UICollectionView effective drag and drop

This might help

https://github.com/lxcid/LXReorderableCollectionViewFlowLayout

This is extends the UICollectionView to allow each of the UICollectionViewCells to be rearranged manually by the user with a long touch (aka touch-and-hold). The user can drag the Cell to any other position in the collection and the other cells will reorder automatically. Thanks go to lxcid for this.

Here is an alternative:

The differences between DraggableCollectionView and LXReorderableCollectionViewFlowLayout are:

• The data source is only changed once. This means that while the user is dragging an item the cells are re-positioned without modifying the data source.
• It's written in such a way that makes it possible to use with custom layouts.
• It uses a CADisplayLink for smooth scrolling and animation.
• Animations are canceled less frequently while dragging. It feels more "natural".
• The protocol extends UICollectionViewDataSource with methods similar to UITableViewDataSource.

It's a work in progress. Multiple sections are now supported.

To use it with a custom layout see DraggableCollectionViewFlowLayout. Most of the logic exists in LSCollectionViewLayoutHelper. There is also an example in CircleLayoutDemo showing how to make Apple's CircleLayout example from WWDC 2012 work.