batched polling

gistfile1.m

#pragma mark - View life cycle

- (void)viewDidLoad {
    [super viewDidLoad];

    [_collectionView registerClass:[JSMRefreshViewCell class] forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:@"SearchViewRefresh"];
}

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForFooterInSection:(NSInteger)section {
    // If we have more results to fetch
    if( _resultsCount > _results.count ) {
        return CGSizeMake( collectionView.frame.size.width, 60 );
    }

    // Otherwise, return zero size
    return CGSizeZero;
}

- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath {
    // Ask for more results
    [self moreSearch];

    // Return the cell
    JSMRefreshViewCell *view = (JSMRefreshViewCell *)[collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:@"SearchViewRefresh" forIndexPath:indexPath];
    return view;
}