Why doesn't my UISearchDisplayController fire the shouldReloadTableForSearchString method when I enter text in the search box?

I followed the Apple TableSearch example code but it doesn't work for me and I think I am doing things the way they did it. The method below should run whenever the user types something in the search box, but it never works for me, just in the sample app.

My header file has this implementation:

@interface ContactsTableVC : UITableViewController <UISearchDisplayDelegate, UISearchBarDelegate>{

      

        
        
        
      

    

I'm not sure what I'm missing or where else to look.

My NSLog is never called.

Thanks for the help!

    - (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchString:(NSString *)searchString searchScope:(NSInteger)searchOption
{
    NSLog(@"The shouldreloadtableforsearchstring method has been called!");
    [self filterContentForSearchText:searchString];

    // Return YES to cause the search result table view to be reloaded.
    return YES;
}