擅长:python、mysql、java
<p>您可以执行<code>while</code>循环</p>
<pre><code>oldString = "Hello world"
cutOff = 10
i = 0
while i < cutOff and cutOff < len(oldString):
if oldString[i] in [' ', '\n']: cutOff += 1
i += 1
splitString = oldString[:cutOff]
</code></pre>