如何在回收視圖中獲取kivymd串列的文本值？

我是 kivymd 的新手，我需要生成一個帶有兩個螢屏的應用程式，第二個螢屏在回收視圖中顯示一個 TwoLineListItem，我需要系結一個函式，該函式接受所選行上的文本并將其放入文本字??段主視窗，但我收到此錯誤：

型別錯誤：click_supplier() 缺少 1 個必需的位置引數：'supplier_list_item'

這是我的代碼的類似示例：

PY

from kivy.lang import Builder
from kivymd.app import MDApp
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.screenmanager import Screen, ScreenManager
from kivymd.uix.list import OneLineListItem, TwoLineListItem
from kivy.uix.recycleview import RecycleView
from kivy.metrics import dp

suppliers=['Amazon', 'Ebay', 'Alibaba', 'Linio', 'Aliexpress']
suppliers_id=['198', '283', '343', '454', '203']


class MainWindow(Screen):
    pass

class SelectSupplierWindow(Screen):
    pass


class BrisaWindowManager(ScreenManager):
    pass


class MainApp(MDApp):

    #define build parameters
    product_dialog=None
    selected_products_list=[]
    def build(self):
        self.theme_cls.theme_style="Light"
        self.theme_cls.primary_palette="Green"
        return Builder.load_file('example.kv')


    def go_to_screen(self, screen):
        self.root.current=screen

    #start suppliers list
    def on_start(self):

        self.set_list_of_suppliers()

    #Autofill supplier search field--------------------------------------------------
    def set_list_of_suppliers(self, text="", search=False):


        def add_supplier_item(name_supplier):
            self.root.get_screen('select_supplier').ids.suppliers_rv.data.append(
                {
                    "viewclass": "TwoLineListItem",
                    "text": name_supplier,
                    "secondary_text": f'Code: {suppliers_id[suppliers.index(name_supplier)]}',
                    "on_release": self.click_supplier,
                }
            )

        self.root.get_screen('select_supplier').ids.suppliers_rv.data = []
        for name_supplier in suppliers:
            if search:
                if text.lower() in name_supplier.lower():
                    add_supplier_item(name_supplier)
            else:
                add_supplier_item(name_supplier)




    def click_supplier(self, supplier_list_item):
        self.root.get_screen('main').ids.oc_supplier.text=supplier_list_item.text
        self.go_to_screen('main')


MainApp().run()

千伏

BrisaWindowManager:
    MainWindow:
        id:main_window
    SelectSupplierWindow:

<MainWindow>
    name: 'main'
    MDBoxLayout:
        orientation: 'vertical'
        MDToolbar:
            title: 'Brisa'
        MDBottomNavigation:
            MDBottomNavigationItem:
                id: oc_screen
                name: 'screen 1'
                text: 'Purchase'
                icon: 'clipboard-list'

                MDBoxLayout:
                    orientation: 'vertical'
                    padding:dp(20)
                    spacing: dp(15)

                    MDTextField:
                        id: oc_supplier
                        hint_text: 'Select'
                        helper_text: 'Select'
                        helper_text_mode: 'on_focus'
                        mode: 'fill'
                        halign:'center'
                        on_focus:
                            app.root.current='select_supplier'
                            root.manager.transition.direction='up'

            MDBottomNavigationItem:
                name: 'screen 2'
                text: 'Check'
                icon: 'truck-check'


<SelectSupplierWindow>
    name:'select_supplier'
    MDBoxLayout:
        orientation: 'vertical'
        MDToolbar:
            title: 'Select'
            left_action_items: [['arrow-left', lambda x: app.go_to_screen(screen='main'), 'back']]
        MDBoxLayout:
            orientation:'vertical'
            spacing: dp(10)
            padding: dp(20)
            MDBoxLayout:
                adaptive_height:True

                MDIconButton:
                    icon: 'magnify'
                MDTextField:
                    id: search_field
                    on_text: app.set_list_of_suppliers(self.text, True)
            RecycleView:
                id: suppliers_rv
                key_viewclass: 'viewclass'
                key_size: 'height'
                RecycleBoxLayout:
                    padding: dp(10)
                    default_size: None, dp(60)
                    default_size_hint: 1, None
                    size_hint_y: None
                    height: self.minimum_height
                    orientation: 'vertical'

觸發錯誤是因為單擊項函式需要單擊的行，但我無法將此事件系結到該函式。

提前致謝！

uj5u.com熱心網友回復：

如何將您的add_supplier_item()方法更改為：

    def add_supplier_item(name_supplier):
        self.root.get_screen('select_supplier').ids.suppliers_rv.data.append(
            {
                "viewclass": "TwoLineListItem",
                "text": name_supplier,
                "secondary_text": f'Code: {suppliers_id[suppliers.index(name_supplier)]}',
                "on_release": partial(self.click_supplier, name_supplier),
            }
        )

以及您的click_supplier()方法：

def click_supplier(self, supplier_list_item):
    self.root.get_screen('main').ids.oc_supplier.text=supplier_list_item
    self.go_to_screen('main')

與其嘗試傳遞專案，不如傳遞文本。

標籤：Python 基维 基维姆德

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