pingButton.swift

@IBAction func alertButtonTapped(sender: AnyObject) {
  var payload =
  ["debug":true,
      "aps":
          ["alert":"Ping From \(userName)",
          "badge":"1",
          "sound":"default"]
  ]
  let appDel = UIApplication.sharedApplication().delegate! as! AppDelegate

  var pushChannel = chan + "push"
  appDel.client?.publish(
      "test",
      toChannel: pushChannel,
      mobilePushPayload: payload as [NSObject : AnyObject],
      withCompletion: nil)
}