swift3.0 label行高extension封装

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
    }

（编辑：李大同）

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