Shadowed cells in UICollectionView

shadowedcells.m

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"productCell" forIndexPath:indexPath];
    
    CALayer* layer = cell.layer;
    
    [layer setMasksToBounds:NO];
    [layer setShadowColor:[UIColor blackColor].CGColor];
    [layer setShadowOffset:CGSizeMake(0.0f, 5.0f)];
    [layer setShadowOpacity:0.3f];
    [layer setShadowRadius:4.0f];
    
    return cell;
}