KivyMD库组件缺失求助：无法导入MDFloatingActionButtonSpeedDial

Hey there! As someone who’s worked with KivyMD on multiple projects, I’ve run into this exact snag before—let’s get your graduation app back on track quickly.

Why This Error Pops Up #

The MDFloatingActionButtonSpeedDial component was moved out of the kivymd.uix.button module in newer KivyMD versions. That’s why your import fails even though other button components work. The missing "toolbar folder" you noticed is also a version mismatch quirk—modern KivyMD organizes components into dedicated modules instead of the folder structure you might expect to see directly in your site-packages.

Step-by-Step Fixes #

1. Check Your KivyMD Version
   First, confirm which version you’re using to confirm the component shift. Run this in your terminal:

   pip show kivymd
   

   If you’re on a version older than 1.0.0, this component relocation is almost definitely the issue.

2. Update Your Import Statement
   Replace your original import line with these two separate lines—this points to the correct module for each component:

   from kivymd.uix.button import MDRoundImageButton
   from kivymd.uix.speeddial import MDFloatingActionButtonSpeedDial
   

   The speed dial component now lives in the speeddial module, not the button module.

3. Resolve Toolbar-Related Confusion
   For toolbar components (like top app bars), you’ll import directly from the toolbar module. For example:

   from kivymd.uix.toolbar import MDTopAppBar
   

   You don’t need to hunt for a physical "toolbar folder"—KivyMD handles the module structure behind the scenes.

4. Upgrade KivyMD (If Needed)
   If you still encounter missing components, upgrade to the latest stable version to get access to all current features and correct component organization:

   pip install --upgrade kivymd
   

Quick Working Code Example #

Here’s a tiny snippet to confirm your imports work as expected:

from kivy.app import App
from kivymd.uix.button import MDRoundImageButton
from kivymd.uix.speeddial import MDFloatingActionButtonSpeedDial
from kivymd.uix.screen import MDScreen

class GraduationApp(App):
    def build(self):
        screen = MDScreen()
        speed_dial = MDFloatingActionButtonSpeedDial()
        screen.add_widget(speed_dial)
        return screen

if __name__ == "__main__":
    GraduationApp().run()

Give these steps a go, and your component imports should start working smoothly. Good luck with your graduation app—you’ve got this!

内容的提问来源于stack exchange，提问作者Rebeka Panáková