title: What is -[NSString sizeWithFont:forWidth:lineBreakMode:] good for?
body: <p>In my question "<a href="https://stackoverflow.com/questions/419222/how-do-i-get-nsstring-sizewithfontforwidthlinebreakmode-to-work">How do I get <code>-[NSString sizeWithFont:forWidth:lineBreakMode:]</code> to work?</a>", I learned that <code>-[NSString sizeWithFont:constrainedToSize:lineBreakMode:]</code> was actually what I needed.</p>
  
  <p>The documentation for <code>-[NSString sizeWithFont:forWidth:lineBreakMode:]</code> states explains it doesn't actually wrap the text to additional lines.  So how would I use it?  (Examples would help.)</p>