Error: UITableView jump to top with UITableViewAut

Question

I am using UITableView with estimatedRowHeight and UITableViewAutomaticDimension. Also I am using NSFetchedResultsControllerDelegate to reflect the changes.

Everything is work fine. Now the problem is when ever I add some record to CoreData, NSFetchedResultsController called the it's delegate but an unexpected things happen. TableView suddenly scroll to Top every time.

NSFetchedResultsControllerDelegate

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

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

func controller(controller: NSFetchedResultsController, didChangeObject anObject: AnyObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?) {
        switch type {
        case .Insert:
            tableView.insertRowsAtIndexPaths([newIndexPath!], withRowAnimation: .None)
            break

        case .Update:
            tableView.reloadRowsAtIndexPaths([indexPath!], withRowAnimation: .None)
            break

        case .Delete:
            tableView.deleteRowsAtIndexPaths([indexPath!], withRowAnimation: .None)
            break

        default: break;
        }
    }

By googling I found few answers where people suggested to use tableView: heightForRowAtIndexPath: but as my cell height is dynamic. So what should I do?

Answer 1

func viewWillDisappear(animated: Bool) {
    super.viewWillDisappear(animated)
    tabelView.reloadData()
}

this is work for me