget.setitem(name.index('葡式蛋挞5只'), 2, qtablewidgetitem(str(self.num_act1)))
  if '葡式蛋挞5只' not in name:
  if self.bt1 != 0:
   row_count = kfcmain.main_ui.tablewidget.rowcount()
   kfcmain.main_ui.tablewidget.insertrow(row_count)
   kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(activity.activity_ui.label_3.text()))
   kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt1)))
   kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_act1)))
 else:
  if self.bt1 != 0:
  row_count = kfcmain.main_ui.tablewidget.rowcount()
  kfcmain.main_ui.tablewidget.insertrow(row_count)
  kfcmain.main_ui.tablewidget.setitem(row_count, 0, qtablewidgetitem(activity.activity_ui.label_3.text()))
  kfcmain.main_ui.tablewidget.setitem(row_count, 1, qtablewidgetitem("×" + str(self.bt1)))
  kfcmain.main_ui.tablewidget.setitem(row_count, 2, qtablewidgetitem(str(self.num_act1)))

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

 kfcmain = kfc_main()
 normal = normal()
 package = package()
 activity = activity()
 # 显示主界面
 kfcmain.person()
 # 绑定按钮
 btn_normal = kfcmain.main_ui.pushbutton_2
 btn_normal.clicked.connect(normal.nor_order)
 btn_package = kfcmain.main_ui.pushbutton_3
 btn_package.clicked.connect(package.pac_order)
 btn_activity = kfcmain.main_ui.pushbutton_4
 btn_activity.clicked.connect(activity.act_order)
 # 初始化name列表
 name = []

 sys.exit(app.exec_())

删除只实现了同餐品在订单上的删除，没有实现数量的减少，可自行添加。

更多学习资料请关注专题《管理系统开发》。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。