StoryboardManager.swift

public enum Storyboard: String {
    case Analytics, Dashboard, Reporting, Transactions
    
    var instance: UIStoryboard {
        return UIStoryboard(name: self.name, bundle: nil)
    }
    
    var name: String {
        return self.rawValue
    }
    
    public func viewController<T: UIViewController>(viewControllerClass: T.Type) -> T {
        let storyboardID = (viewControllerClass as UIViewController.Type).storyboardID
        return self.instance.instantiateViewController(withIdentifier: storyboardID) as! T
    }
    
    public func navigationController<T: UIViewController>(viewControllerClass: T.Type) -> UINavigationController {
        let storyboardID = (viewControllerClass as UIViewController.Type).storyboardID
        return self.instance.instantiateViewController(withIdentifier: storyboardID) as! UINavigationController
    }
    
    public func tabBarController<T: UIViewController>(viewControllerClass: T.Type) -> UITabBarController {
        let storyboardID = (viewControllerClass as UIViewController.Type).storyboardID
        return self.instance.instantiateViewController(withIdentifier: storyboardID) as! UITabBarController
    }
}