ViewController.swift

class ViewController:UIViewController, KeyboardObserver{
  
  //@IBOutlet weak var scrollViewOutlet:UIScrollView!
  
  var container:UIView{
    return self.view  
    //If container is a scrollview, create an outlet for scrollview and return it like below
    //return self.scrollViewOutlet
  }
  
  //Register for Keyboard Notifications
   override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        KeyboardNotifications(shouldRegister: true)
   }
  
  //Deregister for keyboard Notifications
   override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        KeyboardNotifications(shouldRegister: false)
   }
}