title: NSArray value from PFObject
body: <p>How can load NSArray value from saved PFOBject?</p>
  
  <p>Save:</p>
  
  <pre><code>NSMutableArray *arr = [[NSMutableArray alloc]init];
  
     for (MyParseInformation *obj in results) {
         [arr addObject:obj.correct]; // correct is NSNumber
      }
      [pfobject addObject:arr forKey:@"results"];
  }
  
  [pfobject saveEventually:^(BOOL succeeded, NSError *error) {
  </code></pre>
  
  <p>Query:</p>
  
  <pre><code>PFQuery *query = [PFQuery queryWithClassName:className];
  [query findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
      if(!error){
           for (PFObject *obj in objects) {
  
              id str = [obj valueForKey:@"results"] ;
  </code></pre>
  
  <p>......
  id is <code>__NSArrayM</code> type class with count=1 and its content is:</p>
  
  <pre><code>(
          (
          1,
          1,
          1,
          1,
          1,
          1,
          0,
          0,
          0,
          1,
          1,
          1,
          0,
          1
      )
  ) 
  </code></pre>