如何将NSAttributedString转换为HTML字符串？ [英] How do i convert NSAttributedString into HTML string?

问题描述

如标题所示，现在我可以简单地将HTML转换为 NSAttributedString 与 initWithHTML：documentAttributes：我想在这里做反向。
是否有任何第三方库来实现这一点？

As the title tells,now i can simple convert HTML into NSAttributedString with initWithHTML:documentAttributes: , but what i want to do here is reverse. Is there any 3rd party library to achieve this?

   @implementation NSAttributedString(HTML)
-(NSString *)htmlForAttributedString{
    NSArray * exclude = [NSArray arrayWithObjects:@"doctype",
                         @"html",
                         @"head",
                         @"body",
                         @"xml",
                         nil
                         ];
    NSDictionary * htmlAtt = [NSDictionary
                              dictionaryWithObjectsAndKeys:NSHTMLTextDocumentType,
                              NSDocumentTypeDocumentAttribute,
                              exclude,
                              NSExcludedElementsDocumentAttribute,
                              nil
                              ];
    NSError * error;
    NSData * htmlData = [self dataFromRange:NSMakeRange(0, [self length])
                               documentAttributes:htmlAtt error:&error
                         ];
        //NSAttributedString * htmlString = [[NSAttributedString alloc]initWithHTML:htmlData documentAttributes:&htmlAtt];
    NSString * htmlString = [[NSString alloc] initWithData:htmlData encoding:NSUTF8StringEncoding];
    return htmlString;
}
@end

推荐答案

使用设置为HTML（ NSHTMLTextDocumentType）的文档类型属性（ NSDocumentTypeDocumentAttribute ）使用 dataFromRange：documentAttributes： ）：

Use dataFromRange:documentAttributes: with the document type attribute (NSDocumentTypeDocumentAttribute) set to HTML (NSHTMLTextDocumentType):

NSAttributedString *s = ...;
NSDictionary *documentAttributes = @{NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType};    
NSData *htmlData = [s dataFromRange:NSMakeRange(0, s.length) documentAttributes:documentAttributes error:NULL];
NSString *htmlString = [[NSString alloc] initWithData:htmlData encoding:NSUTF8StringEncoding];

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