Kivymd on_release 按钮​​使用 MDCard 进行下一步的操作不起作用

Posted 2023-04-14

【中文标题】Kivymd on_release 按钮​​使用 MDCard 进行下一步的操作不起作用

【英文标题】：Kivymd on_release Button the action for next step with MDCard does not work

【发布时间】：2021-03-26 11:22:40

【问题描述】：

我正在尝试让按钮 click on_release: app.proximo() 具有转到下一张卡片 MDFloatLayout 的动作，但我没有得到它，有人可以帮助我如何工作吗？

在 main.py 文件下面，启动应用程序的位置，main.kv 文件，主应用程序在哪里，最后是dashboard.kv 文件，我在应用程序内调用我的卡

from kivymd.app import MDApp
from kivy.lang import Builder
from kivy.uix.screenmanager import Screen

class DashBoard(Screen):
    pass
class FirstScreen(Screen):
    pass

class Lavanderia(MDApp):
    def build(self):
        self.title="Texto Titulo"
        self.theme_cls.primary_palette = "LightBlue"
        return Builder.load_file("main.kv")

    def proximo(self):
        self.root.ids.carousel.load_next(mode="proximo")# Próximo Card
    def fecharApp(self):
        self.stop()# Fecha Aplicativo
Lavanderia().run()



#:import rgba kivy.utils.get_color_from_hex
#: include dashboard.kv
#: include firstscreen.kv
NavigationLayout:
    id: nav_layout
    ScreenManager:
        Screen:
            BoxLayout:
                orientation:'vertical'
                MDToolbar:
                    title: app.title
                    elevation:10
                    left_action_items:[["menu", lambda x: nav_drawer.set_state()]]
                ScreenManager:
                    id: screen_manager
                    DashBoard:
                        id:dashboard
                        name:"dashboard"
                    FirstScreen:
                        id:first_screen
                        name:"first_screen"
    MDNavigationDrawer:
        id: nav_drawer
        BoxLayout:
            orientation:'vertical'
            padding:"8dp"
            spacing:"8dp"
            Image:
                pos_hint:"x":.24,"y":.0
                size_hint: None, None
                size:dp(146), dp(158)
                source:"images/logo.png"  
            ScrollView:
                MDList:
                    OneLineIconListItem:
                        text:"Tela 1"
                        on_release:
                            screen_manager.current = "dashboard"
                            nav_drawer.set_state()
                        IconLeftWidget:
                            icon:"dishwasher"
                    OneLineIconListItem:
                        text:"Tela 2"
                        on_release:
                            screen_manager.current = "first_screen"
                            nav_drawer.set_state()
                        IconLeftWidget:
                            icon:"dishwasher"



<DashBoard>:
    MDFloatLayout:
        MDCard:
            size_hint: dp(.45), dp(.8)
            pos_hint:"center_x": .5, "center_y": .5
            Carousel:
                id:carousel
                MDFloatLayout:
                    MDTextField:
                        hint_text:"Texto 1"
                        size_hint_x:dp(.8)
                        pos_hint:"center_x": .5, "center_y": .48
                    MDRaisedButton:
                        text: "Proximo"
                        size_hint_x:dp(.8)
                        pos_hint:"center_x":.5,"center_y":.2
                        on_release: app.proximo() # Proximo step
                MDFloatLayout:
                    MDLabel:
                        text:"Texto Final Conclusão"
                        theme_text_color:"Custom"
                        bold:True
                        pos_hint:"center_x":.68,"center_y":.5
                        font_style:"H5"
                    MDRaisedButton:
                        text: "Fechar Aplicativo"
                        text_color:rgba("#00FF69")
                        size_hint_x:dp(.8)
                        pos_hint:"center_x":.5,"center_y":.4
                        md_bg_color:rgba("#333333")
                        on_release: app.fecharApp() #fechar Aplicativo

【参考方案1】：

您正试图通过根屏幕打开旋转木马，但它位于仪表板屏幕内。

所以你必须先导航到那里，然后才能调用你的函数。

def proximo(self):
    dashboard = self.root.ids.dashboard
    carousel = dashboard.ids.carousel
    carousel.load_next(mode="proximo")
    # Same as
    # self.root.ids.dashboard.ids.carousel.load_next(mode="proximo")

【讨论】：

亚瑟非常感谢你，我的朋友问题解决了，我得到了问题，谢谢