标签的文本可以是kivy属性，以后可以更改，并且由于它是kivy属性，它将在所有地方自动更新。这是您的.py的示例
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import StringProperty
import random
class YourWidget(Widget):
random_number = Stringproperty()
def __init__(self, **kwargs):
super(YourWidget, self).__init__(**kwargs)
self.random_number = str(random.randint(1, 100))
def change_text(self):
self.random_number = str(random.randint(1, 100))
class YourApp(App):
def build(self):
return YourWidget()
if __name__ == '__main__':
YourApp().run()
和你的.kv
<YourWidget>:
@R_459_2419@Layout:
size: root.size
Button:
id: button1
text: "Change text"
on_release: root.change_text()
Label:
id: label1
text: root.random_number
602392714
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