iOS - UICollectionView spacing still there when set to 0 - How to set with no spacing between cells

Question

I have a simple UICollectionView which I have set with 0 spacing in InterfaceBuilder but when I populate the collection view with cells there is still some spacing. Is there something special and not immediately obvious that I need to do in order to actually see a collectionview cell with 0 spacing beyond setting it to have 0 spacing? Thanks.

EDIT* some code:

- (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath {

    UICollectionViewCell *cell = [cv dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];

    cell.backgroundColor = [UIColor clearColor];

    UILabel *lbl = [[UILabel alloc] initWithFrame:CGRectMake(2, 2, cell.frame.size.width -4, cell.frame.size.height -4)];
    lbl.backgroundColor = [UIColor clearColor];
    lbl.font = [UIFont boldSystemFontOfSize:20];
    lbl.text = [NSString stringWithFormat:@"$%0.0f", [[amountsArray objectAtIndex:indexPath.row] floatValue]];
    lbl.textAlignment = NSTextAlignmentCenter;
    lbl.layer.borderWidth = 1;

    [cell addSubview:lbl];
    [lbl release];

    return cell;
}

Answer 1

Simple solution for your Query. Add this in your viewController's .m file:

-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    ProductDetailViewController *HomeVC = [self.storyboard instantiateViewControllerWithIdentifier:@"ProductDetailView"];
    HomeVC.title = @"DemoProject";
    [self.navigationController pushViewController:HomeVC animated:YES];
}

- (UIEdgeInsets)collectionView:(UICollectionView*)collectionView layout:(UICollectionViewLayout *)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
    return UIEdgeInsetsMake(0, 0, 0, 0); // top, left, bottom, right
}

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section {

    return 0.0;
}

- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section {
    return 0.0;
}