Swift设置textView的行间距

 let textview = UITextView(frame: CGRect(x: 100, y: 100, width: 100, height: 200))

 let paraph = NSMutableParagraphStyle()

 paraph.lineSpacing = 10;// 字体的行间距

 let attributes = [NSFontAttributeName:UIFont.systemFont(ofSize: 15),NSParagraphStyleAttributeName: paraph]

 textview.attributedText = NSAttributedString(string: "你的文字", attributes: attributes)

 

//如果是想在输入内容的时候就按照设置的行间距进行动态改变，那就需要将上面代码放到textView的delegate方法里

    func textViewDidChange(_ textView: UITextView) {

        let paraph = NSMutableParagraphStyle()

        paraph.lineSpacing = 10;// 字体的行间距

        let attributes = [NSFontAttributeName:UIFont.systemFont(ofSize: 15),NSParagraphStyleAttributeName: paraph]

        textView.attributedText = NSAttributedString(string: "你的文字", attributes: attributes)

    }