Question

我正在使用MWFeed（来自GitHub的Objective-C提要解析器），并且试图从提要中的文章访问图像。到目前为止，我已经写了这个：

let item =  feedItems[indexPath.row] as MWFeedItem?
        cell.itemImage?.layer.cornerRadius = 25.0
        cell.titleLabel.text = item?.title


        if item?.content != nil {
               let htmlContent = item!.content as NSString
               var imageSource = ""
               let rangeOfString = NSMakeRange(0, htmlContent.length)
               let regex = try! NSRegularExpression(pattern: "(<img.*?src=\")(.*?)(\".*?>)", options: [])
            if htmlContent.length > 0 {
                let match =  regex.firstMatch(in: htmlContent as String, options: [], range: rangeOfString)
            if match != nil {
               let imageURL = htmlContent.substring(with: match!.range(at: 2)) as NSString
                if NSString(string: imageURL.lowercased).range(of: "feedburner").location == NSNotFound {
               imageSource = imageURL as String
                }
              }
            }
            if imageSource != "" {
                cell.itemImage?.sd_setImage(with: URL(string: imageSource), placeholderImage: UIImage(named: "Placeholder1"))
            }
           }

编辑：item.content is nil我发现了什么地方错了，所以代码从未被调用，有人知道为什么item.content = nil以及如何解决这个问题吗？这是我正在使用的let url = NSURL(string: "https://sportingnews.com/rss")

供稿

如何从RSS feed获取图像URL？

0 个答案: