Enabling drag and drop in collection views is one of the challenging and yet rewarding aspects of developing iOS collections views. Above all, ability allows us to provide to our users a wide range of user interface interactions such as choosing objects (text, image, etc) from different containers. Furthermore, users can also user this feature to sort items in any collection view.
Collection Views Drag and Drop in practice
Summary
To sum up, drag and Drop is a powerful structure for developing advanced iOS applications. While there are many memory related concerns, iOS takes care of most of those for us.
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