title: How to open PDF file on TableView?
body: <p>In my app users can save web pages as PDF files on a TableView. Now how to open PDF file after clicking on a cell? The following codes is just I started with if let. You can advise your way to do it if it is different. Thanks.</p>
  
  <pre><code>override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
  
      if let pdfToOpen = NSUserDefaults.standardUserDefaults().objectForKey("pdfSaved") as? NSData {
  
  }
  </code></pre>