title: iPhone Digital Clock
body: <p>After the long time I spent getting an analog clock to work, I am trying to make a digital one (<em>sigh</em>).  I am trying to do this with 10 PNGs with the numbers 0 - 9.  Each digit of the clock would be an image.  The only problem with this is retrieving the certain digit from the current time.  I've tried converting the time to a string and using the characterAtIndex, but that doesn't seem to work.  What would be the best way to get around this?</p>