Discover rolling clips with ReplayKit

// Start clip buffering API call

func startClipBuffering() {
    RPScreenRecorder.shared().startClipBuffering { error in
        if error != nil {
            print("Error attempting to start Clip Buffering")
            // Update the app recording state and UI.
            self.setClipState(active: false)
        } else {
            // No error encountered attempting to start a clip session.
            // Update the app recording state and UI.
            self.setClipState(active: true)
            
            // Set up camera View.
            self.setupCameraView()
        }
    }
}

// Stop clip buffering

func stopClipBuffering() {
    RPScreenRecorder.shared().stopClipBuffering { error in
        if error != nil {
            print("Error attempting to stop clip buffering")
        }
        // Update the app recording state and UI.
        self.setClipState(active: false)
        
        // Tear down camera view.
        self.tearDownCameraView()
    }
}

// Export clip button

@IBAction func exportClipButtonTapped(_ sender: Any) {
    // If clip buffering is active, export clip
    if self.isActive && self.getClipButton.isEnabled {
        exportClip()
    }
}

// Export clip

func exportClip() {
    let clipURL = getAppTempDirectory()
    let interval = TimeInterval(5)

    print("Generating clip at URL: \(clipURL)")
    RPScreenRecorder.shared().exportClip(to: clipURL, duration: interval) { error in
        if error != nil {
            print("Error attempting to export clip")
        } else {
            // No error, so save clip at URL to photos
            self.saveToPhotos(tempURL: clipURL)
        }
    }
}