NSFetchedResultsController can't scroll while table updating

Question

I have a tableView with NSFetchedResultsController that listen for item updates.

func controllerWillChangeContent(controller: NSFetchedResultsController) {
        self.tableView.beginUpdates()
    }

 func controller(controller: NSFetchedResultsController, didChangeObject anObject: AnyObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?) {

        switch type {
            case .Insert:
                if let _newIndexPath = newIndexPath {
                    self.tableView.insertRowsAtIndexPaths([_newIndexPath], withRowAnimation: .None)
                }
            case .Delete:
                if let _indexPath = indexPath {
                    self.tableView.deleteRowsAtIndexPaths([_indexPath], withRowAnimation: .None)
                }
            case .Update:
                if let _indexPath = indexPath {
                    self.tableView.reloadRowsAtIndexPaths([_indexPath], withRowAnimation: .None)
                }
            default:
                self.tableView.reloadData()
        }

        self.items = controller.fetchedObjects as! [Item]
    }

func controllerDidChangeContent(controller: NSFetchedResultsController) {
        self.tableView.endUpdates()
    }

When user add item i update it in database every 1-2 seconds and i can't scroll down, because controller refresh item and scroll me to top.

Answer 1

I found problem. It is because i use:

self.tableView.rowHeight = UITableViewAutomaticDimension

Thanks for this answer: UITableView bouncing back to the top of a section when calling reloadRowsAtIndexPaths