iPhone:How to implement Push Notification in iPhone like facebook?

I want to implement push notification functionality in my apps like Facebook开发者_Python百科 provide us so please tell me any link or any idea to develop this functionality.

---

You can implement Push notification using : http://urbanairship.com/

This are the steps you need to follow : http://urbanairship.com/docs/push_index.html (Example is also available)

Its very easy to implement.