Kivy弹出窗口显示与主屏幕相同的按钮

from kivy.app import App
from kivy.uix.popup import Popup
from kivy.uix.button import Button
from kivy.uix.gridlayout import GridLayout


class MyPopup(Popup):
    def __init__(self, **kwargs):
        super(MyPopup, self).__init__(**kwargs)
        
        # 创建一个网格布局
        layout = GridLayout(cols=1)
        
        # 创建一个按钮并添加到网格布局中
        button = Button(text='按钮')
        layout.add_widget(button)
        
        # 将网格布局设置为弹出窗口的内容
        self.content = layout


class MyApp(App):
    def build(self):
        # 创建一个按钮来触发弹出窗口
        button = Button(text='显示弹出窗口', on_release=self.show_popup)
        return button
    
    def show_popup(self, *args):
        # 创建并显示弹出窗口
        popup = MyPopup()
        popup.open()


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