I know html and css and have created a few websites in the past. I usually design and code the UI, then hand that over to a developer, to add in the back-end coding. I'm now going to try producing an*iPhone app and I'm wondering if I could learn how to code the UI for it before I get someone else to do the 'real' programming. I know that iPhone apps use Cocoa and Objective-C but are those languages also used to create the UI? If no, what's used for that? Secondly, can you direct me to any examples of code for a UI of an iOS app?