iOS: search bar with table view

// assuming table view is done
VC .h

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

{

    // ADDED

    NSMutableArray *tableData;

    NSArray *array;

    NSMutableArray *searchResults;

    

    IBOutlet UITableView *tableView;

}

@property (nonatomic, retain) NSArray *array;

@end

// assuming table view is done

VC .m

// ADDED: to search

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText

{

    NSLog(@"searching: %@", searchText);

    searchText = [searchText lowercaseString];

    // search for text in array

    if(searchText.length > 0)

    {

        [tableData removeAllObjects];// clear all data

        [searchResults removeAllObjects];

        for (NSString *ostr in array)

        {

            //NSLog(@"looping: %@", str);

            NSString *str = [ostr lowercaseString];

            NSRange range = [str rangeOfString:searchText];

            if(range.location != NSNotFound)

            {

                NSLog(@"matched: %@", searchText);

                [searchResults addObject:ostr];

            }

        }

        //[tableData removeAllObjects];

        [tableData addObjectsFromArray:searchResults];

        [tableView reloadData];

    }

    else

    {

        [tableData removeAllObjects];// clear all data

        [tableData addObjectsFromArray:array];

        [tableView reloadData];

    }

}

- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar

{

    NSLog(@"Cancel Button Clicked");

    [searchBar resignFirstResponder]; // close keyboard

}

- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar

{

    NSLog(@"Search Button Clicked");

    [searchBar resignFirstResponder]; // close keyboard

}

- (void)viewDidLoad

{

    [super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

    tableView.delegate = self;

    tableView.dataSource = self;

    

    // ADDED

    self.array = [NSArray arrayWithObjects:@"Beng", @"Seng", @"Lian", @"Beng2", @"Seng2", @"Lian2", nil];

    // must alloc and init. strange. cannot use arrayWithArray

    tableData = [[NSMutableArray alloc] init]; //[NSMutableArray arrayWithArray:self.array];

    searchResults = [[NSMutableArray alloc] init];//[NSMutableArray arrayWithArray:self.array];

    [tableData addObjectsFromArray:self.array];

    

    UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, tableView.frame.size.width,  0)];

    [searchBar sizeToFit];

    searchBar.delegate = self;

    [searchBar setShowsCancelButton:YES animated:YES];

    //[searchBar showsSearchResultsButton];

    [self.view addSubview:searchBar];

    

    // place tableview just below search bar. else, the first row of the table view will be hidden behind search bar

    // hence adjust the y and height in the (x,y,w,h) of the table view's frame

    [tableView setFrame:CGRectMake(0, searchBar.frame.size.height, tableView.frame.size.width, tableView.frame.size.height - searchBar.frame.size.height)];

}