[viewController from Storyboard] #uiviewcontroller #swift3 #extension

UIViewControllerExtension.swift

import UIKit

extension UIViewController {
  
   func viewController(withStoryBoardname storyBoardName : String) -> UIViewController? {
    
    let storyboard = UIStoryboard(name: storyBoardName, bundle: .main)
    let controller = storyboard.instantiateInitialViewController()
    return controller
  }
  
   func viewController(withStoryBoardname storyBoardName : String , contollerID : String) -> UIViewController? {
    
    let storyboard = UIStoryboard(name: storyBoardName, bundle: .main)
    let controller = storyboard.instantiateViewController(withIdentifier: contollerID)
    return controller
  }
  
}