Sample code for ReplayKit

ReplayKitSample.swift

import ReplayKit

func startRecording() {
    let recorder = RPScreenRecorder.shared()
    recorder.isMicrophoneEnabled = true
    recorder.startRecording(handler: {  error in
        if let error = error {
            NSLog("Failed start recording: \(error.localizedDescription)")
            return
        }
        
        NSLog("Start recording")
    })
}

func finishRecordingAndShowPreview() {
    guard RPScreenRecorder.shared().isRecording else {
        return
    }
    RPScreenRecorder
        .shared()
        .stopRecording(handler: { [weak self] (previewViewController, error) in
            guard let self = self, let previewViewController = previewViewController else {
                return
            }
            
            if let error = error {
                NSLog("Failed stop recording: \(error.localizedDescription)")
                return
            }
            DispatchQueue.main.async {
                previewViewController.previewControllerDelegate = self
                previewViewController.modalPresentationStyle = .overCurrentContext
                self.present(previewViewController, animated: true, completion: nil)
            }
        })
}


extension ViewController: RPPreviewViewControllerDelegate {
    func previewControllerDidFinish(_ previewController: RPPreviewViewController) {
        DispatchQueue.main.async {
            previewController.dismiss(animated: true, completion: nil)
        }
    }
}