擅长:python、mysql、java
<p>尝试以下解决方案:</p>
<pre><code>class TestScreen (Screen)
def openpopup(self)
popup = Popup()
self.button = Button(on_press=self.method, text='1')
popup.add_widget(button)
popup.open()
def method(self)
self.label.text = self.button.text
</code></pre>