How to design IPhone application interface?

I am new with xcode. I want to create a simple interface in xcode like the above link http://i52.tinypic.com/2ah8k7o.png. Now i am not understanding what xcode objects should i use and how can i use them. I am working on xcode 4.0.2

Please guide. Any code or web url would be appreciated.

Its a grid view. Try AQGridView. The project demo is explanatory. You have to study it and customise according to your requirments.

You should read iOS Human Interface Guidelines : http://developer.apple.com/library/ios/documentation/userexperience/conceptual/mobilehig/MobileHIG.pdf