This is very helpful, if you want to use search functionality on UITableView.

Code for ViewController.h

@interface  ViewController : UIViewController<UISearchBarDelegate,UITableViewDataSource,UITableViewDelegate,UISearchDisplayDelegate>{

    IBOutlet UISearchBar *telepathySearch;
    IBOutlet UITableView *telepathyTable;

}

@property (nonatomic, weak) NSMutableArray *searchResults;
@property (nonatomic, weak) NSMutableArray *tableData;

Code for ViewController.m

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
    [self.searchResults removeAllObjects];

    NSPredicate *resultPredicate = [NSPredicate
                                    predicateWithFormat:@"SELF contains[cd] %@",
                                    searchText];

    self.searchResults = [NSMutableArray arrayWithArray:[self.tableData filteredArrayUsingPredicate:resultPredicate]];
}

-(BOOL)searchDisplayController:(UISearchDisplayController *)controller
shouldReloadTableForSearchString:(NSString *)searchString
{
    [self filterContentForSearchText:searchString
                               scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
                                      objectAtIndex:[self.searchDisplayController.searchBar
                                                     selectedScopeButtonIndex]]];

    return YES;
}