NSScanner

mark:

NSScanner是一个类，用于在字符串中扫描指定的字符，尤其是把它们翻译/转换为数字和别的字符串。

http://blog.csdn.net/likendsl/article/details/7974761

- (NSString *)filterHTML:(NSString *)html
{
    NSScanner * scanner = [NSScanner scannerWithString:html];
    NSString * text = nil;
    while([scanner isAtEnd]==NO)
    {
        [scanner scanUpToString:@"<" intoString:nil];
        [scanner scanUpToString:@">" intoString:&text];
        html = [html stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@>",text] withString:@""];
    }
    return html;
}

scanner 感觉是对遍历字符的封装，但是又不完全，要借助while