Как настроить расширение загрузки широковещательной рассылки, как показывает программа просмотра на экране записи?

Question

Ниже транслируется настройка viewController

import ReplayKit

class BroadcastSetupViewController: UIViewController {

// Call this method when the user has finished interacting with the view controller and a broadcast stream can start
func userDidFinishSetup() {
    // URL of the resource where broadcast can be viewed that will be returned to the application
    let broadcastURL = URL(string:"http://apple.com/broadcast/streamID")

    // Dictionary with setup information that will be provided to broadcast extension when broadcast is started
    let setupInfo: [String : NSCoding & NSObjectProtocol] = ["broadcastName": "example" as NSCoding & NSObjectProtocol]

    // Tell ReplayKit that the extension is finished setting up and can begin broadcasting
    self.extensionContext?.completeRequest(withBroadcast: broadcastURL!, setupInfo: setupInfo)
}

func userDidCancelSetup() {
    let error = NSError(domain: "YouAppDomain", code: -1, userInfo: nil)
    // Tell ReplayKit that the extension was cancelled by the user
    self.extensionContext?.cancelRequest(withError: error)
}
}

Это то, что я имею в контроллере настройки трансляции.

Ниже приведен код для класса sampleHandler:

import ReplayKit

class SampleHandler: RPBroadcastSampleHandler {

override func broadcastStarted(withSetupInfo setupInfo: [String : NSObject]?) {
    // User has requested to start the broadcast. Setup info from the UI extension can be supplied but optional. 
}

override func broadcastPaused() {
    // User has requested to pause the broadcast. Samples will stop being delivered.
}

override func broadcastResumed() {
    // User has requested to resume the broadcast. Samples delivery will resume.
}

override func broadcastFinished() {
    // User has requested to finish the broadcast.
}

override func processSampleBuffer(_ sampleBuffer: CMSampleBuffer, with sampleBufferType: RPSampleBufferType) {
    switch sampleBufferType {
        case RPSampleBufferType.video:
            // Handle video sample buffer
            break
        case RPSampleBufferType.audioApp:
            // Handle audio sample buffer for app audio
            break
        case RPSampleBufferType.audioMic:
            // Handle audio sample buffer for mic audio
            break
    }
}
}

Это то, что в моем классе sampleHandler. Кто-нибудь может мне помочь, почему я не могу транслировать ScreenRecord? Любое предложение?