「NoneType」對象沒有屬性「適配器」，「NoneType」對象沒有屬性「文本」

Question

這是在1

錯誤＃1一3個問題：「NoneType」對象沒有屬性「文本」

錯誤＃2：「NoneType」對象有沒有屬性「適配器」

我一直在試圖調試這幾個小時

1. 當我點擊添加按鈕，我得到錯誤＃1
2. 當我點擊刪除按鈕我得到錯誤＃2
3. 如何樣式Kivy ListItemButton和微調。我已閱讀文檔，但無法理解！

如果我的問題冒犯了您，我很抱歉。

這裏是GitHub的庫：https://github.com/CoreElites/nairamanager

謝謝

這裏是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) 

這是實際的代碼：

# -*- 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

現在已經很晚了，但我也有類似的問題。通過將此代碼product_name: product_name product_list: product_list置於BoxLayout:之外，可以使此代碼生效。我認爲問題是由於product_list的範圍。