Book Shelf view -Reorder the shelves(Sections)

[nambi86]

First Thanks for the great post. I have created the book shelf view(similar to iBooks) using collection view.Now i am trying to swap/re-order the shelf just like tableview reordering of cells. i.e when I pick a shelf and reorder it, the shelf should move up and down. Is there any way to achieve this effort?. Please suggest me. Thank you in advance.