If you're looking into a serious reference check out iPhone App Development: The Missing Manual (<a href="http://www.amazon.com/iPhone-App-Development-Missing-Manual/dp/0596809778" rel="nofollow">http://www.amazon.com/iPhone-App-Development-Missing-Manual/...</a>). It covers so much and then some, it's truly the holy bible of iOS development work.<p>Otherwise try checking Google: <a href="http://www.google.com/search?q=develop+iphone+apps" rel="nofollow">http://www.google.com/search?q=develop+iphone+apps</a>
This is the best site I have found, <a href="http://developer.apple.com/devcenter/ios/index.action" rel="nofollow">http://developer.apple.com/devcenter/ios/index.action</a>