iOS 应用 Display Recorder 如何在不使用私有 API 的情况下录制屏幕

iOS 应用 Display Recorder 如何在不使用私有 API 的情况下录制屏幕？

swift
import ReplayKit
class ViewController: UIViewController, RPScreenRecorderDelegate, RPPreviewViewControllerDelegate {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        RPScreenRecorder.shared().delegate = self
    }
    
    @IBAction func startRecording(_ sender: UIButton) {
        RPScreenRecorder.shared().startRecording { (error) in
            if let error = error {
                print("录制屏幕时发生错误：\(error.localizedDescription)")
            } else {
                print("开始录制屏幕")
            }
        }
    }
    
    @IBAction func stopRecording(_ sender: UIButton) {
        RPScreenRecorder.shared().stopRecording { (previewViewController, error) in
            if let error = error {
                print("停止录制屏幕时发生错误：\(error.localizedDescription)")
            } else if let previewViewController = previewViewController {
                previewViewController.previewControllerDelegate = self
                self.present(previewViewController, animated: true, completion: nil)
            }
        }
    }
    
    func previewControllerDidFinish(_ previewController: RPPreviewViewController) {
        dismiss(animated: true, completion: nil)
    }
    
    func screenRecorder(_ screenRecorder: RPScreenRecorder, didStopRecordingWithError error: Error, previewViewController: RPPreviewViewController?) {
        if let previewViewController = previewViewController {
            previewViewController.previewControllerDelegate = self
            self.present(previewViewController, animated: true, completion: nil)
        } else {
            print("停止录制屏幕时发生错误：\(error.localizedDescription)")
        }
    }
}