title: fatal error: unexpectedly found nil while unwrapping an Optional value
body: <p>I'm getting this error when I run my code: <code>fatal error: unexpectedly found nil while unwrapping an Optional value</code>, what could be causing this?</p>
  
  <pre><code>var bodyData = "tel_client=\(phoneNumber)&amp;id_pays=\(phoneCode)&amp;datetime_alibi=\(getDateTimeFormat(date))&amp;tel_contact=\(to)&amp;nb_rappel_alibi=1&amp;pr_rappel_alibi=5"
  //println(bodyData)
  request.HTTPBody = bodyData.dataUsingEncoding(NSUTF8StringEncoding)
  NSURLConnection.sendAsynchronousRequest(request, queue: NSOperationQueue.mainQueue()) {
      (response, data, error) in
      var error: NSError?
      var jsonData: NSDictionary = NSJSONSerialization.JSONObjectWithData(data, options:nil, error: &amp;error) as NSDictionary
  
      if jsonData["success"] as Int == 1 {
          let alertView = UIAlertView(title: "GOOD", message: nil, delegate: self, cancelButtonTitle: "ok")
          alertView.show()
      } else {
          let alertView = UIAlertView(title: "ERROR", message: jsonData["message"] as? String, delegate: self, cancelButtonTitle: "ok")
          alertView.show()
      }
  }
  </code></pre>