Five Signs of Code Smell in Swift - 2

five-signs-of-code-smell-in-swift-2.swift

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == addItemViewController {
        if let navigationController = segue.destinationViewController as? UINavigationController,
           let addItemViewController = navigationController.viewControllers.first as? AddItemViewController {
                addItemViewController.delegate = self
        }
    }
}