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我将网站的源代码存储到字符串中，并成功删除了所有 html 标签。但是，段落之间存在随机空格。有时只有一行，有时是 4 或 5 行。

这是我所做的

- (NSString *)parseHTMLText:(NSString *)text {

    NSString *startingPt = @"<!-- (START) Pagination Content Wrapper -->";
    NSString *endingPt = @"<!-- (END) Pagination Content Wrapper -->";

    //isolate body text from entire source code
    NSString *leftTrimmed = [text substringFromIndex:NSMaxRange([text rangeOfString:startingPt])] ;
    NSString *completeTrimmed = [leftTrimmed substringToIndex:[leftTrimmed rangeOfString:endingPt].location];
    completeTrimmed = [completeTrimmed stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

    completeTrimmed =  [self removeHTMlTagsFromString:completeTrimmed];
    completeTrimmed = [completeTrimmed stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

    return completeTrimmed; 

}

- (NSString *)removeHTMlTagsFromString:(NSString *)text {

    //check if there are any html tags

    if ([text rangeOfString:@"<"].location != NSNotFound && [text rangeOfString:@">"].location != NSNotFound) {
        //find first index of "<"
        int startIndex = [text rangeOfString:@"<"].location;
        NSString *startOfTag =  [text substringFromIndex:startIndex];
        // find length to ">"
        int length = [startOfTag rangeOfString:@">"].location + 1;
        text = [text stringByReplacingCharactersInRange:NSMakeRange(startIndex, length) withString:@""];

        text = [self removeHTMlTagsFromString:text];
    }

    return text;

}

我试过这个，但它不起作用

completeTrimmed = [completeTrimmed stringByReplacingOccurrencesOfString:@"     " withString:@""];
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1 回答 1

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如果原始 HTML 看起来像：

<tag1>
<tag2>
<tag3>
text text text
</tag3>
</tag2>
</tag1>

然后，当您删除所有标签时，您仍然会有分隔它们的换行符。

使用 DOM 解析库而不是原始字符串函数，您的问题应该得到解决。

于 2012-10-25T06:30:10.133 回答