iOS 字符串删除 DOM

iOS  string 删除 包含的 DOM

   NSMutableString *mutableString = [NSMutableString stringWithString:responseString];

            NSString *string = @"\xEF\xBB\xBF";
            while ([mutableString rangeOfString:string].location != NSNotFound) {
                NSRange range = [mutableString rangeOfString:string];
                [mutableString deleteCharactersInRange:range];
            }

　　http://www.cnblogs.com/Ionatan/p/4551875.html