如何将html文本解析为无属性字符串的纯文本？

Question

How do I parse html text into plain text without attributed string?

This is my code:

(NSString *)convertHTML:(NSString *)html {
    NSScanner *myScanner;
    NSString *text = nil;
    myScanner = [NSScanner scannerWithString:html];
    while ([myScanner isAtEnd] == NO) {
        [myScanner scanUpToString:@"<" intoString:NULL];
        [myScanner scanUpToString:@">" intoString:&text];
        html = [html stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@>", text] withString:@""];
    }
    //
    html = [html stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
    return html;
}

Answer 1

假设您可以访问某种UIWEbView ，则可以执行一些JavaScript来检索包含要字符串化的HTML的元素的.text() 。

Answer 2

You can use the below code and get from here

-(NSString *)stringByStrippingHTML:(NSString*)str
{
    NSRange r;
    while ((r = [str rangeOfString:@"<[^>]+>" options:NSRegularExpressionSearch]).location     != NSNotFound)
    {
        str = [str stringByReplacingCharactersInRange:r withString:@""];
    }
    return str;
}

NSString *hstmString = @"This is <font color='red'>simple</font>";

NSString* strWithoutFormatting = [self stringByStrippingHTML:hstmString];

NSLog(@"%@", strWithoutFormatting);

It maybe help you :)

Answer 3

If using a library is an option you could try HTMLKit .

For example, given the following HTML:

<p>Some <b>text</b> to <em>extract</em></p>

one way to parse it to plain text would be:

// create a <div> element
HTMLElement *element = [[HTMLElement alloc] initWithTagName:@"div"];
// set its innerHTML
element.innerHTML = @"<p>Some <b>text</b> to <em>extract</em></p>";
// textContext of the element contains all the text
NSLog(@"%@", element.textContent);
// You get: 'Some text to extract'

Let me know if you need further help.

If your HTML is simple and parsing it is not the core functionality of your app/project, then maybe HTMLKit is not for you, since it is a full-fledged HTML parser.