UIViewController+Storyboard

//
//  UIViewController+Storyboard.swift
//  Temi Svolti
//
//  Created by Eugenio Baglieri on 10/11/15.
//  Copyright © 2015 Eugenio Baglieri. All rights reserved.
//

import UIKit

protocol StoryboardIdentifiable {
    
    static var storyboardIdentifier: String {get}
    
}

extension UIViewController: StoryboardIdentifiable {
    
    static var storyboardIdentifier: String {
        let classString = NSStringFromClass(self)
        let components = classString.componentsSeparatedByString(".")
        assert(components.count > 0, "Failed extract class name from \(classString)")
        return components.last!
    }
    
}

extension UIViewController {
    
    class func instantiateFromStoryboard<T: UIViewController>(storyboard: UIStoryboard) -> T {
        return storyboard.instantiateViewControllerWithIdentifier(T.storyboardIdentifier) as! T
    }
    
}