I want create an accordion control similar to one created using AJAX <a href="http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/Accordion/Accordion.aspx" rel="nofollow">http://www.asp.net/ajaxLibrary/AjaxControlToolkitSampleSite/Accordion/Accordion.aspx</a> where I can place icons instead of text for iPhone.Answer1:
Basically you want to use an expandable
UITableView - when you tap a cell you reveal a number of cells beneath it (the contents of your accordion). You don't <em>necessarily</em> need to use a table view, but typically it's a good starting point.
There are a couple of controllers that have been put out in the open - <a href="http://cocoacontrols.com/platforms/ios/controls/uiexpandabletableview" rel="nofollow">this one, for example</a> - but it's not too difficult to write yourself once you know a bit about table views and removing/adding cells.