去掉html代码字符中的标签符号

-(NSString *)stringWithHTMLString:(NSString *)html{    NSScanner * scanner = [NSScanner scannerWithString:html];    NSString * text = nil;    while([scanner isAtEnd]==NO)    {        //找到标签的起始位置        [scanner scanUpToString:@"<" intoString:nil];        //找到标签的结束位置        [scanner scanUpToString:@">" intoString:&text];        //替换字符        html = [html stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@"%@>",text] withString:@""];    }    //    NSString * regEx = @"<([^>]*)>";    //    html = [html stringByReplacingOccurrencesOfString:regEx withString:@""];    return html;}