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Core Data tutorial part 4.2 / 5 - Using NSFetchedResultsController, Reorder TableViewCells with LongPressGesture

In this Core Data Tutorial, we do very important and useful things: First we set NSFetchedResultsController, and do changes in the code, create displayOrder attribute.With LongPressGestureRecognizer we can reorder TableViewCells and update Core Data cells with displayOrder attribute, which saved immediately in Core Data.

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