Delivering In-App Purchase Content via Server

My iPhone app will be a free app but for some special content, users need to buy.

For example I have 4 files for free and if the user want to buy another file he has to purchase it. I am sure that I need to use Server Product Model to deliver the content.

What I want to know is: how will content be delive开发者_如何学Pythonred to the application?

for this u got very good tutorial on http://www.youtube.com/watch?v=xGDGO5P95Dg

in this application tutorial show how to download files and store in our application...

may be this is useful to you..

You have to go for in-app purchase. This link will help you.

In-App Purchase without using iTunes Connect?