Question

我在滚动视图中使用文本视图加载html内容，如下面的代码。在设备上进行测试时，一切正常。但是当我在模拟器上进行测试时，内容会消失，但您仍然可以复制/粘贴它们。 See the no content image.当 html字符串太长时会发生这种情况。

当我删除css ＆＃34; font-family：（font！.fontName）时，它会起作用; font-size：（font！.pointSize）＆＃34; 或禁用文本视图的＆＃34;滚动启用＆＃34; 。

欢迎任何建议，谢谢！

let screenWidth = htmlContentTv.frame.width - 10
let font = UIFont(name: "Univers-Light", size: 16)
let html = "<html><head><style>img{max-width:\(screenWidth)px;height:auto !important;width:auto !important;};</style> </head>" + "<body><div style=\"font-family: \(font!.fontName); font-size: \(font!.pointSize);color: #000000; line-height:1.5;\">%@</div></body></html>"
let processHtml = String(format: html, article.content!)

do {
    let attrStr = try NSAttributedString(
        data: processHtml.data(using:.unicode, allowLossyConversion: true)!,
        options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
                   NSFontAttributeName: font!],
        documentAttributes: nil)
    htmlContentTv.attributedText = attrStr
} catch let error {
    print("html error \(error)" )
}

Answer 1

这不是显示html文本的好方法，如果你没有明确的理由使用UITextView，你可以在这种情况下使用UIWebView：

webView.loadHTMLString(htmlText, baseURL: nil)

如果您需要更改颜色或字体，可以使用此扩展程序

extension String
{
    func htmlFormattedString(font:UIFont, color: UIColor) -> String
    {
        let numberOfColorComponents:Int = color.cgColor.numberOfComponents
        let colorComponents = color.cgColor.components

        var colorHexString = ""
        if numberOfColorComponents == 4 {
            let red = (colorComponents?[0])! * 255
            let green = (colorComponents?[1])! * 255
            let blue = (colorComponents?[2])! * 255

            colorHexString = NSString(format:"%02X%02X%02X", Int(red), Int(green), Int(blue)) as String
        } else if numberOfColorComponents == 2 {
            let white = (colorComponents?[0])! * 255

            colorHexString = NSString(format:"%02X%02X%02X", Int(white), Int(white), Int(white)) as String
        } else {
            return "Color format noch supported"
        }

        return NSString(format: "<html>\n <head>\n <style type=\"text/css\">\n body {font-family: \"%@\"; font-size: %@; color:#%@;}\n </style>\n </head>\n <body>%@</body>\n </html>", font.familyName, String(stringInterpolationSegment: font.pointSize), colorHexString, self) as String
    }
}

要使用它，只需在将文本加载到WebView

之前调用htmlText.htmlFormattedString(font:someFont,color:.red)即可

ios textview attributionText加载html字体在设备中工作但不是模拟器

1 个答案: