Animate on keyboard show and dismiss

keyboard.swift

override func viewDidLoad() {
  // ...
  Utils.registerForNotification(self, selector: #selector(MyViewController.keyboardShow(_:)), name: NSNotification.Name.UIKeyboardWillShow.rawValue)
  Utils.registerForNotification(self, selector: #selector(MyViewController.keyboardHide(_:)), name: NSNotification.Name.UIKeyboardWillHide.rawValue)
  // ...
}

func keyboardShow(_ notification: Notification){

    let userInfo = (notification as NSNotification).userInfo

    // Get animation curve of keyboard display
    let duration = userInfo![UIKeyboardAnimationDurationUserInfoKey] as! NSNumber
    let curve = userInfo![UIKeyboardAnimationCurveUserInfoKey] as! NSNumber
    let adjustedCurve = UIViewAnimationOptions(rawValue: (curve.uintValue << 16))

    UIView.animate(withDuration: duration.doubleValue, delay: 0, options: adjustedCurve, animations: {
        // animate tableview to offset
    }, completion: nil)
}

func keyboardHide(_ notification: Notification){

    let userInfo = (notification as NSNotification).userInfo
    let duration = userInfo![UIKeyboardAnimationDurationUserInfoKey] as! NSNumber
    let curve = userInfo![UIKeyboardAnimationCurveUserInfoKey] as! NSNumber
    let adjustedCurve = UIViewAnimationOptions(rawValue: (curve.uintValue << 16))

    UIView.animate(withDuration: duration.doubleValue, delay: 0, options: adjustedCurve, animations: {
       // animate tableview to normal position
    }, completion: nil)
}