Swift3.0キーボードのイジェクトと回収を監視

 override func viewDidLoad() {
        super.viewDidLoad()

        NotificationCenter.default.addObserver(self, selector: #selector(keyBoardWillShow(_:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(keyBoardWillHide(_:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
    }

 deinit {
  //    
  NotificationCenter.default.removeObserver(self)
    }

 //     
    func keyBoardWillShow(_ notification: Notification){
        //  userInfo
        let kbInfo = notification.userInfo
        //     size
        let kbRect = (kbInfo?[UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
        //   y   
        let changeY = kbRect.origin.y - SCREEN_HEIGHT
        //       
        let duration = kbInfo?[UIKeyboardAnimationDurationUserInfoKey] as! Double

       //      
        UIView.animate(withDuration: duration) {

            self.aTableView.transform = CGAffineTransform(translationX: 0, y: changeY)
        }
    }

    //     
    func keyBoardWillHide(_ notification: Notification){

        let kbInfo = notification.userInfo
        let kbRect = (kbInfo?[UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
        let changeY = kbRect.origin.y
        let duration = kbInfo?[UIKeyboardAnimationDurationUserInfoKey] as! Double

        UIView.animate(withDuration: duration) {
           self.tableViewConstraint.update(inset: 0)
        }
    }