How to edit/modify contacts of address book using iphone sdk?

I have read contacts from Address Book and display the list of contacts. By clicking any contact user can view its whole details, and all is working fine. Now i want to give "Edit" functionality to my users, i do not get the way to do it? Plz help via coding example? Here is some m开发者_如何学Goore detail: i have 3 buttons, one to show contacts, second to edit and third named "save" to save edited changes against that contact.

Bundle of Thanks

Read addressbook programming guide. Here is a tutorial to get the address book contacts

http://iphone.zcentric.com/2008/09/19/access-the-address-book/

here is a sample on apple site see if it works for you

https://developer.apple.com/library/ios/#samplecode/QuickContacts/Introduction/Intro.html#//apple_ref/doc/uid/DTS40009475