如何在 Kivy python 中最大化滚动条?

Here is an example of how to extend ScrollView to also get a dragable slider.

from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.lang import Builder
from kivy.uix.label import Label

Builder.load_string("""
<ScrollSlider>:
    ScrollView:
        id: scrlvw
        bar_width: 0
        GridLayout:
            id: grid
            size_hint_y:None
            cols:1
            height: self.minimum_height
            scroll_y: slider.value
            on_touch_move: slider.value = self.scroll_y
    Slider:
        size_hint_x: None
        width: root.width*0.2
        id: slider
        min: 0
        max: 1
        orientation: 'vertical'
        value: scrlvw.scroll_y
        on_value: scrlvw.scroll_y = self.value

""")


class ScrollSlider(BoxLayout):

    def custom_add(self, widget):
        self.ids.grid.add_widget(widget)

class MyApp(App):


    def build(self):
        scrollslider = ScrollSlider()
        for i in range(1, 100):
            scrollslider.custom_add(Label(text=str(i), height=100, size_hint_y=None))
        return scrollslider

if __name__ == '__main__':
    MyApp().run()

你需要使用custom_add在ScrollSlider中添加widget或者在kivy中添加到GridLayout中.