将 NSAttributedString 转换为 HTML 字符串

Question

我只想要 HTML 字符串中的正文部分。

下面的代码是完整的 HTLM 字符串：

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="Content-Style-Type" content="text/css">
<title></title>
<meta name="Generator" content="Cocoa HTML Writer">
<style type="text/css">
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; line-height: 45.0px; font: 37.9px 'Times New Roman'; color: #000000; -webkit-text-stroke: #000000}
span.s1 {font-family: 'Times New Roman'; font-weight: normal; font-style: normal; font-size: 37.92pt; font-kerning: none}
span.s2 {font-family: 'TimesNewRomanPS-BoldMT'; font-weight: bold; font-style: normal; font-size: 37.92pt; font-kerning: none}
</style>
</head>
<body>
<p class="p1"><span class="s1">-1 Water damage and dry-rot observed on fascia boards around </span><span class="s2">the perimeter of the structur</span><span class="s1">e.</span></p>
</body>
</html>

我只想要下面的部分没有 CSS。

<body>
<p class="p1"><span class="s1">-1 Water damage and dry-rot observed on fascia boards around </span><span class="s2">the perimeter of the structur</span><span class="s1">e.</span></p>
</body>

Answer 1

 NSString * string;
 NSString * pattern;

 string = html// [NSString stringWithContentsOfURL:[[NSBundle mainBundle]  URLForResource:@"File" withExtension:nil] encoding:NSASCIIStringEncoding error:nil];
 pattern = @"<body>[ \w\d\n<>=\\"-/]*</body>";

 NSRegularExpression *   regex =  [[NSRegularExpression alloc]initWithPattern:pattern options:(NSRegularExpressionAnchorsMatchLines) error:nil] ;
 NSTextCheckingResult * result = [regex firstMatchInString:string options:0 range:NSMakeRange(0, string.length)];
  if (result != nil){
     NSString * resultString  = [string substringWithRange: result.range];
     NSLog(resultString);
 }

Answer 2

在 mac，如果您仍然想要样式，但希望将它们嵌入到您的标签中，您可以要求 NSAttributedString 排除样式标签，如下所示：

NSDictionary *documentAttributes = @{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,
                                     NSExcludedElementsDocumentAttribute: @[@"style"]
                                     };
NSData *htmlData = [attributedString dataFromRange:NSMakeRange(0, attributedString.length) documentAttributes:documentAttributes error:NULL];

这样，您的标签中就会嵌入所有样式。

遗憾的是，它在 iOS 上不可用。

Answer 3

我使用 webView 而不是 textView 来显示属性字符串。

NSString *strState = [webView stringByEvaluatingJavaScriptFromString:@"document.body.innerHTML"];

此方法将 return 给你 HTML 没有 CSS 的字符串。

将 NSAttributedString 转换为 HTML 字符串

Convert NSAttributedString to HTML String

objective-c

nsattributedstring

ios