UITableView Move + Update

1-uitableview-simple-changes.swift

func animateChanges()
{
    tableView.moveRowAtIndexPath(NSIndexPath(forRow: 2, inSection: 0), toIndexPath: NSIndexPath(forRow: 0, inSection: 0))
    tableView.reloadRowsAtIndexPaths([NSIndexPath(forRow: 0, inSection: 0)], withRowAnimation: .Automatic)
}

2-tableview-error.swift

func animateChanges()
{
    tableView.beginUpdates()
    // ...
    tableView.moveRowAtIndexPath(NSIndexPath(forRow: 2, inSection: 0), toIndexPath: NSIndexPath(forRow: 0, inSection: 0))
    tableView.reloadRowsAtIndexPaths([NSIndexPath(forRow: 0, inSection: 0)], withRowAnimation: .Automatic)
    // ...
    tableView.endUpdates()
    
    // Results in Exception:
    //  Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Attempt to create two animations for cell'
}
    

3-tableview-workaround.swift

func animateChanges()
{
    tableView.beginUpdates()
    // ...
    tableView.moveRowAtIndexPath(NSIndexPath(forRow: 2, inSection: 0), toIndexPath: NSIndexPath(forRow: 0, inSection: 0))
    // ...
    tableView.endUpdates()
    
    tableView.reloadRowsAtIndexPaths([NSIndexPath(forRow: 0, inSection: 0)], withRowAnimation: .Automatic)
}

4-tableview-workaround-glitch.swift

func animateChanges()
{
    tableView.beginUpdates()
    // ...
    tableView.moveRowAtIndexPath(NSIndexPath(forRow: 2, inSection: 0), toIndexPath: NSIndexPath(forRow: 0, inSection: 0))
    // ...
    tableView.endUpdates()
    
    tableView.reloadRowsAtIndexPaths([NSIndexPath(forRow: 0, inSection: 0), NSIndexPath(forRow: 2, inSection: 0)], withRowAnimation: .Automatic)

    // Notice the resulting animation, no longer looks like smooth move
}

5-tableview-delayed-updates.swift

func animateChanges()
{
    CATransaction.begin()
    CATransaction.setCompletionBlock {
         self.tableView.reloadRowsAtIndexPaths([NSIndexPath(forRow: 0, inSection: 0), NSIndexPath(forRow: 2, inSection: 0)], withRowAnimation: .Automatic)
    }

    tableView.beginUpdates()
    // ...
    tableView.moveRowAtIndexPath(NSIndexPath(forRow: 2, inSection: 0), toIndexPath: NSIndexPath(forRow: 0, inSection: 0))
    // ...
    tableView.endUpdates()
    
    CATransaction.commit()
}

6-tableview-solution.swift

func animateChanges()
{
    tableView.beginUpdates()
    // ...
    tableView.moveRowAtIndexPath(NSIndexPath(forRow: 2, inSection: 0), toIndexPath: NSIndexPath(forRow: 0, inSection: 0))
    // ...
    tableView.endUpdates()
    
    tableView.beginUpdates()
    updateCellAtIndexPath(NSIndexPath(forRow: 0, inSection: 0))
    updateCellAtIndexPath(NSIndexPath(forRow: 2, inSection: 0))
    tableView.endUpdates()
}

func updateCellAtIndexPath(indexPath: NSIndexPath)
{
   var cell = tableView.cellForRowAtIndexPath(indexPath)
   cell.contentView.fadeTransition(0.3)
   configureCell(cell, atIndexPath:indexPath)
}

func configureCell(cell: UITableViewCell, atIndexPath indexPath: NSIndexPath)
{
   // ...
   cell.textLabel!.text = "Updated Text!"
   // ...
}

// MARK - UITableViewDataSource

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! UITableViewCell
    
    // to avoid duplicating code used to update cells
    configureCell(cell, atIndexPath:indexPath)
    return cell
}

// MARK - Extensions

// Taken from http://stackoverflow.com/a/27645516
extension UIView {    
    func fadeTransition(duration:CFTimeInterval) 
    {         
        let animation:CATransition = CATransition()         
        animation.timingFunction = CAMediaTimingFunction(name:kCAMediaTimingFunctionEaseInEaseOut)        
        animation.type = kCATransitionFade         
        animation.duration = duration         
        self.layer.addAnimation(animation, forKey: kCATransitionFade)     
    } 
}

http://www.matrixprojects.net/p/uitableview-moves-and-updates