保存用戶選擇中的值以在kivy中列出

Question

我是Python和Kivy框架的新手。 我需要用戶選擇列表=用戶單擊兩張圖片之一，然后根據他們的選擇，值將被推入列表中。 但是我做不到。 我應該在哪里定義要選擇的功能，以及如何在按下按鈕時調用它。 你能幫我嗎？ 編輯：通過以下方式解決問題：

file.py

from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.properties import ObjectProperty
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.image import Image
from kivy.uix.behaviors import ButtonBehavior
from kivy.properties import ListProperty
from kivy.uix.listview import ListItemButton


class ScreenOne(Screen):
    pass

class ScreenTwo(Screen):
    def add_genre(self, lang):
        app = App.get_running_app()
        app.MY_LANG = lang

class ScreenThree(Screen):
    def add_genre(self, *argv):
        app = App.get_running_app()
        for n in argv:
            app.MY_DATA.append(n)

class ScreenFour(Screen):
    def add_genre(self, gen):
        app = App.get_running_app()
        app.MY_DATA.append(gen)

class ScreenFive(Screen):
    def press_readLang(self):
        app = App.get_running_app()
        self.ids.lbl1.text = "SharedVar is " + app.MY_LANG

    def press_read(self):
        app = App.get_running_app()
        self.ids.lbl1.text = "SharedVar is " + ', '.join(app.MY_DATA)

class ScreenSix(Screen):
    pass

class ScreenSeven(Screen):
    pass

class ImageButton(ButtonBehavior, Image, BoxLayout):
    pass



class Filmy(ScreenManager):
    screen_one = ObjectProperty(None)
    screen_two = ObjectProperty(None)
    screen_three = ObjectProperty(None)
    screen_four = ObjectProperty(None)
    screen_five = ObjectProperty(None)

class FilmyApp(App):
    MY_DATA = []
    MY_LANG = ''
    MY_DATE = ''

    def build(self):
        return Filmy()



filmy = FilmyApp()
filmy.run()

file.kv

#: import main filmy
#: import ListAdapter kivy.adapters.listadapter.ListAdapter
#: import ListItemButton kivy.uix.listview.ListItemButton


<ScreenOne>:
    BoxLayout:
        Label:
            text: "Welcome to Random Movie.\nYou will see several couples of picture. \nLet yourself be emotional and choose one.\nAfter that application chooses you 3 random movies. "
        Button:
            text: "Start"
            on_press: root.manager.current = 'screen2'


<ScreenTwo>:
    BoxLayout:
        ImageButton:
            #cizojazycne: cizojazycne
            #id:cizojazycne
            on_press:
                root.manager.current = 'screen3'
                root.add_genre('en')
            source: "./zkouska.jpg"
            keep_ratio: False
            allow_stretch: True
        ImageButton:
            on_press:
                root.manager.current = 'screen3'
                root.add_genre('cz')
            source: "./zkouska.jpg"
            keep_ratio: False
            allow_stretch: True


<ScreenThree>:
    BoxLayout:
        ImageButton:
            on_press:
                root.manager.current = 'screen4'
                root.add_genre('35', '66', '44')
            source: "./zkouska.jpg"
            keep_ratio: False
            allow_stretch: True
        ImageButton:
            on_press:
                root.manager.current = 'screen4'
                root.add_genre('35', '66', '44')
                root.add_genre('dwadwad')
            source: "./zkouska.jpg"
            keep_ratio: False
            allow_stretch: True

<ScreenFour>:
    BoxLayout:
        ImageButton:
            on_press:
                root.manager.current = 'screen5'
                root.add_genre('1751')
            source: "./zkouska.jpg"
            keep_ratio: False
            allow_stretch: True
        ImageButton:
            on_press:
                root.manager.current = 'screen5'
                root.add_genre('4')
            source: "./zkouska.jpg"
            keep_ratio: False
            allow_stretch: True

<ScreenFive>
    BoxLayout:
        orientation: "vertical"

        Label:
            id: lbl1

        Button:
            text: "Film 1"
        Button:
            text: "Film 2"
        Button:
            text: "Film 3"
            on_press: root.press_read()
        Button:
            text: "Try again"
            on_press: root.manager.current = 'screen1'



<Filmy>:
    id: screen_manager

    screen_one: screen_one
    screen_two: screen_two
    screen_three: screen_three
    screen_four: screen_four
    screen_five: screen_five

    ScreenOne:
        id: screen_one
        name: 'screen1'
        manager: screen_manager

    ScreenTwo:
        id: screen_two
        name: 'screen2'
        manager: screen_manager

    ScreenThree:
        id: screen_three
        name: 'screen3'
        manager: screen_manager

    ScreenFour:
        id: screen_four
        name: 'screen4'
        manager: screen_manager

    ScreenFive:
        id: screen_five
        name: 'screen5'
        manager: screen_manager

Answer 1

您所走的路是正確的，但是如果向每個Screen添加功能，則建議在ScreenManager使用一個功能，例如：

class Filmy(ScreenManager):
    screen_one = ObjectProperty(None) # You don't need those ObjectProperty variables
    screen_two = ObjectProperty(None) # so you can delete all those
    screen_three = ObjectProperty(None)
    screen_four = ObjectProperty(None)
    screen_five = ObjectProperty(None)

    choices = {}

    @staticmethod
    def addChoice(key, value):
        choices[key] = value

然后在每個屏幕中，您可以通過調用root.manager.addChoice()來訪問此函數，例如：

ImageButton:
    #cizojazycne: cizojazycne    
    #id:cizojazycne
    on_press:
        root.manager.current = 'screen3'
        root.manager.addChoice('MY_LANG', 'en')
    source: "./zkouska.jpg"
    keep_ratio: False
    allow_stretch: True

ImageButton:
    on_press:
        root.manager.current = 'screen3'
        root.manager.addChoice('MY_LANG', 'cz')
    source: "./zkouska.jpg"
    keep_ratio: False
    allow_stretch: True

現在，您將擁有一dictionary ，其中包含您可以隨時訪問的所有選擇。

另外，最好將on_release用於按鈕，而不要使用on_press來顯示新聞動畫，然后再移至下一個屏幕（以看起來更好）。