title: Objective C BitConverter Equivalent
body: <p>I'm wondering if there is an Objective C equivalent to .Net's BitConverter.GetBytes() method.</p>
  
  <p>For example, in C#, I can write something like this:</p>
  
  <p>byte[] lengthPrefix = BitConverter.GetBytes(message.length);</p>
  
  <p>What would the equivalent be in Objective C?  </p>
  
  <p>Some example code would be greatly appreciated.</p>
  
  <p>Thanks in advance.</p>