How to read/scan Barcode?

how can I be able to implement read/scan bar code in my iphone applicatio开发者_如何学JAVAn. I also would like to know how to implement it into the iphone application. If possible suggest me the links and example source code and applications to understand how it works.

I'm using the Zbar framework that is available here

http://zbar.sourceforge.net/

Check out the documentation it is well explained on how to implement it

edited: tutorial for implement Zbar: http://zbar.sourceforge.net/iphone/sdkdoc/tutorial.html