Swift syntax-Swift instantiates objects by class name

Instantiate the object based on the class name. For example, create a ViewController instance based on a string of class names.

let controllerName = "SpainAppProto." + xibName // xibName is shaped like XXViewController
var classType: AnyObject.Type = NSClassFromString (controllerName)
var nsobjectype: UIViewController.Type = classType as UIViewController.Type
var viewController: UIViewController = nsobjectype (nibName: xibName, bundle: nil)
 

But when it is instantiated according to UIViewController.self, it needs to be converted slightly

     var x: String = m.debugDescription // m is UIViewController.self
     x = x.stringByReplacingOccurrencesOfString ("Optional (", withString: "")
     x = x.stringByReplacingOccurrencesOfString (")", withString: "")
     let anyClass: AnyClass = NSClassFromString (x)
     let viewControllerClass: UIViewController.Type = anyClass as UIViewController.Type
     let viewController = viewControllerClass ()
 

Swift syntax-Swift instantiates objects by class name