Swift:如何从html源代码显示图像

时间:2016-11-19 11:59:50

标签: html swift image

如何在swift 2.2中的某些网站上显示html源图像?

实际上我没有任何JSON或XML。

重要的是我必须使用正则表达式。

我试过了:

if htmlContent != nil
{
    let htmlContent = (item?.htmlContent)! as NSString
    var imageSource = ""
    let rangeOfString = NSMakeRange(0, htmlContent.length)
    let regex = try! NSRegularExpression(pattern: "(<img.*?src=\")(.*?)(\".*?>)", options: [.CaseInsensitive])
    if htmlContent.length > 0
    {
        let match = regex.firstMatchInString(htmlContent as String, options: [.WithTransparentBounds], range: rangeOfString)
        if match != nil
        {
            let imageURL = htmlContent.substringWithRange(match!.rangeAtIndex(2)) as NSString
            print(imageURL)
            if NSString(string: imageURL.lowercaseString).rangeOfString("feedBurner").location == NSNotFound
            {
                imageSource = imageURL as String
            }
        }
    }

    if imageSource != ""
    {
        imgHTMLLoader.setImageWithURL(NSURL(fileURLWithPath: imageSource), placeholderImage: UIImage(named: "placeholder"))
        print("placeholderImage is not! nil")
    }
    else
    {
        imgHTMLLoader.image = UIImage(named: "placeholder")
        print("placeholderImage is nil")
    }

}

在此示例(库)中... htmlContent始终为nil。

此示例使用“帮助程序库”,但它不起作用......

感谢

1 个答案:

答案 0 :(得分:2)

使用SwiftSoup第三方库和Swift 3.0

let doc = try SwiftSoup.parse("<div id=div1><p>Hello</p><p>Another <b>element</b></p><div id=div2><img src=foo.png></div></div>");
for element in try doc.select("img").array(){
    try print(element.attr("src"))
}
//foo.png