extension ViewController : UITextViewDelegate {

    func textViewDidChange(_ textView: UITextView) {

        let expendSize = CGSize(width: textView.frame.width, height : .infinity)
        let estimatedSize = textView.sizeThatFits(expendSize)

        let heightOffset = estimatedSize.height - CGFloat(37.verticalValueAppliedScreenSize)

        self.ratingInputView.snp.updateConstraints { (make) in
            make.height.equalTo(heightOffset + CGFloat(95.verticalValueAppliedScreenSize))
        }

        UIView.animate(withDuration: 0.2) {
            self.view.layoutIfNeeded()
        }
    }

}