title: NSUnknownKeyException setValue:forUndefinedKey:
body: <blockquote>
    <p>Terminating app due to uncaught exception 'NSUnknownKeyException',
    reason: '[ setValue:forUndefinedKey:]:
    this class is not key value coding-compliant for the key
    buttonOfFirstView.'</p>
  </blockquote>
  
  <p>Why do I get this error? I am trying to make a table cell though XIB. After I add this code it throws the above exception.</p>
  
  <pre><code>- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
  
      static NSString *CellIdentifier = @"MyCell";
  
      MyTableViewCell *cell = (MyTableViewCell*) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
  
      if (cell == nil) {
  
          NSArray *arrayCellXib = [[NSBundle mainBundle] loadNibNamed:@"MyTableViewCell" 
                                                                owner:self 
                                                              options:nil];
  
  ....
  } 
  .....
  
  return cell;
  }
  </code></pre>
  
  <p>How to resolve it?</p>