@IBAction func greenLikeClick(sender: AnyObject) {

    if let parentVC = self.parentViewController as? NewsController {
        parentVC.newslists[loadsection][loadrow].liked = false
    }
}

if let presenter = self.navigationController?.viewControllers[0] as? MainViewController {
        // access presenters members

}

if let presenter = self.presentingViewController?.children[0] as? MainViewController  {
        // access presenters members
}