how to run the iphone apps in the back ground [duplicate]

This question already has answers here: 开发者_运维知识库 Closed 11 years ago.

Possible Duplicate:

How to implement Daemon process for background task in iphone sdk 3.0 ?

hii every one

how to run the iphone apps in the back ground, can any buddy give me some example codes ,,

thanx in advance

---

You should have done some research before, but here you go:

• iPhone app in the background
• How to implement Daemon process for background task in iphone sdk 3.0?
• iPhone App - Generate Alert Popups when App is Closed
• Is there any system level background queue process in iPhone?
• push notification - background process - iPhone

Reference how to run my application in background in iphone?

---

Not to mention iOS Application Programming Guide Executing Code in the Background

---

Follow the official guide from Apple.