I've read several articles, tuturials, etc for compiling for iOS and xCode, but there doesn't seem to be anything definitive. Is Phonegap even required for an iOS native build? Or can I just set the build to native? Is there anything else required in order to use xCode and the simulators? At this point, my app isn't really requiring any of the API's that iOS has like contacts, gps, etc.
So I really only need phoneGap if I want to extend the app to leverage those API's? Or does compiling in native format with Sencha also give me this functionality?
If you build in native it will give you the same functionality. Phonegap is just a 3rd party that enables the same functionality, I think. I've used Phonegap in the past but it seemed too complicated to implement.