A simple way to move the screen up when the keyboard is apparent

movekeyboardup.swift

    
    // Make sure you add the observer.
    
    func addObserverToKeyboard(){
        NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: NSNotification.Name.UIKeyboardWillShow, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: NSNotification.Name.UIKeyboardWillHide, object: nil)
    }
    
    
    func keyboardWillShow(notification: NSNotification) {
                if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
                    self.view.frame.origin.y -= keyboardSize.height
                }
    }
    
    func keyboardWillHide(notification: NSNotification) {
                if let keyboardSize = (notification.userInfo?[UIKeyboardFrameBeginUserInfoKey] as? NSValue)?.cgRectValue {
                    self.view.frame.origin.y += keyboardSize.height
                }
    }