Is it possible to create an index (using UILocalizedIndexedCollation or otherwise) other than A-Z for a table view, e.g., change the A-Z vertical bar on the right of a table view to 1st, 2nd, 3rd.
Yes it is possible..
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView
is method where you declaring what to show on the section index. i.e. on the right of the table.
- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index
is the method where you handling touch events.. so you can match with the section title you have given in first method and use it to make decisions.