Create UIViewController from storyboard and pass parameter safely.

playground.swift

class UserListViewController: UIViewController {
    func presentUserProfile(userId: String) {
        let vc = UserProfileViewControllerFactory.create(userId: "xxxxx")
        self.present(vc, animated: true, completion: nil)
    }
}

StoryboardInstantiatable.swift

public protocol StoryboardInstantiatable {
    static var storyboardName: String { get }
    static var viewControllerIdentifier: String? { get }
    static var bundle: Bundle? { get }
}

public extension StoryboardInstantiatable where Self: UIViewController {
    public static var storyboardName: String {
        return String(describing: self)
    }
    
    public static var viewControllerIdentifier: String? {
        return nil
    }
    
    public static var bundle: Bundle? {
        return nil
    }
    
    public static func instantiate() -> Self {
        let loadViewController = { () -> UIViewController? in
            let storyboard = UIStoryboard(name: storyboardName, bundle: bundle)
            if let viewControllerIdentifier = viewControllerIdentifier {
                return storyboard.instantiateViewController(withIdentifier: viewControllerIdentifier)
            } else {
                return storyboard.instantiateInitialViewController()
            }
        }
        
        guard let viewController = loadViewController() as? Self else {
            fatalError()
        }
        return viewController
    }
}

UserProfileViewController.swift

struct UserProfileViewControllerFactory {
    private init() {}
    static func create(userId: String) -> UserProfileViewController {
        let vc = UserProfileViewController.instantiate()
        vc.userId = userId
        return vc
    }
}

class UserProfileViewController: UIViewController {
    
    fileprivate var userId: String!
    override func viewDidLoad() {
        super.viewDidLoad()
        print(userId)
    }
    
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
}

extension UserProfileViewController: StoryboardInstantiatable {}

You can now invoke a custom initializer from a creation block that's passed through instantiateInitialViewController(creator:) or instantiateViewController(identifier:creator:). This makes it possible for you to initialize view controllers with additional context and arguments, while taking advantage of defining them in a storyboard through Interface Builder. A custom controller initializer must call its super.init(coder:) method and pass the coder argument that it receives through the creation block. (48313869)