unwindForNewCall

unwindForNewCall.swift

@IBAction private func unwindForNewCall(_ segue: UIStoryboardSegue) {
  // 1.
  let newCallController = segue.source as! NewCallViewController
  guard let handle = newCallController.handle else { return }
  let videoEnabled = newCallController.videoEnabled

  // 2.
  let backgroundTaskIdentifier = UIApplication.shared.beginBackgroundTask(expirationHandler: nil)
  DispatchQueue.main.asyncAfter(wallDeadline: DispatchWallTime.now() + 1.5) {
    AppDelegate.shared.displayIncomingCall(uuid: UUID(), handle: handle, hasVideo: videoEnabled) { _ in
      UIApplication.shared.endBackgroundTask(backgroundTaskIdentifier)
    }
  }
}