我遇到了同樣的問題，您可以使用線程來實現。

我不確定您要完成什么，但是假設您想在單擊按鈕時加載某些內容。加載時你想顯示一個彈出窗口說“正在加載”。這是一個簡單的示例程序，可以讓您執行此操作。

main.py

import threading

import time

from kivy.app import App

from kivy.uix.popup import Popup

from kivy.uix.label import Label

class ExampleApp(App):

    def show_popup(self):

        # Create and open a popup

        self.loading_pop = Popup(title='Please wait', 

                                 content=Label(text='Loading...'),

                                 size_hint=(.8, .5), auto_dismiss=False)

        self.loading_pop.open()

    def process_btn_click(self):

        self.show_popup() # Open the popup

        # Start a thread, this allows you to display the popup while

        #     running some long task

        my_thread = threading.Thread(target=self.some_long_task)

        my_thread.start()

    def some_long_task(self):

        current_time = time.time()

        while current_time + 3 > time.time():  # 3 seconds

            time.sleep(1)

        # When the task is done, let the popup display "Done!"

        self.loading_pop.content.text = 'Done!'

        # Also let the user click out of the popup now

        self.loading_pop.auto_dismiss = True

if __name__ == '__main__':

    ExampleApp().run()

例子.kv

Screen:

    Button:

        text: 'Click me'

        pos_hint: {'center_x': .5, 'center_y': .5}

        size_hint: .3, .2

        on_release:

            app.process_btn_click()

希望這回答了你的問題！