Add tab bar navigation bar in Window based application iPhone

Hi guys
I am new to iphone app development. I want to develop a application which contains tab bar ,navigation bar & middle part of view contains UIImageView.
When my application will launch it will show main view .On main view I want to add Loading view for connecting to server which contains text (Connecting.. & so on) & activity indicator, like this view pointed by red arrow =>
http://img10.imageshack.us/i/16467623.jpg/
How can I add this view?
My app contains 4 tabs on main view in which last tab is more.
I completed tab bar part using tab bar controller as rootViewController .
How to add navigation bar ? I want navigation bar for whole app.
I mean to say when i select first tab new view will appear ,select 2nd tab => new view & so on. I want navigation bar & back button for all tabs so that I can return to my main screen containing all 4 tabs .
Also i want to hide my tab bar when i select tab bar item & animated to new view.
Please help me guys. Any links to tutorial , code or video is more helpful...
Thanks in advance.