轮播和导航抽屉工具栏问题Kivymd + Python

如何解决轮播和导航抽屉工具栏问题Kivymd + Python

我想添加一个包含轮播小部件的屏幕（以幻灯片方式显示图像）。而且，我已经在我的脚本中添加了一个导航工具栏和一个导航抽屉。虽然，我在屏幕 2 中添加了轮播，但它阻止我访问导航抽屉（导航工具栏顶部的 3 行）。请帮忙..

from kivy.lang import Builder
from kivy.core.window import Window
from kivy.uix.Boxlayout import BoxLayout
from kivy.properties import ObjectProperty
from kivymd.theming import ThemableBehavior
from kivymd.uix.list import MDList
from kivymd.app import MDApp
from kivymd.uix.expansionpanel import MDExpansionPanel,MDExpansionPanelThreeLine
from kivy.uix.popup import Popup
from kivy.uix.image import Image



Window.size = (300,500)
navigation_helper = """
<MyTile@SmartTileWithLabel>
    size_hint_y: None
    height: "240dp"
Screen:
    MDToolbar:
        id: toolbar
        pos_hint: {"top": 1}
        elevation: 10
        title: "Navigation ToolBar"
        left_action_items: [["menu",lambda x: nav_drawer.set_state("open")]]
        
    NavigationLayout:
        x: toolbar.height

        ScreenManager:
            id: screen_manager

            Screen:
                name: "Screen1"
                MDLabel:
                    text: "Screen1"
                    halign: "center"
                MDCard:
                    size_hint: None,None
                    size: "10dp","10dp"
                    pos_hint: {"center_x": .5,"center_y": .5}
                    on_press:
                        nav_drawer.set_state("close")
                        screen_manager.current = "Screen4"

                    
            Screen:
                name: "Screen5"     

            Screen:
                name: "Screen2"
                MDLabel:
                    text: "Screen2"
                    halign: "center"
                BoxLayout:
                    orientation: "vertical"
                    Screen: 
                        Carousel:
                            MDFloatLayout:
                                MDCard:
                                    size_hint: .5,.5
                                    pos_hint: {"center_x":0.2,"center_y":0.2}
                                    Image:
                                        source: "new.png"
                                    MDIconButton:
                                        icon:"facebook"
                                        icon:"google"
                            MDFloatLayout:
                                MDCard:
                                    size_hint: .5,.5
                                    pos_hint: {"center_x":0.5,"center_y":0.5}
                                    Image:
                                        source: "new1.png"
                                    MDIconButton:
                                        icon:"facebook"
                                        icon:"google"
                
            Screen:
                name: "Screen4"
                MDLabel:
                    text: "Screen4"
                    halign: "center"

        MDNavigationDrawer:
            id: nav_drawer

            ContentNavigationDrawer:
                screen_manager: screen_manager
                nav_drawer: nav_drawer
           
                ScrollView:
                    MDList:

                        OneLineListItem:
                            text: "Screen1"
                            on_press:
                                nav_drawer.set_state("close")
                                screen_manager.current = "Screen1"
            
                        OneLineListItem:
                            text: "Screen2"
                            on_press:
                                nav_drawer.set_state("close")
                                screen_manager.current = "Screen2"


"""

class DemoApp(MDApp):
    class ContentNavigationDrawer(BoxLayout):
        screen_manager = Objectproperty()
        nav_drawer = Objectproperty()

    # class DrawerList(ThemableBehavior,MDList):
    #     pass

    def build(self):
        screen = Builder.load_string(navigation_helper)
        return screen

    def on_start(self):
        pass

DemoApp().run()