擅长:python、mysql、java
<p>这座桥的神奇之处之一。您只需使用选择器的字符串方法名(使用冒号,而不是下划线):</p>
<pre><code>>>> from AppKit import *
>>> s = NSString.stringWithString_("Lemon curry?")
>>> s.respondsToSelector_("length")
True
>>> s.respondsToSelector_("count")
False
>>> s.respondsToSelector_("writeToFile:atomically:encoding:error:")
True
>>> s.performSelector_("lowercaseString")
u'lemon curry?'
</code></pre>