title: tableview cell with no content
body: <p>My table view is populating but without a content on the cell
  when I try to put this line    <code>//cell.textLabel?.text = todoItems[indexPath.row]</code>. I am getting this error <a href="http://i.stack.imgur.com/97aH8.png" rel="nofollow">check the error</a></p>
  
  <pre><code>// Cell creation
  
  override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -&gt; UITableViewCell {
  
      let cell = tableView.dequeueReusableCellWithIdentifier("Cell", forIndexPath: indexPath) as! TableViewCell
  
      cell.selectionStyle = .None
      let item = todoItems[indexPath.row]
  
      cell.delegate = self
      cell.toDoItem = item
  
      // modify the cell to have check mark
      if (item.completed) {
  
          cell.accessoryType = UITableViewCellAccessoryType.Checkmark
      }
      else {
  
          cell.accessoryType = UITableViewCellAccessoryType.None
      }
  
      return cell
  }
  
  
  
  // Data source
  
  class DataSource: NSObject {
  
      let itenName: String
  
      var completed : Bool
      var deadline : NSDate
      var UUID :String
  
      init(itenName :String , completed :Bool = false , deadline : NSDate , UUID :String  ) {
          self.itenName = itenName
          self.completed = completed
          self.UUID = UUID
          self.deadline = deadline
          //self.subTitle = subTitle
      }
  }
  </code></pre>