Easy to create ViewController

ClassName.swift

import Foundation

protocol ClassNameProtocol {
    static var className: String { get }
    var className: String { get }
}

extension ClassNameProtocol {
    static var className: String {
        return String(describing: self)
    }

    var className: String {
        return type(of: self).className
    }
}

extension NSObject: ClassNameProtocol {}

UIViewControllerCreater.swift

import UIKit

protocol UIViewControllerCreator {
    static func viewController() -> Self?
    static var bundleName: String? { get }
    static var storyboardName: String? { get }
    static var nibName: String? { get }
}

extension UIViewControllerCreator where Self: UIViewController {
    static func viewController() -> Self? {

        var bundle: Bundle? = nil
        if bundleName != nil {
            bundle = Bundle.init(identifier: bundleName!)
        }

        if let sbName = storyboardName {
            let sb = UIStoryboard.init(name: sbName, bundle: bundle)
            // Just lookup identifier from className
            return sb.instantiateViewController(withIdentifier: Self.className) as? Self
        }
        else if let nibName = nibName {
            return UIViewController.init(nibName: nibName, bundle: bundle) as? Self
        }

        return nil
    }

    static var bundleName: String? {
        return nil
    }

    static var storyboardName: String? {
        return nil
    }

    static var nibName: String? {
        return nil
    }
}