class func lineSpacing(_ content: String,_ space: Int) -> NSAttributedString { let attributedString:NSMutableAttributedString = NSMutableAttributedString(string: content) let paragraphStyle = NSMutableParagraphStyle() paragraphStyle.lineSpacing = CGFloat(space) paragraphStyle.alignment = .right attributedString.addAttribute(NSParagraphStyleAttributeName,value: paragraphStyle,range: NSMakeRange(0,content.characters.count)) return attributedString }