Question

这是1中的3个问题。

错误＃1：＆＃39; NoneType＆＃39;对象没有属性＆＃39; text＆＃39;

错误＃2：＆＃39; NoneType＆＃39;对象没有属性＆＃39;适配器＆＃39;

我一直在尝试调试这几个小时

当我点击添加按钮时，我收到错误＃1
当我点击删除按钮时，我收到错误＃2
如何设置Kivy ListItemButton和Spinner的样式。我已阅读文档但无法理解！

如果我的问题冒犯了你，我很抱歉。

这里是github存储库：https://github.com/CoreElites/nairamanager

谢谢

这是kivy文件：nairamanager.kv

<ViewEditProducts>:

BoxLayout:
    product_name: product_name
    product_list: product_list
    orientation: "vertical"
    size: root.size
    BoxLayout:
        orientation: "horizontal"
        size_hint: (1,None)
        height: root.height*.1
        BackButton:
            id: back_button
            markup: True
            align: "center"
            font_size: "50sp"
            size_hint: (.1,1)
            on_press:
                root.manager.current = "news_feed_screen"
                root.manager.transition.direction = "left"
        TopLabel:
            text: "[b]View Edit Products[/b]"
            halign: "left"
            markup: True
            font_size: "15sp"
            font_name: "Arimo"
    BoxLayout:
        orientation: "horizontal"
        size_hint: (1,None)
        height: (root.height*.07)+self.padding[1]+self.padding[3]
        spacing: 10
        padding: (root.width*.25,root.height*.1,root.width*.25,root.height*.03)
        UniTextInput:
            id: product_name
            hint_text: "Product Name"
        GreenButton:
            text: "Add"
            size_hint: (.3,1)
            on_press: root.add_product()
        GreenButton:
            id: delete_green_button
            text: "Delete"
            size_hint: (.3,1)
            on_press: root.delete_product()
    BoxLayout:
        orientation: "vertical"
        size_hint: (1,root.height*.3)
        padding: (root.width*.25,0,root.width*.25,root.height*.1)
        ListView:
            id: product_list
            adapter:
                ListAdapter(data=[str(i) for i in range(1,32)], selection_mode="multiple", cls=ListItemButton)

这是实际代码：

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

# import kivy configuration file
from kivy.config import Config
# Config.set("graphics", "resizable", 0)

import kivy

# kivy version in use
kivy.require("1.9.1")

# importing needed classes
from kivy.app import App
from kivy.uix.gridlayout import GridLayout
from kivy.uix.scrollview import ScrollView
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.anchorlayout import AnchorLayout
from kivy.uix.label import Label
from kivy.core.text import LabelBase
from kivy.uix.button import Button
from kivy.uix.widget import Widget
from kivy.core.window import Window
from kivy.core.window import WindowBase
from kivy.uix.image import Image
from kivy.properties import ObjectProperty,ListProperty,StringProperty
from kivy.uix.image import Image
from kivy.uix.listview import ListItemButton
from kivy.adapters.listadapter import ListAdapter
from kivy.uix.screenmanager import                ScreenManager,Screen,FadeTransition,FallOutTransition,WipeTransition,NoTransition,SlideTransition,RiseInTransition,SwapTransition

# Change the background color of window
Window.clearcolor = (1,1,1,1)


class LoginSignUp(Screen):
    pass

class Login(Screen):
    pass

class SignUp(Screen):
    pass

class SignUpTerms(Screen):
    pass

class NewsFeed(Screen):
    pass

class ViewEditProfile(Screen):
    pass

class ViewEditProducts(Screen):
    product_name = ObjectProperty()
    product_list = ObjectProperty()

    def add_product(self):
        # Get product name
        product_name = self.product_name.text

        # Add to list
        self.product_list.data.extend([product_name])

        # Refresh list
        self.product_list._trigger_reset_populate()

    def delete_product(self,*args):

        # If item selected
        if self.product_list.adapter.selection:

            # Get the text from selected
            selection = self.product_list.adapter.selection[0].text

            # Remove the item
            self.product_list.remove(selection)

            # Refresh list
            self.product_list._trigger_reset_populate()

class ProductList(ListItemButton):
    pass


class ViewEditExpenditures(Screen):
    pass

class ViewEditAssetsLiabilities(Screen):
    pass

class GetLoan(Screen):
    pass

class FinancialStatement(Screen):
    pass

class ProfitLossStatement(Screen):
    pass

class BalanceSheet(Screen):
    pass

class SalesForecast(Screen):
    pass

class About(Screen):
    pass

# Screen management
class ScreenManagement(ScreenManager):

    # Set property for screens
    transition = NoTransition()
    login_signup = ObjectProperty(None)
    login = ObjectProperty(None)
    signup = ObjectProperty(None)
    signup_terms = ObjectProperty(None)
    view_edit_profile = ObjectProperty(None)
    view_edit_products = ObjectProperty(None)
    view_edit_expenditures = ObjectProperty(None)
    view_edit_assets_liabilities = ObjectProperty(None)
    get_loan = ObjectProperty(None)
    financial_statement = ObjectProperty(None)
    profit_loss_statement = ObjectProperty(None)
    balance_sheet = ObjectProperty(None)
    sales_forecast = ObjectProperty(None)
    news_feed = ObjectProperty(None)
    about = ObjectProperty(None)

class NairaManagerRegister(Screen):
    pass


class NairaManagerApp(App):
    icon = "images/favicon_32.png"
    title = "Naira Manager"

    def build(self):
        return ScreenManagement()

if __name__ == "__main__":
    LabelBase.register(name="Roboto",     fn_regular="fonts/roboto_regular.ttf", fn_bold="fonts/roboto_bold.ttf")
    LabelBase.register(name="Arimo", fn_regular="fonts/arimo_regular.ttf", fn_bold="fonts/arimo_bold.ttf")
    LabelBase.register(name="Webdings", fn_regular="fonts/webdings.ttf")
    NairaManagerApp().run()

Answer 1

现在已经很晚了，但我遇到了类似的问题。通过将此代码product_name: product_name product_list: product_list置于BoxLayout:之外，可以使此代码正常工作。我认为问题是由于product_list的范围。

＆＃39; NoneType＆＃39;对象没有属性＆＃39; adapter＆＃39;，＆＃39; NoneType＆＃39;对象没有属性＆＃39; text＆＃39;

1 个答案: