Vertical index for TableViewControllers

开发者_JAVA技巧It may be quite easy to do, but I can't find out how:

I want to add a vertical index in my sorted UITableViewController, like in the "Contacts" application. Any ideas?

Ok, I found how to make it. With a UILocalizedIndexedCollation, there is a sample in tableViewSuite.

I followed the source code, then it works perfectly.