How can I link a button with a RSS Feed??

[PCobolton]

Hi,
I want to make an app (for iPhone/iPod touch/iPad, with iOS) just with 5 Buttons at the bottom. And each button should be linked with a rss feed, e.g. one Twitter-Button, and when you click it, my newest tweets appear on the display, etc. I want to use XCode for that.

my question is, how can i link a button with a rss feed with XCode?? i would do the same with some other buttons, but it would be enough, if just the RSS Feed opens sorry, i'm new with XCode, and i've never programmed a App yet...

Thx for replying

Btw: I'm German, so please forgive me possible mistakes