Kivy:在按下按钮时更新TextInput

from kivy.app import App
from kivy.uix.button import Button
from kivy.uix.textinput import TextInput
from kivy.uix.boxlayout import BoxLayout

class MyLayout(BoxLayout):
    def update_text(self, button):
        text_input = self.ids.my_text_input  # 获取TextInput的实例
        text_input.text = "Button pressed"  # 更新TextInput的文本内容

class MyApp(App):
    def build(self):
        layout = MyLayout()
        button = Button(text="Press me")
        button.bind(on_press=layout.update_text)
        layout.add_widget(button)
        return layout

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