Go Live with ReplayKit

private lazy var sharedRecorder = RPScreenRecorder.shared()
func didPressRecordButton() {
    sharedRecorder.startRecording { error in              // 녹화 시작
       if error == nil {
           self.showIndicatorView(text: "Recording")
      }
   }
}

// 녹화중이라는 인디케이터를 보여줍시다.
func showIndicatorView(text: String) {
   recordingIndicatorWindow = UIWindoe(frame: UIScreen.main().bounds) // 별도 윈도우에 만들어서 영상에 포함되지 않음 ㅇㅁㅇ?
   recordingIndicatorWindow?.isHidden = false
   recordingIndicatorWindow?.backgroundColor = UIColor.clear()
   recordingIndicatorWindow?.isUserInteractionEnabled = false

   let indicatorView = IndicatorView(text: text)
   recordingIndicatorWindow?.addSubview(indicatorView)
}

// 중지 버튼을 눌렀습니다!
func didPressStopButton() {
    sharedRecorder.stopRecording { previewViewController, error in  // 녹화가 종료되면 previewViewController 객체가 함께 넘어옴
        self.hideIndicatorView()

       if error == nil {    // error 없이 종료되었다면 프리뷰 화면을 보여줄 것.
          self.previewController = previewViewController
          self.previewViewController?.previewControllerDelegate = self
      }
}

// 메뉴가 뜬 상태에서, 공유를 눌렀을 경우
func didPressShareButton() {
   if let preview = previewViewController {
       preview.mode = .share /// 미리보기는 preview
       self.present(preview, animated: true)
   }
}

// 사용자가 프리뷰 화면에서 되돌아 오려고 할떄
// RPPreviewViewControllerDelegate 내부 함수입니다.
func previewControllerDidFinish(_ previewController: RPPreviewViewController) {
 previewController.dismiss(animated: true) // 옹 이쪽에서 닫아줍니다
}

func didPressBroadcastButton() {
   RPBroadcastActivityViewController.load { broadcastAVC, error in  // broadcast service 를 제공하는 앱을 선택할 수 있는 화면 표출해주기 (share extension이랑 비슷한 흐름)
      if let broadcastAVC = broadcastAVC {
      broadcastAVC.delegate = self
      self.present(broadcastAVC, animated: true)
      }
   }
}

// 서비스를 선택하고 / 혹은 선택하지 않고 닫았을 때
// RPBroadcastActivityViewControllerDelegate
func broadcastActivityViewController(
    _ broadcastAVC: RPBroadcastActivityViewController,
    didFinishWith broadcastController: RPBroadcastController?,
    error: NSError?) {

   broadcastAVC.dismiss(animated: true) {
      self.startCountDownTimer {     // 아니 broadcastController 이게 있는지 먼저 체크해야하는 거 아닌가
           broadcastController?.startBroadcast { error in
            // broadcast started!
        }
 }

func didPressBroadcastButton() {
      self.broadcastController?.finishBroadcast { error in
          if error == nil {
             // broadcast finished!
             self.updateBroadcastUI()
         }
     }
}

// RPBroadcastActivityViewControllerDelegate
func broadcastActivityViewController(
   _ broadcastActivityViewController: RPBroadcastActivityViewController,
   didFinishWith broadcastController: RPBroadcastController?,
   error: NSError?) {

     self.broadcastController = broadcastController

     // set a delegate to be notified of errors
     self.broadcastController?.delegate = self
 }

//RPBroadcastControllerDelegate
func broadcastController(
   _ broadcastController: RPBroadcastController,
   didFinishWithError error: NSError?) {
     if error != nil {
       // error occurred during broadcast
       self.showErrorMessage(message: error!.localizedDescription)

      // update UI to indicate the broadcast is stopped
     self.updateBroadcastUI()
   }
}

func applicationWillResignActive() {
    // ReplayKit will automatically pause the broadcast
 }

 func applicationDidBecomeActive() {
    if self.broadcastController?.isBroadcasting == true {
       self.promptUserToResumeBroadcast { userWantsToResume in
           if (userWantsToResume == true) {
                  // user wants to resume
                  self.broadcastController?.resumeBroadcast()
                  self.updateBroadcastUI()
         } else {
                 // user does not want to resume
                 self.broadcastController?.finishBroadcast { error in
                 self.updateBroadcastUI()
        }