如何在scrollview Kivy中将小部件添加到标签

from kivy.app import App
from kivy.uix.scrollview import ScrollView
from kivy.uix.label import Label
from kivy.uix.gridlayout import GridLayout

class ScrollViewApp(App):
    def build(self):
        # 创建一个ScrollView小部件
        scrollview = ScrollView()

        # 创建一个GridLayout布局，用于容纳标签
        layout = GridLayout(cols=1, spacing=10, size_hint_y=None)

        # 设置布局的高度为标签的总高度
        layout.bind(minimum_height=layout.setter('height'))

        # 创建多个标签，并将它们添加到布局中
        for i in range(10):
            label = Label(text=f'This is label {i}', size_hint_y=None, height=40)
            layout.add_widget(label)

        # 将布局添加到ScrollView的子部件中
        scrollview.add_widget(layout)

        return scrollview

ScrollViewApp().run()