How to implement type ahead functionality for UIsearchbar in ipad

I have to implement 开发者_高级运维the type ahead functionality for a search bar in ipad. whether such functionality is by default provided by any search bar delegate or how to implement it??

As I know this functionality is not provided by default, and you should do it by yourself. If you use tableView to display search results you should override searchBar:textDidChange: method of UISearchBar delegate. Something like this:

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
    [self setSearchString:searchText];
    [self.searchResultsTable reloadData];
}