Any good contacts app enables users to remove contacts. The previous version of Hello-Contacts used a swipe gesture on a table view cell to delete a cell. Swiping a cell made a button appear that the user could tap and the corresponding UITableViewDelegate method was called.
Unfortunately, UICollectionViewDelegate does not specify a similar delegate method for deleting cells. This means that you'll need to do a little more work to implement cell deletion for a collection view. A very simple implementation would be to have the user long-press on a cell, ask them whether they want to delete the contact, and reload the collection view if needed. This would work but the deleted contact would quickly disappear, and ...
