AppsTitude

protocol ViewModelInputs {
  var buttonTapped: AnyObserver<Void> { get }
}

protocol ViewModelOutputs {
  var showLoginErrorMessage: Driver<String> { get }
}

protocol ViewModelIO {
  var inputs: ViewModelInputs { get }

AppsTitude

// I just implemented that with Swift. So I would like to share my implementation.
// First initialise an array of NSBlockOperations:
        var blockOperations: [NSBlockOperation] = []

    
// In the did change object method:
        func controller(controller: NSFetchedResultsController, didChangeObject anObject: AnyObject, atIndexPath indexPath: NSIndexPath?, forChangeType type: NSFetchedResultsChangeType, newIndexPath: NSIndexPath?) {
        
        if type == NSFetchedResultsChangeType.Insert {
            println("Insert Object: \(newIndexPath)")