swiftUILabel加载html源码

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  @IBOutlet weak var content: UILabel!

    func setup(content:String){
        self.content.preferredMaxLayoutWidth = UIScreen.mainScreen().bounds.size.width - 36
        let content = "<html><head><meta name= \"viewport\" content= \"width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0\"></head><body>" + content + "</body></html>"
        let data:NSData? = content.dataUsingEncoding(NSUnicodeStringEncoding, allowLossyConversion: true)
        
        do {
            
            let attrStr = try NSMutableAttributedString(data: data!, options: [NSDocumentTypeDocumentAttribute : NSHTMLTextDocumentType], documentAttributes: nil)
            
            attrStr.enumerateAttribute(NSAttachmentAttributeName, inRange: NSMakeRange(0, attrStr.length), options: NSAttributedStringEnumerationOptions.Reverse, usingBlock: { (vale, range, stop) -> Void in
                if let ment = vale as? NSTextAttachment{
                    ment.bounds.size = CGSizeMake(UIScreen.mainScreen().bounds.size.width - 20, 130)
                }
            })
            
            attrStr.addAttribute(NSFontAttributeName, value: UIFont.systemFontOfSize(14), range: NSMakeRange(0, attrStr.length))
            // 设置行距
            let style = NSMutableParagraphStyle()
            style.lineSpacing = 5
            attrStr.addAttribute(NSParagraphStyleAttributeName, value: style, range: NSMakeRange(0, attrStr.length))
            self.content.attributedText = attrStr
        } catch{
            
        }
        self.content.font = UIFont.systemFontOfSize(14)
        self.content.textColor = UIColor.darkGrayColor()
    }