Very simple implementation of drag&drop stack view.
A cells of UITableView can be rearranged by drag and drop.
HWPanModal is used to present controller and drag to dismiss.
PullToReach is a simple drag-and-drop solution for implementing the pull-to-reach functionality seen in the music app Soor by Tanmay.
`StackedCollectionView` is a `UICollectionViewFlowLayout` subclass written in Swift to provide drag-and-drop interactions within a `UICollectionView`.