---
title: "Collaborating on PDFs in board meetings using Swift for iOS"
canonical_url: "https://www.nutrient.io/guides/ios/samples/board-meeting/"
md_url: "https://www.nutrient.io/guides/ios/samples/board-meeting.md"
last_updated: "2026-05-25T12:14:42.940Z"
description: "Learn to create or join collaborative board meeting sessions using Nutrient Instant. Explore our resources for enhancing PDF collaboration today!"
---

# Collaborating on PDFs in board meetings using Swift for iOS

Shows how to create or join a collaborative editing session for a board meeting based on Nutrient Instant. This example connects to the public Nutrient Web SDK examples server using Nutrient Instant. Get additional resources by visiting our blog on [collaborating on PDF during board meetings](/blog/industry-solution-board-meeting-ios/).

[Get Started](https://www.nutrient.io/sdk/ios/getting-started.md)

[All Samples](https://www.nutrient.io/guides/ios/samples.md)

[Download](https://www.nutrient.io/guides/ios/downloads.md)

[Launch Demo](https://www.nutrient.io/demo/)

---

```swift

//
//  Copyright © 2021-2026 PSPDFKit GmbH. All rights reserved.
//
//  The Nutrient sample applications are licensed with a modified BSD license.
//  Please see License for details. This notice may not be removed from this file.
//

import Instant
import PSPDFKit
import PSPDFKitUI

/// This example connects to our public Nutrient Web SDK examples server and downloads documents using Nutrient Instant.
/// You can then collaboratively annotate these documents using Instant.
/// Each document on the examples server can be accessed via its URL.
///
/// The example lets you either create a new collaboration group then share the URL,
/// or join an existing collaboration group by entering a URL.
/// To speed this up, the URL can be read from a QR code.
///
/// Other supported clients include:
///
/// - Nutrient Web SDK examples: https://web-examples.our.services.nutrient-powered.io
/// - PDF Viewer for iOS and Android: https://pdfviewer.io
/// - Nutrient Catalog example app for Android
///
/// As is usually the case with Instant, most of the code here deals with communicating with the
/// particular server backend (our Web examples server in this case), so is not particularly useful
/// as example code. The same applies to the other files in this folder.
///
/// The code actually interacting with the Instant framework API is in `InstantDocumentViewController.swift`.

/// This example uses the following Nutrient features:
/// - Viewer
/// - Annotations
/// - Instant
///
/// See https://www.nutrient.io/sdk/ios for the complete list of Nutrient iOS SDK’s features.

class BoardMeetingExample: IndustryExample {
    override init() {
        super.init()

        title = "Board Meeting"
        contentDescription = "Shows how to create or join a collaborative editing session for a board meeting."
        category =.industryExamples
        priority = 2
        extendedDescription = "This example shows how multiple attendees can annotate and collaborate on the same document in real time, which can be useful for reviewing a report during a virtual meeting."
        url = URL(string: "https://www.nutrient.io/blog/industry-solution-board-meeting-ios/")!
        image = UIImage(systemName: "person.2")
    }

    override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController {
        return BoardMeetingExampleViewController(with: self)
    }
}

/// Shows UI to either start a new collaboration session or join an existing session.
private class BoardMeetingExampleViewController: UITableViewController {

    private var moreInfo: MoreInfoCoordinator?

    private lazy var apiClient = WebExamplesAPIClient(delegate: self)

    /// A reference to the text field in the cell so it can be disabled when starting a new group to avoid duplicate network requests.
    weak var codeTextField: UITextField?

    init(with example: IndustryExample) {
        super.init(style:.grouped)
        title = "Board Meeting"

        // Add the more info button.
        moreInfo = MoreInfoCoordinator(with: example, presentationContext: self)
        navigationItem.leftBarButtonItem = moreInfo?.barButton
        navigationItem.leftItemsSupplementBackButton = true
    }

    @available(*, unavailable)
    required init?(coder decoder: NSCoder) {
        fatalError("init(coder:) is not supported.")
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        tableView.cellLayoutMarginsFollowReadableWidth = true
        tableView.register(UITableViewCell.self, forCellReuseIdentifier: CellIdentifier.newGroup.rawValue)
        tableView.register(InstantExampleDocumentLinkCell.self, forCellReuseIdentifier: CellIdentifier.urlField.rawValue)
        #if!os(visionOS)

        tableView.register(UITableViewCell.self, forCellReuseIdentifier: CellIdentifier.scanCode.rawValue)
        tableView.keyboardDismissMode =.onDrag
        #endif

    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        moreInfo?.showAlertIfNeeded()
    }

    private enum CellIdentifier: String {
        case newGroup
        case urlField
        #if!os(visionOS)

        case scanCode
        #endif

    }

    private struct Row {
        let identifier: CellIdentifier
        let allowsHighlight: Bool
    }

    private struct Section {
        let header: String?
        let rows: [Row]
        let footer: String?
    }

    /// Data to show in the table view.
    private lazy var sections: [Section] = {
        let newMeetingSection = Section(header: "Start a new meeting", rows: [Row(identifier:.newGroup, allowsHighlight: true)], footer: "Get a new document link, then collaborate by entering it in Nutrient Catalog on another device, or opening the document link in a web browser.")

        var joinSessionRows = [Row]()
        #if!targetEnvironment(simulator) &&!os(visionOS)

        joinSessionRows.append(Row(identifier:.scanCode, allowsHighlight: true))
        #endif

        joinSessionRows.append(Row(identifier:.urlField, allowsHighlight: false))
        let joinSessionSection = Section(header: "Join a meeting", rows: joinSessionRows, footer: "Scan or enter a document link from PDF Viewer or Nutrient Catalog on another device, or from a web browser showing web-examples.our.services.nutrient-powered.io.")

        return [newMeetingSection, joinSessionSection]
    }()

    override func numberOfSections(in tableView: UITableView) -> Int {
        return sections.count
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return sections[section].rows.count
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let row = sections[indexPath.section].rows[indexPath.row]
        let cell = tableView.dequeueReusableCell(withIdentifier: row.identifier.rawValue, for: indexPath)

        cell.textLabel?.textColor = tableView.tintColor
        cell.textLabel?.font = UIFont.preferredFont(forTextStyle:.headline)

        switch row.identifier {
        case.newGroup:
            cell.textLabel?.text = "Start a meeting"
            return cell

        #if!os(visionOS)

        case.scanCode:
            cell.textLabel?.text = "Scan QR Code"
            return cell
        #endif

        case.urlField:
            let textField = (cell as! InstantExampleDocumentLinkCell).textField

            codeTextField = textField

            textField.delegate = self
            return cell
        }
    }

    override func tableView(_ tableView: UITableView, titleForHeaderInSection section: Int) -> String? {
        return sections[section].header
    }

    override func tableView(_ tableView: UITableView, titleForFooterInSection section: Int) -> String? {
        return sections[section].footer
    }

    override func tableView(_ tableView: UITableView, shouldHighlightRowAt indexPath: IndexPath) -> Bool {
        return sections[indexPath.section].rows[indexPath.row].allowsHighlight
    }

    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
        let rowId = sections[indexPath.section].rows[indexPath.row].identifier

        switch rowId {
        case.newGroup:
            createNewSession(documentIdentifier: InstantExampleDocumentIdentifier.boardMeeting)
        #if!os(visionOS)

        case.scanCode:
            requestPermissionAndPresentScanner()
        #endif

        case.urlField:
            fatalError("Shouldn’t be able to select URL field cell.")
        }
    }

    /// Creates a new Instant Collaboration session for the given document identifier and sends the new session info to the delegate if successful.
    private func createNewSession(documentIdentifier: InstantExampleDocumentIdentifier) {
        showProgressHUD(with: "Creating") { progressHUDItem in
            self.apiClient.createNewSession(documentIdentifier: documentIdentifier) { result in
                DispatchQueue.main.async {
                    progressHUDItem.pop(animated: true, completion: nil)
                    self.didReceiveNewSession(result)
                }
            }
        }
    }

    /// Joins an existing Instant Collaboration session using the session URL and sends the new session info to the delegate if successful.
    private func joinExistingSession(_ sessionURL: URL) {
        showProgressHUD(with: "Joining") { progressHUDItem in
            self.apiClient.resolveExistingSessionURL(sessionURL) { result in
                DispatchQueue.main.async {
                    progressHUDItem.pop(animated: true, completion: nil)
                    self.didReceiveNewSession(result)
                }
            }
        }
    }

    /// Manages the result of a new session creation or joining of an existing session by informing
    /// the `delegate` if a new session was created successfully otherwise presents the error
    /// as an alert.
    private func didReceiveNewSession(_ result: Result<InstantDocumentInfo, WebExamplesAPIClientError>) {
        switch result {
        case let.success(documentInfo):
            presentInstantViewController(for: documentInfo)
        case.failure(WebExamplesAPIClientError.cancelled):
            break // Do not show the alert if user cancelled the request themselves.
        case let.failure(otherError):
            showAlert(withTitle: "Couldn’t Get Instant Document Info", message: otherError.localizedDescription)
        }
    }

    /// Shows a progress HUD with the given text and performs the `operation` closure on presenting
    /// the progress HUD.
    /// The `operation` closure is responsible for dismissing the presented progress HUD.
    private func showProgressHUD(with hudText: String, operation: @escaping (StatusHUDItem) -> Void) {
        let progressHUDItem = StatusHUDItem.indeterminateProgress(withText: hudText)
        progressHUDItem.setHUDStyle(.black)

        progressHUDItem.push(animated: true, on: view.window) {
            operation(progressHUDItem)
        }
    }

    private func presentInstantViewController(for documentInfo: InstantDocumentInfo) {
        let instantViewController = InstantDocumentViewController(documentInfo: documentInfo)
        let navigationController = UINavigationController(rootViewController: instantViewController)
        navigationController.modalPresentationStyle =.fullScreen
        present(navigationController, animated: true)
    }

#if!os(visionOS)

    private func requestPermissionAndPresentScanner() {
        AVCaptureDevice.requestAccess(for:.video) { [weak self] (granted: Bool) -> Void in
            DispatchQueue.main.async {
                guard let self else {
                    return
                }
                if granted {
                    let scannerVC = ScannerViewController()
                    scannerVC.delegate = self
                    let navigationVC = UINavigationController(rootViewController: scannerVC)
                    navigationVC.modalPresentationStyle =.fullScreen

                    self.navigationController?.present(navigationVC, animated: true, completion: nil)
                } else {
                    self.tableView.selectRow(at: nil, animated: true, scrollPosition:.none)
                    self.showAlert(withTitle: "Camera Access Needed", message: "To scan QR codes, enable camera access in the Settings app.")
                }
            }
        }
    }
#endif

}

// MARK: - Text field delegate

extension BoardMeetingExampleViewController: UITextFieldDelegate {

    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        guard let text = textField.text,!text.isEmpty else {
            textField.resignFirstResponder()
            return true
        }

        if let url = URL(string: text.trimmingCharacters(in:.whitespacesAndNewlines)) {
            joinExistingSession(url)
        } else {
            showAlert(withTitle: "Couldn’t Join Group", message: "This is not a link. Please enter an Instant document link.")
        }

        return true
    }
}

// MARK: - Scanner view controller delegate

#if!os(visionOS)

extension BoardMeetingExampleViewController: ScannerViewControllerDelegate {

    func scannerViewController(_ scannerViewController: ScannerViewController, didFinishScanningWith result: BarcodeScanResult) {
        if case.success(let barcode) = result {
            codeTextField?.text = barcode
        }

        self.dismiss(animated: true) {
            switch result {
            case.success(let barcode):
                if let url = URL(string: barcode) {
                    self.joinExistingSession(url)
                } else {
                    self.showAlert(withTitle: "Couldn’t Join Group", message: "This is not a link. Please enter an Instant document link.")
                }
            case.failure(let errorMessage):
                self.showAlert(withTitle: "Couldn’t Scan QR Code", message: errorMessage)
            }
        }
    }
}
#endif

extension BoardMeetingExampleViewController: WebExamplesAPIClientDelegate {

    func examplesAPIClient(_ apiClient: WebExamplesAPIClient, didReceiveBasicAuthenticationChallenge challenge: URLAuthenticationChallenge, completion: @escaping (URLCredential?) -> Void) {
        presentBasicAuthPrompt(for: challenge) { username, password in
            guard let user = username,
                  let pass = password else {
                completion(nil)
                return
            }

            let urlCredential = URLCredential(user: user, password: pass, persistence:.permanent)
            completion(urlCredential)
        }
    }
}

```

This code sample is an example that illustrates how to use our SDK. Please adapt it to your specific use case.

---

## Related pages

- [Implement a Document Picker sidebar in Swift for iOS](/guides/ios/samples/document-picker-sidebar.md)
- [Add file annotation to PDF in Swift for iOS](/guides/ios/samples/add-file-annotation-with-embedded-file.md)
- [Add a custom cloudy rectangle annotation to a PDF in Swift for iOS](/guides/ios/samples/add-custom-cloudy-rectangle.md)
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- [Asynchronously sign PDF in Swift for iOS](/guides/ios/samples/asynchronous-digital-signature-in-pdf.md)
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- [Add video, audio, image annotation to PDF in Swift for iOS](/guides/ios/samples/gallery.md)
- [Convert HTML to PDF using Swift for iOS](/guides/ios/samples/html-to-pdf.md)
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- [Configuring multiline titles in PDF using Swift for iOS](/guides/ios/samples/multiline-pdf-title.md)
- [Open AES-encrypted PDF in Swift for iOS](/guides/ios/samples/open-aes-encrypted-pdf.md)
- [Link annotation view customization in Swift for iOS](/guides/ios/samples/link-annotation-view-customization.md)
- [Monitor UI touches using Swift for iOS](/guides/ios/samples/monitor-touches.md)
- [Encrypt and decrypt a PDF using Swift for iOS](/guides/ios/samples/encrypt-decrypt-pdf.md)
- [Add overlay views to PDF in Swift for iOS](/guides/ios/samples/overlay-views.md)
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- [Face redaction in document using Swift for iOS](/guides/ios/samples/face-redaction-in-pdf.md)
- [Configure PDF annotation toolbar using Swift for iOS](/guides/ios/samples/manual-toolbar-setup.md)
- [OCR PDF using Swift for iOS](/guides/ios/samples/ocr-pdf.md)
- [Password Not Preset](/guides/ios/samples/password-not-preset.md)
- [Lazy load PDF annotations in Swift for iOS](/guides/ios/samples/lazy-load-pdf-annotations.md)
- [Customize PDF editor toolbar using Swift for iOS](/guides/ios/samples/pdf-editor-toolbar-customization.md)
- [Custom PDF page labels in the sharing UI in Swift for iOS](/guides/ios/samples/page-labels-in-sharing-ui.md)
- [Allow freeform image annotation resizing in Swift for iOS](/guides/ios/samples/freeform-image-resize.md)
- [Custom saving options after editing PDF in Swift for iOS](/guides/ios/samples/pdf-editor-custom-saving-confirmation.md)
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- [Custom page template in PDF editor using Swift for iOS](/guides/ios/samples/pdf-editor-custom-templates.md)
- [Select free text annotation in PDF using Swift for iOS](/guides/ios/samples/select-free-text-annotations.md)
- [Simplifying the font picker for text annotation using Swift for iOS](/guides/ios/samples/simple-font-picker.md)
- [Customize iOS annotation inspector color presets](/guides/ios/samples/preset-customization.md)
- [Enable saving confirmation when exiting PDF in Swift for iOS](/guides/ios/samples/save-confirmation.md)
- [Customize scrubber bar with buttons using Swift for iOS](/guides/ios/samples/scrubber-bar-with-buttons.md)
- [Redact text in PDF using Swift for iOS](/guides/ios/samples/pdf-redaction.md)
- [Search multiple PDF files using Swift for iOS](/guides/ios/samples/search-multiple-pdf-files.md)
- [Customize view controller for screen mirroring in Swift for iOS](/guides/ios/samples/screen-mirroring.md)
- [Convert stamp into a PDF button in Swift for iOS](/guides/ios/samples/stamp-button.md)
- [Select all text in a PDF using Swift for iOS](/guides/ios/samples/select-all-pdf-text.md)
- [Simplifying the annotation inspector using Swift for iOS](/guides/ios/samples/simple-annotation-inspector.md)
- [Generate a PDF report using Swift for iOS](/guides/ios/samples/generate-pdf-report.md)
- [Hide or reveal an area in a PDF using Swift for iOS](/guides/ios/samples/hide-reveal-area-in-pdf.md)
- [Multi-user PDF collaboration using Swift for iOS](/guides/ios/samples/multi-user-pdf-collaboration.md)
- [Display measurements on PDF pages or spreads in Swift for iOS](/guides/ios/samples/measurements-on-pages-spreads.md)
- [Using Instant JSON to collaborate on PDFs in Swift for iOS](/guides/ios/samples/instant-json.md)
- [Show PDF download progress in Swift for iOS](/guides/ios/samples/pdf-download-progress.md)
- [Compare PDF documents using Swift for iOS](/guides/ios/samples/pdf-document-comparison.md)
- [PDF page scale and resize using Swift for iOS](/guides/ios/samples/pdf-page-scaling.md)
- [PDF collaboration using Swift for iOS](/guides/ios/samples/pdf-collaboration.md)
- [Highlight text in PDF using Swift for iOS](/guides/ios/samples/highlight-text-in-pdf.md)
- [Cycle through PDF documents using Swift for iOS](/guides/ios/samples/page-view-controller.md)
- [PDF text redaction using regex in Swift for iOS](/guides/ios/samples/redact-pdf-text-using-regex.md)
- [PDF magazine reader using Swift for iOS](/guides/ios/samples/pdf-magazine-reader.md)
- [Search and redact text in a PDF using Swift for iOS](/guides/ios/samples/search-and-redact-pdf-text.md)
- [Programmatically add a signature to all PDF pages using Swift for iOS](/guides/ios/samples/sign-all-pdf-pages.md)
- [Store PDF annotations for multiple users in Swift for iOS](/guides/ios/samples/store-multiple-user-annotations.md)
- [Show author name on annotation selection in Swift for iOS](/guides/ios/samples/show-author-name-on-annotation-selection.md)
- [Customize PDF view settings in Swift for iOS](/guides/ios/samples/pdf-view-settings.md)
- [Auto-save PDF annotation changes in Swift for iOS](/guides/ios/samples/save-as-pdf.md)
- [Show note controller for highlights in Swift for iOS](/guides/ios/samples/show-note-controller-for-highlights.md)
- [Swiftui Sharing](/guides/ios/samples/swiftui-sharing.md)
- [Embed a SwiftUI view inside a page view on iOS](/guides/ios/samples/swiftui-on-page-view.md)
- [Programmatically go to PDF outline in Swift for iOS](/guides/ios/samples/programmatically-go-to-outline.md)
- [Show or hide PDF annotations using Swift for iOS](/guides/ios/samples/toggle-annotation-visibility.md)
- [Enable fixed PDF toolbar position in Swift for iOS](/guides/ios/samples/top-toolbar-position.md)
- [Encrypt disk cache when rendering PDF in Swift for iOS](/guides/ios/samples/encrypted-cache.md)
- [Show multiple files as a single PDF using Swift for iOS](/guides/ios/samples/show-multiple-files-in-pdf.md)
- [Use PDFViewController with SwiftUI for iOS](/guides/ios/samples/swiftui.md)
- [Create a custom PDF navigation bar with SwiftUI for iOS](/guides/ios/samples/swiftui-custom-navigation-bar.md)
- [SwiftUI split screen: Display two PDF views side by side on iOS](/guides/ios/samples/swiftui-split-screen.md)
- [Programtically search a PDF using Swift for iOS](/guides/ios/samples/search-without-controller.md)
- [Update configuration when rotating PDF in Swift for iOS](/guides/ios/samples/update-configuration-when-rotating.md)
- [Render drawings on PDF pages using Swift for iOS](/guides/ios/samples/pdf-page-drawing.md)
- [Convert MS Office (DOCX, XLSX, PPTX) to PDF in Swift for iOS](/guides/ios/samples/office-to-pdf-conversion.md)
- [Show multiple PDFs with tabbed UI using Swift for iOS](/guides/ios/samples/tabbed-bar.md)
- [Add SwiftUI sidebar next to PDF view on iOS](/guides/ios/samples/swiftui-sidebar.md)
- [PDF streaming with SwiftUI for iOS](/guides/ios/samples/streaming-pdf-swiftui.md)
- [Import and export annotations in XFDF using Swift for iOS](/guides/ios/samples/xfdf-annotation-provider.md)
- [Customize PDF annotation toolbar with SwiftUI for iOS](/guides/ios/samples/swiftui-annotationt-toolbar.md)
- [Custom annotation inspector with SwiftUI for iOS](/guides/ios/samples/swiftui-custom-annotation-inspector.md)
- [Sticky header for PDF thumbnail view in Swift for iOS](/guides/ios/samples/sticky-header.md)
- [PDF streaming using Swift for iOS](/guides/ios/samples/streaming-pdf.md)
- [Create a custom PDF page setting view in SwiftUI for iOS](/guides/ios/samples/swiftui-settings.md)
- [Add a snake game inside a PDF in Swift for iOS](/guides/ios/samples/snake.md)
- [Integrate UIStoryboard with PDFViewController in Swift for iOS](/guides/ios/samples/storyboard.md)
- [PDF form examples using Swift for iOS](/guides/ios/samples/pdf-forms.md)
- [Display PDF annotations on layers in Swift for iOS](/guides/ios/samples/pdf-annotation-layers.md)
- [Aviation example: Displaying flight plan PDF in Swift for iOS](/guides/ios/samples/aviation.md)
- [Getting started with iOS playground](/guides/ios/samples/playground.md)