获取当前显示的UITableViewCell
UICollectionView *ta = (UICollectionView *)scrollView;
NSArray *Vells = [ta visibleCells];
NSIndexPath *dex = [ta indexPathForCell:Vells[0]];
table 同上
UICollectionView *ta = (UICollectionView *)scrollView;
NSArray *Vells = [ta visibleCells];
NSIndexPath *dex = [ta indexPathForCell:Vells[0]];
table 同上