what is mean -(IBAction) behavior function?
<p>hi i'm studying iOS but i have a trouble.</p>

<p>here are four kind of functions..</p>

<pre><code>-(IBAction) behavior : (UIButton *) sender;

-(IBAction) behavior : (id) sender;

-(IBAction) behavior : sender;

-(IBAction) behavior;
</code></pre>

<p>i know about top three things. but i don't know about the last function</p>

<pre><code>-(IBAction) behavior;
</code></pre>

<p>what is mean? and when i use this?</p>

<p>if i have a button, then i can use this function</p>

<p>but i can't use that. if i have a slider, or picker view.. whatever</p>

<p>it's the only use for button??</p>
