iPhone - Comparing two times
<p>I have two time values in HH:mm format that I need to compare, and return how many minutes they differ by.  For example comparing 18:30 and 19:45 should return 1:15.  I've read up on NSDate, NSCalendar, and so on, but I am confused as to how they all work together and how I would create an NSDate with only a time, not an entire date.</p>
