iOS 去除字符串中的H5标签

//剔除 style 标签内的所有内容
-(NSString *)ridStylemark:(NSString *)html {
    NSScanner *theScanner;
    NSString *text = nil;
    theScanner = [NSScanner scannerWithString:html];
    while ([theScanner isAtEnd] == NO) {
        // find start of tag
        [theScanner scanUpToString:@"<style" intoString:NULL] ;
        // find end of tag
        [theScanner scanUpToString:@"/style>" intoString:&text] ;
        // replace the found tag with a space
        //(you can filter multi-spaces out later if you wish)
        html=[html stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@/style>", text] withString:@""];
    }
    return html;
}