Utility method to load viewController from storyboard programmatically assuming that the storyboard has the same prefix as the viewController

UIViewController+fromStoryboard.swift

import UIKit

extension UIViewController {
  
  static func fromStoryboard(_ controllerIdentifier: String? = nil) -> Self? {
    let name = String(describing: classForCoder())
    let suffix = "ViewController"
    let storyboardName = String(name.dropLast(suffix.count))
    
    let storyboard = UIStoryboard(name: storyboardName, bundle: nil)
    
    if let identifier = controllerIdentifier {
      return storyboard.instantiateViewController(identifier: identifier) as? Self
    } else {
      return storyboard.instantiateInitialViewController() as? Self
    }
  }
  
}