擅长:python、mysql、java
<p>Tkinter用<a href="http://infohost.nmt.edu/tcc/help/pubs/tkinter/web/universal.html" rel="nofollow">^{<cd1>}</a>方法提供了这个问题的解决方案。您必须存储<code>after</code>返回的“after identifier”并将其传递给<code>after_cancel</code>:</p>
<pre><code>def start_countdown(self):
if self.after_id is not None:
self.after_cancel(self.after_id)
self.countdown()
def countdown(self):
# ...
self.after_id = self.after(1000, self.countdown)
</code></pre>