Keyboard2

Keyboard2.swift

func registerKeyboardNotifications() {
    NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillChangeFrame(_:)), name: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil)
}

@objc func keyboardWillChangeFrame(_ notification: Foundation.Notification) {
    guard let userInfo = notification.userInfo else {
        return
    }
	
    let offset = UIScreen.main.bounds.height - (userInfo[UIKeyboardFrameEndUserInfoKey] as AnyObject).cgRectValue.minY
  
     // Update your view…
}

// Oh and don't forget:
func deregisterKeyboardNotifications() {
    NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIKeyboardWillChangeFrame, object: nil)
}