title: How to use UIAlertController inside UITableViewCell
body: <p>How can I use an UIAlertController inside a <code>TableViewCell</code>?</p>
  
  <p>Gives me an error <code>does not have a member called "presentViewController"</code>.</p>
  
  <p>My <code>TableViewController</code> is named "OrdensCompraTableViewController"</p>
  
  <p><strong>My function:</strong></p>
  
  <pre><code>@IBAction func telefonarCliente(sender: AnyObject) {
  
      var alert = UIAlertController(title: "Fotos em falta!", message: "Tem de introduzir 6 fotos.", preferredStyle: UIAlertControllerStyle.Alert)
      alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil))
  
  
      self.presentViewController(alert, animated: true, completion: nil)
  
      if let phoneCallURL:NSURL = NSURL(string: "tel://") {
          let application:UIApplication = UIApplication.sharedApplication()
          if (application.canOpenURL(phoneCallURL)) {
              application.openURL(phoneCallURL);
          }
      }
  }
  </code></pre>