Search Bar doesn't show the result

Question

I'm practicing on UISearch bar. It's supposed to show what it scopes, however I doesn't work. I connected search bar view controller to the original view controller. I checked the console (I put the NSLog to see if the NSPredicate works property), and it says the result, but not on the screen. Any advice please. Thanks:)

#import "ViewController.h" #import "detailViewController.h" // I realized it's not good practice. The first letter shold be the upper case

@interface ViewController ()
{
    NSMutableArray *_recipes;
    NSString *_recipeName;
    NSArray *_searchResults;
}
@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    self.tableView.delegate = self;
    self.tableView.dataSource = self;
    _recipes = [NSMutableArray arrayWithObjects:@"Egg Benedict",@"Mushroom Risotto",@"Full Breakfast", @"Hamburger",@"Ham and Egg Sandwich", @"Cream Brelee",@"White Chocolate Donut",@"Starbucks Coffee",@"Vegetable Curry", @"Instant Noodle With Egg",@"Noodle with BBQ Pork", @"Japanese Noodle with Pork",@"Green Tea", @"Thai shripm Cake", @"Angry Birds Cake",@"Ham and Cheese Panini",nil];

}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

# pragma mark Dlegate method

// Data source protocol

- (NSInteger)tableView:(UITableView *)tableview numberOfRowsInSection:(NSInteger)section
{
    if(self.tableView == self.searchDisplayController.searchResultsTableView)
    {
        return [_searchResults count];
    }
    else
    {
        return [_recipes count];
    }
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

    NSString *simpleTableIdentifier = @"RecipeCell";

    UITableViewCell *cell = [self.tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];

    if (cell == nil)
    {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
    }


    if(self.tableView == self.searchDisplayController.searchResultsTableView)
        {
            cell.textLabel.text = _searchResults[indexPath.row];
        }
        else
        {
            cell.textLabel.text = _recipes[indexPath.row];
        }


    return cell;

}

// Delegate Protocol


- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSLog(@"row %i and section %i",indexPath.row,indexPath.section);
    _recipeName = _recipes[indexPath.row];

    [self performSegueWithIdentifier:@"CellSelectionSegue" sender:self];


}

# pragma mark Segue method

-(void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    NSLog(@"segue");

    detailViewController *detailVC = segue.destinationViewController;
    detailVC.string = _recipeName;
    NSLog(@"%@",_recipeName);


}

# pragma mark Searchbar datasource

- (void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{
    NSPredicate *resultPredicate = [NSPredicate
                                    predicateWithFormat:@"SELF contains[cd] %@",
                                    searchText];

    _searchResults = (NSArray *)[_recipes filteredArrayUsingPredicate:resultPredicate];

    NSLog(@"%@",_searchResults);
}

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

    return YES;
}

@end

Answer 1

Have you set the delegates for the SearchDisplayController ?

self.searchDisplayController.searchResultsDelegate = self;
self.searchDisplayController.searchResultsDataSource = self;
self.searchDisplayController.delegate = self;

Edit:

I'll edit my comment into here. I believe the references for

if (self.tableView == self.searchDisplayController.searchResultsTableView)

should be

if (tableView == self.searchDisplayController.searchResultsTableView)

The reason is self.tableView will never be the SearchDisplayController because when initiating the search it actually creates a new UITableViewController on top of the original.

Answer 2

There is one more delegate method in search . Try adding that to your project. Here is the code:

- (BOOL)searchDisplayController:(UISearchDisplayController *)controller shouldReloadTableForSearchScope:(NSInteger)searchOption
{
    [self filterContentForSearchText:self.searchDisplayController.searchBar.text 
                               scope:[[self.searchDisplayController.searchBar scopeButtonTitles] objectAtIndex:searchOption]];
    return YES;
}