去掉NSString中的HTML标签

经常出现字符串带有html标签。下面有个方法一步到位去掉HTML标签

<span style="font-family: 'comic sans ms', sans-serif; color: #008080; font-size: medium;">+(NSString *)flattenHTML:(NSString *)html trimWhiteSpace:(BOOL)trim
{
    NSScanner *theScanner = [NSScanner scannerWithString:html];
    NSString *text = nil;

    while ([theScanner isAtEnd] == NO) {
        // find start of tag
        [theScanner scanUpToString:@"<" intoString:NULL] ;
        // find end of tag
        [theScanner scanUpToString:@">" intoString:&text] ;
        // replace the found tag with a space
        //(you can filter multi-spaces out later if you wish)
        html = [html stringByReplacingOccurrencesOfString:
                [ NSString stringWithFormat:@"%@>", text]
                                               withString:@""];
    }

    return trim ? [html stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] : html;
}
</span>

 调用方法：

 

    notification33.alertBody =[self flattenHTML:body trimWhiteSpace:YES];