CODEWITHSUNDEEP
iphoneobjective-cdelegates
acecapades
acecapades

Reputation: 895

My delegate doesn't work

I'm working on an app that has a shopping cart. When I add a product in my shopping cart, my button segues to a table view controller modally. Then when I select a row, the modal view controller should be dismissed. I tried to implement this using my delegate. Here's my code:

(irrelevant code omitted)

ItemsTableViewController (the list of products to choose from)

//the header file
@class ItemsTableViewController;

@protocol ItemsTableViewControllerDelegate <NSObject>

- (void) itemsTableViewController: (ItemsTableViewController *)sender
                 didSelectProduct: (Product *) aProduct;

@end

@interface ItemsTableViewController : CoreDataTableViewController

@property (nonatomic, strong) UIManagedDocument *itemDatabase;

@property (nonatomic, weak) id <ItemsTableViewControllerDelegate> delegate;

@end

//snippets from the implementation

- (void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    Product *item = [self.fetchedResultsController objectAtIndexPath:indexPath];

    [self.delegate itemsTableViewController:self didSelectProduct:item];
    NSLog(@"DID SELECT ROW AT index %d with name %@", indexPath.row, item.name);

}

//here's my shopping cart, the ItemsTableViewController delegate

- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    if ([segue.identifier isEqualToString:@"Show Products List"]){
        ItemsTableViewController *itemsTVC = (ItemsTableViewController *)segue.destinationViewController;
        itemsTVC.delegate = self;

    }
}
- (void) itemsTableViewController:(ItemsTableViewController *)sender didSelectProduct:(Product *)aProduct{
    //adds the product in the shopping cart
    [self.shoppingCart addObject:aProduct];
    [self.products reloadData];
    [self dismissModalViewControllerAnimated:YES];
    NSLog(@"from the delegate got product %@", aProduct.name);
}

Upvotes: 0

Views: 390

Answers (1)

rob mayoff
rob mayoff

Reputation: 385500

The destination of your segue is a UINavigationController, not an ItemsTableViewController. Perhaps you put your ItemsTableViewController inside a UINavigationController on your storyboard. Try this:

UINavigationController *navController = segue.destinationViewController;
ItemsTableViewController *itemsTVC = (ItemsTableViewController *)navController.topViewController;
itemsTVC.delegate = self;

Upvotes: 1

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