text 에 따라서 UITextView 의 height를 변경

updateTextViewHeight.swift

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()
        }
    }
    
}