title: [NSMutableArray insertObject:atIndex:]: attempt to insert nil object at 0'
body: <p>i am creating custom cell.</p>
  
  <p>In that i added 3 textfields. so i want to store that textfield values into nsmutablearray.</p>
  
  <p>when i am trying this code  </p>
  
  <pre><code>UITextField *valueField = [[UITextField alloc] initWithFrame:CGRectMake(165,6, 135, 30)];
  valueField.borderStyle =  UITextBorderStyleRoundedRect;
  [cell addSubview:valueField];
  [array1 addObject:valueField.text];
  [valueField release];
  </code></pre>
  
  <p>i am getting error like this </p>
  
  <p><code>Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSMutableArray insertObject:atIndex:]: attempt to insert nil object at 0'</code></p>
  
  <p>so please tell me the reason 
  thanks in advance.</p>