instantiateViewController.swift

import UIKit

enum AppStoryboard : String{
  case Main = "Main"
  case PreLogin = "Payment"
  var instance : UIStoryboard {
    return UIStoryboard(name: self.rawValue, bundle: Bundle.main)
  }
  func viewController<T>(vc : T.Type) -> T where T: UIViewController{
    let identifier = String(describing: T.self)
    return self.instance.instantiateViewController(withIdentifier:identifier) as! T
  }
}

usage
guard let vc = AppStoryboard.Main.viewController(vc: HomeVC.self) as? HomeVC else{return UIViewController()}