Search bar xcode

Question

I have a new app for IOS where I'm parsing JSON and I'm using Search Bar. Parsing JSON works correctly, but I have problems with Search Bar, namely when I build my app and I want to search some words which were parsed I see nothing. Below I put my part of a code. I think a problem is with predicate :" predicateWithFormat:@"productName like[cd] %@", searchText];" Can anyone help me?

tableViewController.m

-(void)filterContentForSearchText:(NSString*)searchText scope:(NSString*)scope
{

    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"productName like[cd] %@", searchText];

    searchResults = [productsArray filteredArrayUsingPredicate:predicate];
}



-(BOOL)searchDisplayController:(UISearchDisplayController *)controller 
    shouldReloadTableForSearchString:(NSString *)searchString
{

    [self filterContentForSearchText:searchString
                           scope:[[self.searchDisplayController.searchBar scopeButtonTitles]
                                  objectAtIndex:[self.searchDisplayController.searchBar
                                                 selectedScopeButtonIndex]]]; 
    return YES;
}




-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{

    if (tableView == self.searchDisplayController.searchResultsTableView){
       return [searchResults count];  
    } else {
        return [productsArray count]; }
}


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

    static NSString *simpleTableIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
    Product *productObject;
    productObject = [productsArray objectAtIndex:indexPath.row];

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

    if (tableView == self.searchDisplayController.searchResultsTableView) 
    {
        cell.textLabel.text = [searchResults objectAtIndex:indexPath.row];
    }
    else
    {
        cell.textLabel.text = productObject.productName;
    }
    return cell;
}

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

    if (tableView == self.searchDisplayController.searchResultsTableView) {
        [self performSegueWithIdentifier: @"Cell" sender: self];
    }
}


-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    if ([segue.identifier isEqualToString:@"Cell"]) {

        DetailViewController *destViewController = segue.destinationViewController;



        if ([self.searchDisplayController isActive]) {

            NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
            indexPath = [self.searchDisplayController.searchResultsTableView indexPathForSelectedRow];
            destViewController.imageView = [searchResults objectAtIndex:indexPath.row];

        } else {

            //indexPath = [self.tableView indexPathForSelectedRow];

            NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
            Product * object =[productsArray objectAtIndex:indexPath.row];
            [[segue destinationViewController] getProduct: object];
            //destViewController.idLabel = [productsArray objectAtIndex:indexPath.row];
        }
    }
}

Answer 1

This issue is most likely with the predicate setup, as you suspect.

I'm using something like this for searching for matches in a list of contacts, perhaps it's a viable alternative:

[NSPredicate predicateWithBlock:^BOOL(Contact *contact, NSDictionary *bindings){
    return [contact.name rangeOfString:searchTerm options:NSCaseInsensitiveSearch].location != NSNotFound;
}];