-(NSString *)filterHTML:(NSString *)html{
  NSScanner * scanner = [NSScanner scannerWithString:html];
  NSString * text = nil;
  while([scanner isAtEnd]==NO)
  {
    [scanner scanUpToString:@"<" intoString:nil];
    [scanner scanUpToString:@">" intoString:&text];
    html = [html stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@>",text] withString:@""];
  }
  return html;
}

-(NSString *)getZZwithString:(NSString *)string{
 NSRegularExpression *regularExpretion=[NSRegularExpression regularExpressionWithPattern:@"<[^>]*>|\n"
                                         options:0
                                          error:nil];
 string=[regularExpretion stringByReplacingMatchesInString:string options:NSMatchingReportProgress range:NSMakeRange(0, string.length) withTemplate:@""];
 return string;
}

+ (NSMutableAttributedString *)praseHtmlStr:(NSString *)htmlStr {
  NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithData:[htmlStr dataUsingEncoding:NSUnicodeStringEncoding] options:@{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType,NSCharacterEncodingDocumentAttribute :@(NSUTF8StringEncoding)} documentAttributes:nil error:nil];
  [attributedString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:13] range:NSMakeRange(0, attributedString.length)];
  [attributedString addAttribute:NSForegroundColorAttributeName value:CommonColor(Color333333) range:NSMakeRange(0, attributedString.length)];
 
  return attributedString;
}

func removeHTML(htmlString : String)->String{
    return htmlString.replacingOccurrences(of: "<[^>]+>", with: "", options: .regularExpression, range: nil)
}
 
extension String {
  func deleteHTMLTag(tag:String) -> String {
    return self.replacingOccurrences(of: "(?i)</?\(tag)\\b[^<]*>", with: "", options: .regularExpression, range: nil)
  }
  
  func deleteHTMLTags(tags:[String]) -> String {
    var mutableString = self
    for tag in tags {
      mutableString = mutableString.deleteHTMLTag(tag: tag)
    }
    return mutableString
  }
  
  ///去掉字符串标签
  mutating func filterHTML() -> String?{
    let scanner = Scanner(string: self)
    var text: NSString?
    while !scanner.isAtEnd {
      scanner.scanUpTo("<", into: nil)
      scanner.scanUpTo(">", into: &text)
      self = self.replacingOccurrences(of: "\(text == nil ? "" : text!)>", with: "")
    }
    return self
  }
}