How to enable swipe to delete cell in a TableView?

Question

I have a UIViewController that implements TableViews delegate and datasource protocols. Now I want to add \"swipe to delete\" gesture to cells.

Answer 1

If you are using an NSFetchedResultsControllerDelegate to populate the table view, this worked for me:

• Make sure tableView:canEditRowAtIndexPath returns true always

• In your tableView:commitEditingStyle:forRowAtIndexPath implementation, do not delete the row directly from the table view. Instead, delete it using your managed object context, e.g.:

  if editingStyle == UITableViewCellEditingStyle.Delete {
      let word = self.fetchedResultsController.objectAtIndexPath(indexPath) as! Word
      self.managedObjectContext.deleteObject(word)
      self.saveManagedObjectContext()
  }
  
  func saveManagedObjectContext() {
      do {
          try self.managedObjectContext.save()
      } catch {
          let saveError = error as NSError
          print("\(saveError), \(saveError.userInfo)")
      }
  }