See the bunny in the screenshot to the right? It started life as a Photoshop shape. As you see it there in the simulator, it's now a UIBezierPath. It got there courtesy of PaintCode.
I first reviewed PaintCode last year. It offers a high-end resolution-independent design tool for transforming vector graphics into Objective-C code. In its latest incarnation, you can now import Photoshop files.
The new feature is a $19.99 in-app purchase on top of the $99.99 app, but if you'd like a sneak preview, you can download the demo version from the PaintCode website. The demo