iPhone multi view application design question

I have a question about iPhone app design approach... I have in mind to make some complex application and I think that the best base for my needs is "Tab Bar Application" template. Actually, I've been looking some apps on iPhone, and AppStore's design is definitely what I need; a Tab Bar based app with different options on the top - Segmented Control, Search Bar, Navigation Bar etc. Each of Tab Bar's views would have another 'navigation-based app' or 'utility application' inside of it...

I spent lots of time on searching for my 'problem' but I still can't comprehend how to 'nest' few navigation controls in one application... Really, any link or thought would be extremely appreciated! Even your mind flow about how to accomplish what I need is nice because I'm totally tapping in dark here...

Just to mention that I'm pretty much new in Objective-C and I've heard something about Delegations but I don't know exactly how to use that... Is that something that would help me build my idea开发者_开发技巧?

Thank you very very much for your time!

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The View Controller Programming Guide has a section on doing what you're thinking. The link gives a conceptual overview of how the application is laid out and gives code samples on how to do it.