维基百科-api如何在kivy中滚动页面？

from kivy.app import App
from kivy.network.urlrequest import UrlRequest
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.uix.scrollview import ScrollView

class WikiApp(App):
    def build(self):
        # 创建ScrollView和BoxLayout
        scroll_view = ScrollView()
        box_layout = BoxLayout(orientation='vertical', spacing=10, padding=(10, 10))

        # 发送维基百科API请求
        url = 'https://en.wikipedia.org/w/api.php?action=query&format=json&list=search&srsearch=kivy'
        request = UrlRequest(url, self.on_request_success)

        # 将BoxLayout添加到ScrollView中
        scroll_view.add_widget(box_layout)

        return scroll_view

    def on_request_success(self, request, result):
        # 解析维基百科API返回的JSON数据
        pages = result['query']['search']
        for page in pages:
            title = page['title']
            snippet = page['snippet']

            # 创建Label并添加到BoxLayout中
            label = Label(text=f'{title}\n{snippet}', size_hint_y=None, height=100)
            self.root.children[0].add_widget(label)

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