iOS swift UITextView行间距

iOS swift UITextView行间距

func textViewDidChange(_ textView: UITextView) {
        let mutableAttrStr = NSMutableAttributedString(string: textView.text)
        let style = NSMutableParagraphStyle()
        style.lineSpacing = 27
        mutableAttrStr.addAttributes([NSParagraphStyleAttributeName:style], range: NSMakeRange(0, mutableAttrStr.length))
        textView.attributedText = mutableAttrStr
    }