title: How can get value NULL in parse XML iOS
body: <p>I want to get all value that response from server. I used NSParseXML to parse xml but when element is null, it missed that value and not add to Array.
  Example: my xml </p>
  
  <pre><code> &lt;FILE&gt;
       &lt;STATE&gt;2&lt;/STATE&gt;
       &lt;MEMO/&gt;
  &lt;/FILE&gt;
  </code></pre>
  
  <p>In my xml,  is <strong><code>Null</code></strong>.</p>
  
  <p>This is my code:</p>
  
  <pre><code> - (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qualifiedName attributes:(NSDictionary *)attributeDict
      {
          NSLog(@"Did start element");
  if ( [elementName isEqualToString:@"FILENAME"])
      {
          XML_FIELD = FILENAME_CLOUD;
          NSLog(@"found rootElement");
  
          return;
      }
         else if ( [elementName isEqualToString:@"MEMO"])
          {
              NSLog(@"found rootElement");
              XML_FIELD = MEMO;
              return;
          }
  
      }
  
      - (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName
      {
  
  
              NSLog(@"Did end element");
              if ([elementName isEqualToString:@"FILENAME"])
              {
                  NSLog(@"rootelement end");
              }
              XML_FIELD = UNIMPORTANT;
  
      }
          - (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string
      {
         if (XML_FIELD == FILENAME_CLOUD)
      {
          NSLog(@"Value %@",string);
          [FileCompletedArray insertObject:string atIndex:0];
  
      }
         else if (XML_FIELD == MEMO)
          {
              NSLog(@"Value %@",string);
              [memoarray insertObject:string atIndex:0];
          }
  
      }
  </code></pre>
  
  <p>When load data into TableView, it not load value null in label. I'm debug, memoarray not add <code>NULL</code> value.
  How can I get all null value? Thanks in advance</p>