important url for iPhone

1- http://www.iphonesdkarticles.com/2009/01/uitableview-indexed-table-view.html

2-http://epiicdream.wordpress.com/2012/02/27/ios-sdk-savingretrieving-data-using-nsuserdefaults/

3-http://www.mindfiresolutions.com/Merging-Two-Videos--iPhoneiPad-Tip--1396.php