Question

我目前正在构建一个将Excel工作表转换为JSON格式的小程序。我希望每次进行更改或更新时，excel文件都使用进行更改的人的登录名和日期信息进行更新。我使用KivyMD创建了两个屏幕，一个屏幕用于登录数据，另一个屏幕用于excel功能。我当前的问题是我想从上一个屏幕获取登录信息，但是我很难理解如何获取数据。我尝试使用在上一篇文章中找到的以下行，在“更新”屏幕中创建一个“登录”变量，该变量引用“日志”屏幕中的ID：“ 登录= self.manager.screens [1]” .ids.login.text ”

但是该行给我以下错误：“
登录= self.manager.screens [1] .ids.login.text 在kivy.properties.ObservableDict中，文件863行的“ kivy \ properties.pyx”。 getattr AttributeError：“超级”对象没有属性“ getattr ” “

我是KivyMD的新手，我很确定这里没有看到或遗失的东西。我将不胜感激。

这是我的.py文件：

results[which.max(as.numeric(do.call(rbind, results)[,2]))]
#[[1]]
#[1] "Value3" "20"

这是我的.kv文件：

import os.path
from kivymd.app import MDApp
from kivy.uix.screenmanager import Screen, ScreenManager
from kivy.lang import Builder
from kivymd.uix.button import MDFlatButton
from kivymd.uix.dialog import MDDialog
from helpers import screen_helper_2
from kivy.core.window import Window
from datetime import datetime
import json
import functions as function

Window.size = (400, 500)


# AlbacoreLog Screen Fully Functional
class AlbacoreLogScreen(Screen):
    def show_login(self, *args):
        close_button = MDFlatButton(text='Close', on_release=self.close_dialog)
        if self.ids.login.text is "":
            check_string = 'Please enter Login or Name'
            self.dialog = MDDialog(text=check_string,
                                   size_hint=(0.7, 1),
                                   buttons=[close_button])
            self.dialog.open()

        else:
            self.manager.current = 'function'

    def close_dialog(self, obj):
        self.dialog.dismiss()


class AutoUpdateScreen(Screen):
    def albacorize_update(self, *args):
        def close_ext(*args):
            dialog_ext.dismiss()

        def close_ext_2(*args):
            dialog_5.dismiss()

        def close_update(*args):
            dialog_update.dismiss()

        close_button_ext_2 = MDFlatButton(text='Close', on_release=close_ext_2)
        close_button_ext = MDFlatButton(text='Close', on_release=close_ext)
        close_button_update = MDFlatButton(text='Close', on_release=close_update)

        if self.ids.change.text is "":
            dialog_update = MDDialog(text='Also, make sure to add your update',
                                     size_hint=(0.7, 1),
                                     buttons=[close_button_update])
            dialog_update.open()

            self.back_to_update()

        if self.ids.ms.text is "":
            dialog_ext = MDDialog(text='Please enter Master Sheet name and extension',
                                  size_hint=(0.7, 1),
                                  buttons=[close_button_ext])
            dialog_ext.open()

            self.back_to_update()
        elif type(self.ids.ms.text) is str:
            ms = self.ids.ms.text
            update = self.ids.change.text
            if os.path.isfile(ms):
                login = self.manager.screens[1].ids.login.text
                now = datetime.now()
                time_date = now.strftime("%d/%m/%Y %H:%M:%S")
                print("File exist")

                q_and_a_section = function.question_answer_build(ms)
                node_section = function.section_build(ms)
                function.updates(ms, login, time_date, update)  ##I want to pass the login data to a different module on my program in order to build the new excel sheet.

                
            else:
                print("File not exist")
                dialog_5 = MDDialog(text='MS does not have extension or is not in current root folder',
                                    size_hint=(0.7, 1),
                                    buttons=[close_button_ext_2])
                dialog_5.open()
                self.manager.current = 'msautomap'

    def back_to_function(self, *args):
        self.manager.current = 'function'

    def back_to_update(self, *args):
        self.manager.current = 'msautoupdate'


sm = ScreenManager()
sm.add_widget(AlbacoreLogScreen(name='log'))
sm.add_widget(AutoUpdateScreen(name='msautoupdate'))


class AlbacorizerApp(MDApp):
    def build(self):
        self.theme_cls.primary_palette = "Yellow"
        self.theme_cls.primary_hue = "A700"
        self.theme_cls.theme_style = "Dark"
        screen = Builder.load_string(screen_helper_2)

        return screen


AlbacorizerApp().run()

Answer 1

尝试更改：

login = self.manager.screens[1].ids.login.text

收件人：

login = self.manager.get_screen('log').ids.login.text

使用self.manager.screens[1]会使代码取决于Screens列表中screens的顺序（而[1]是错误的）。使用get_screen('log')使您的代码独立于Screens的顺序（并获得正确的代码）。

KivyMD通过屏幕共享变量/数据

1 个答案: