My partner and I are trying to figure out how best to create scaling, colored performance bars for one of our mobile exam-prep apps. The goal is to create a horizontal bar that graphically represents a scale of 0 - 100% using Photoshop or something similar. We had hired a professional graphics designer but we're left holding the bag trying to figure out how to make the graphics actually "fill the bar" in the actual app.
(I can't post pictures yet, but you can see a link to the picture here): http://www.productionplanningpro.com/wp-content/uploads/2012/06/Screen-Shot-2012-06-25-at-9.47.24-PM.png
As the bar would reach certain percentages, it would change color from Red to Green appropriately. I'm trying to figure out how to give this to my contractor without handing him 100 files, each showing 1% more of the bar (and even then, I'm not a graphics artist, so this whole thing is above my head). I've done as much research as I can stand, and I've seen the fancy iOS graphing APIs - we're just looking to fill in these two bars.
Any insight or help is SUPER appreciated!! Thanks! Jotuned