--- title: "Using Instant JSON to collaborate on PDFs in Swift for iOS" canonical_url: "https://www.nutrient.io/guides/ios/samples/instant-json/" md_url: "https://www.nutrient.io/guides/ios/samples/instant-json.md" last_updated: "2026-06-08T09:14:14.413Z" description: "A collection of examples showing how to use the Instant JSON data exchange format. Get additional resources by visiting our Instant JSON guide." --- # Using Instant JSON to collaborate on PDFs in Swift for iOS A collection of examples showing how to use the Instant JSON data exchange format. Get additional resources by visiting our [Instant JSON guide](/guides/ios/json.md). [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 © 2018-2026 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 PSPDFKit import PSPDFKitUI private func withFirstProvider(of document: Document, perform: (PDFDocumentProvider) -> T ) -> T { return perform(document.documentProviders.first!) } class InstantJSONAnnotationExample: Example { override init() { super.init() title = "Instant JSON - Annotation" contentDescription = "Convert an annotation to and from Instant JSON." category =.annotations priority = 300 } override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController { let document = AssetLoader.writableDocument(for:.welcome, overrideIfExists: true) // Generally the annotation's Instant JSON is stored and loaded from an external file. In this example, we are using a hardcoded string that matches the Instant JSON. let inkAnnotationJsonString = """ { "bbox": [89.586334228515625, 98.5791015625, 143.12948608398438, 207.1583251953125], "isDrawnNaturally": false, "lineWidth": 5, "lines": { "intensities": [ [0.5, 0.5, 0.5], [0.5, 0.5, 0.5] ], "points": [ [[92.086334228515625, 101.07916259765625], [92.086334228515625, 202.15826416015625], [138.12950134277344, 303.2374267578125]], [[184.17266845703125, 101.07916259765625], [184.17266845703125, 202.15826416015625], [230.2158203125, 303.2374267578125]] ] }, "opacity": 1, "pageIndex": 0, "strokeColor": "#AA47BE", "type": "pspdfkit/ink", "v": 1 } """ // Convert the JSON string to NSData let data = inkAnnotationJsonString.data(using:.utf8)! // Create annotation from Instant JSON data and add the annotation to the document. try! document.documentProviders.first!.addAnnotation(fromInstantJSON: data) let controller = InstantJSONAnnotationPDFController(document: document) let exportButton = UIBarButtonItem(title: "Export Instant JSON", style:.plain, target: controller, action: #selector(InstantJSONAnnotationPDFController.exportInstantJSON(_:))) controller.navigationItem.rightBarButtonItems = [exportButton] return controller } // MARK: Controller class InstantJSONAnnotationPDFController: PDFViewController { // MARK: Actions @objc func exportInstantJSON(_ sender: AnyObject) { // The document's first ink annotation on the first page. let inkAnnotation = self.document!.annotationsForPage(at: 0, type:.ink).first! // Generate Instant JSON data for the Ink annotation. let data = try! inkAnnotation.generateInstantJSON() // Convert the data to JSON string. let jsonString = String(data: data, encoding:.utf8) // The data should be stored in an external file. In this example we simply display in an alert. let alert = UIAlertController(title: "Instant JSON", message: jsonString, preferredStyle:.alert) alert.addAction(UIAlertAction(title: "Dismiss", style:.default)) self.present(alert, animated: true, completion: nil) } } } class InstantJSONDocumentExample: Example { override init() { super.init() title = "Instant JSON - Document" contentDescription = "Generate and apply Instant JSON for a document." category =.annotations priority = 301 } override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController { let document = AssetLoader.document(for:.welcome) // Add an ink annotation. let annotation = InkAnnotation() annotation.lineWidth = 5 // These points are in the PDF page coordinate space, which puts the origin in the bottom-left corner of the page with y increasing upwards. annotation.lines = [ [CGPoint(x: 100, y: 100), CGPoint(x: 100, y: 200), CGPoint(x: 150, y: 300)].map { DrawingPoint(cgPoint: $0) }, [CGPoint(x: 200, y: 100), CGPoint(x: 200, y: 200), CGPoint(x: 250, y: 300)].map { DrawingPoint(cgPoint: $0) }, ] annotation.color = UIColor(red: 0.667, green: 0.279, blue: 0.748, alpha: 1) annotation.pageIndex = 0 document.add(annotations: [annotation]) let controller = InstantJSONDocumentPDFController(document: document) { /* Instant Document JSON stores a set of changes relative to the saved state of a document. The changes must be applied back to exactly the same document. This means it’s important that we don’t modify the PDF file or allow annotations to be saved to Nutrient’s automated external annotation storage. We don’t change the annotationSaveMode because that also disables the UI to create annotations. Instead we disable autosave. */ $0.isAutosaveEnabled = false } let exportButton = UIBarButtonItem(title: "Export Instant JSON", style:.plain, target: controller, action: #selector(InstantJSONDocumentPDFController.exportInstantJSON(_:))) controller.navigationItem.rightBarButtonItems = [exportButton, controller.annotationButtonItem] return controller } // MARK: Controller class InstantJSONDocumentPDFController: PDFViewController { // MARK: Actions @objc func exportInstantJSON(_ sender: AnyObject) { // Generate Instant JSON for the original document. // The data is generally stored stored in an external file in order to be retrieved later when reloading the document. let data = withFirstProvider(of: self.document!) { return try! self.document!.generateInstantJSON(from: $0) } // Reload the document let reloadedDocument = AssetLoader.document(for:.welcome) // Display the original reloaded document without Instant JSON reloadedDocument.title = "Reloaded Document without Instant JSON" self.document = reloadedDocument // Apply the Instant JSON data after two seconds DispatchQueue.main.asyncAfter(deadline:.now() + 2) { [weak self] in guard let self else { return } let jsonContainer = DataContainerProvider(data: data) withFirstProvider(of: reloadedDocument) { try! reloadedDocument.applyInstantJSON(fromDataProvider: jsonContainer, to: $0, lenient: false) } // And reload data. reloadedDocument.title = "Reloaded Document with Instant JSON" self.reloadData() } } } class InstantJSONAttachmentExample: Example { override init() { super.init() title = "Instant JSON - Attachment" contentDescription = "Write and attach Instant JSON binary data for a vector stamp annotation." category =.annotations priority = 302 } override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController { let document = AssetLoader.writableDocument(for:.welcome, overrideIfExists: true) let logoURL = AssetLoader.assetURL(for: "PSPDFKit Logo.pdf") let vectorStamp = StampAnnotation() vectorStamp.boundingBox = CGRect(x: 50, y: 724, width: 200, height: 200) vectorStamp.appearanceStreamGenerator = FileAppearanceStreamGenerator(fileURL: logoURL) document.add(annotations: [vectorStamp]) let controller = InstantJSONAttachmentPDFController(document: document) let exportButton = UIBarButtonItem(title: "Export Instant JSON Attachment", style:.plain, target: controller, action: #selector(InstantJSONAttachmentPDFController.exportInstantJSON(_:))) controller.navigationItem.rightBarButtonItems = [exportButton] return controller } // MARK: Controller class InstantJSONAttachmentPDFController: PDFViewController { // MARK: Actions @objc func exportInstantJSON(_ sender: AnyObject) { // The document's first stamp annotation on the first page. let stampAnnotation = self.document!.annotationsForPage(at: 0, type:.stamp).first! // Generate Instant JSON data for the stamp annotation. let jsonData = try! stampAnnotation.generateInstantJSON() // Write the binary to the data sink. // In a production environment, you need to persist the data sink's data (dataSink.data) in an external file so you can retrieve and attach it later when reloading the document. let dataSink = DataContainerSink(data: nil) if stampAnnotation.hasBinaryInstantJSONAttachment { try! stampAnnotation.writeBinaryInstantJSONAttachment(to: dataSink) } // Reload the document let reloadedDocument = AssetLoader.writableDocument(for:.welcome, overrideIfExists: true) // Display the original reloaded document without instant JSON reloadedDocument.title = "Reloaded Document without Instant JSON" self.document = reloadedDocument // Apply the Instant JSON data after two seconds DispatchQueue.main.asyncAfter(deadline:.now() + 2) { [weak self] in guard let self else { return } let attachmentData = DataContainerProvider(data: dataSink.data) try! reloadedDocument.documentProviders.first!.addAnnotation(fromInstantJSON: jsonData, attachmentDataProvider: attachmentData) // And reload data. reloadedDocument.title = "Reloaded Document with Instant JSON" self.reloadData() } } } } } ``` This code sample is an example that illustrates how to use our SDK. Please adapt it to your specific use case. --- ## Related pages - [Allow freeform image annotation resizing in Swift for iOS](/guides/ios/samples/freeform-image-resize.md) - [Creating effective link annotations on iOS](/guides/ios/samples/annotations.md) - [Add file annotation to PDF in Swift for iOS](/guides/ios/samples/add-file-annotation-with-embedded-file.md) - [Image annotations in Swift for iOS](/guides/ios/samples/annotate-images.md) - [Add an Apple Maps widget to a PDF page in Swift for iOS](/guides/ios/samples/add-map-widget-to-pdf.md) - [Add video annotation to PDF in Swift for iOS](/guides/ios/samples/add-video-annotation-to-pdf.md) - [Add annotation buttons to PDF toolbar in Swift for iOS](/guides/ios/samples/annotation-buttons-in-navigation-bar.md) - [Create an always-dark annotation toolbar in Swift for iOS](/guides/ios/samples/always-dark-annotation-toolbar.md) - [Create a custom appearance stream generator in Swift for iOS](/guides/ios/samples/appearance-stream-generator.md) - [Select PDF text and create a note in Swift for iOS](/guides/ios/samples/create-note-from-selection.md) - [Maintain annotation aspect ratio in Swift](/guides/ios/samples/aspect-ratio-conserving-resizing.md) - [Write PDF annotations to XFDF in Swift for iOS](/guides/ios/samples/annotations-to-xfdf.md) - [Embed Nutrient as a child view controller in Swift for iOS](/guides/ios/samples/child-view-controller-using-parent-navigation-bar.md) - [PDFViewController controller state in Swift for iOS](/guides/ios/samples/controller-state.md) - [Enable auto-save in PDF using Swift for iOS](/guides/ios/samples/auto-saving-pdf.md) - [Blur PDF page in Swift for iOS](/guides/ios/samples/blur-pdf-pages.md) - [Create link annotations in PDF using Swift for iOS](/guides/ios/samples/create-link-annotation-in-pdf.md) - [Create PDF bookmark with UI in Swift for iOS](/guides/ios/samples/create-pdf-bookmark-name-ui.md) - [Custom PDF stamp annotation in Swift for iOS](/guides/ios/samples/custom-pdf-stamp-annotations.md) - [Add custom font sizes to free text keyboard in Swift for iOS](/guides/ios/samples/custom-buttons-free-text-keyboard-toolbar.md) - [Customize blend modes in stamp annotations in Swift for iOS](/guides/ios/samples/annotation-inspector-stamp-blend-mode.md) - [Add a custom free text input accessory in Swift for iOS](/guides/ios/samples/custom-free-text-input-accessory.md) - [Create password-protected PDF in Swift for iOS](/guides/ios/samples/create-password-protected-pdf.md) - [Custom Comments Ui](/guides/ios/samples/custom-comments-ui.md) - [Customize PDF tab titles in Swift for iOS](/guides/ios/samples/custom-tabbed-bar-title.md) - [Customize PDF annotation toolbar in Swift for iOS](/guides/ios/samples/customize-pdf-annotation-toolbar.md) - [Customize PDF sharing options in Swift for iOS](/guides/ios/samples/custom-pdf-sharing-options.md) - [Custom thumbnail PDF view filter in Swift for iOS](/guides/ios/samples/custom-thumbnail-view-controller-filter.md) - [Customize pencil interactions on PDF using Swift for iOS](/guides/ios/samples/custom-pencil-interaction-action.md) - [Customize PDF outline in Swift for iOS](/guides/ios/samples/custom-pdf-outline-controller.md) - [Customize the search result cell in Swift for iOS](/guides/ios/samples/custom-search-result-cell.md) - [Customize the PDF search highlight color in Swift for iOS](/guides/ios/samples/custom-search-highlight-color.md) - [Disable bookmark editing in PDF using Swift for iOS](/guides/ios/samples/disable-bookmark-editing.md) - [Present a confirmation sheet for iOS annotations](/guides/ios/samples/confirm-annotation-deletion.md) - [Continiously create free text annotations in Swift for iOS](/guides/ios/samples/create-free-text-annotations-continuously.md) - [Add calculator to PDF using JavaScript on iOS](/guides/ios/samples/calculator.md) - [Customize the filename of shared PDF in Swift for iOS](/guides/ios/samples/custom-sharing-filenames.md) - [Disable annotations reviews in PDF using Swift for iOS](/guides/ios/samples/disable-annotation-reviews.md) - [Customized note annotation view controller in Swift for iOS](/guides/ios/samples/customized-note-annotation-view-controller.md) - 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[Prepare PDF to embed PAdES digital signature in Swift for iOS](/guides/ios/samples/contained-pades-digital-signature.md) - [Prepare PDF to capture digital signature in Swift for iOS](/guides/ios/samples/contained-digital-signatures.md) - [Customize the annotation selection knobs in Swift for iOS](/guides/ios/samples/custom-selection-knobs.md) - [Customize the annotations list in Swift for iOS](/guides/ios/samples/customizing-annotation-list.md) - [Customize PDF form appearance in Swift for iOS](/guides/ios/samples/customizing-pdf-form-appearance.md) - [Customize vertical annotation toolbar in Swift for iOS](/guides/ios/samples/custom-vertical-annotation-toolbar.md) - [Apply XFDF annotations and save it as new PDF in Swift for iOS](/guides/ios/samples/embedded-xfdf-annotation-provider.md) - [Exit PDF drawing mode automatically in Swift for iOS](/guides/ios/samples/exit-drawing-mode-automatically.md) - [Add video, audio, image annotation to PDF in Swift for iOS](/guides/ios/samples/gallery.md) - [Create PDF programmatically in Swift for iOS](/guides/ios/samples/create-pdf-programmatically.md) - [Encrypt and decrypt a PDF using Swift for iOS](/guides/ios/samples/encrypt-decrypt-pdf.md) - [PDF highlight annotation blend mode menu in Swift for iOS](/guides/ios/samples/highlight-annotation-blend-mode-menu.md) - [Fixed-sized PDF stamp annotations in Swift for iOS](/guides/ios/samples/floating-pdf-stamp-annotation.md) - [Disable bookmark renaming in PDF using Swift for iOS](/guides/ios/samples/disable-bookmark-renaming.md) - [Customize PDF page lables in Swift for iOS](/guides/ios/samples/custom-page-label.md) - [Customize annotation link border color in Swift for iOS](/guides/ios/samples/custom-link-border-color.md) - [Save reading position in PDF using Swift for iOS](/guides/ios/samples/document-view-state-restoration.md) - [Document With Original Url Set](/guides/ios/samples/document-with-original-url-set.md) - [Add analytics to PDF components in Swift for iOS](/guides/ios/samples/analytics.md) - [Display PDF in inbox directory using Swift for iOS](/guides/ios/samples/display-pdf-inbox.md) - [Add watermark to all PDF pages using Swift for iOS](/guides/ios/samples/draw-watermark-on-pdf-pages.md) - [Collaborating on PDFs in board meetings using Swift for iOS](/guides/ios/samples/board-meeting.md) - [Generate a PDF report using Swift for iOS](/guides/ios/samples/generate-pdf-report.md) - [Draw all PDF annotations as overlays in Swift for iOS](/guides/ios/samples/draw-annotations-as-overlay.md) - [Clear all PDF annotations with a button in Swift for iOS](/guides/ios/samples/custom-button-in-annotation-toolbar.md) - [Face redaction in document using Swift for iOS](/guides/ios/samples/face-redaction-in-pdf.md) - [Custom PDF bookmark provider in Swift for iOS](/guides/ios/samples/custom-pdf-bookmark-provider.md) - [Customize PDF view margins using Swift for iOS](/guides/ios/samples/dynamic-margins.md) - [Disable PDF annotation editing in Swift for iOS](/guides/ios/samples/disable-annotation-editing.md) - [LMS example: Take and grade an exam using Swift for iOS](/guides/ios/samples/e-learning.md) - [Encrypted Xfdf Annotation Provider](/guides/ios/samples/encrypted-xfdf-annotation-provider.md) - [Enable fixed PDF toolbar position in Swift for iOS](/guides/ios/samples/top-toolbar-position.md) - [Add image gallery to PDF in Swift for iOS](/guides/ios/samples/add-image-gallery-to-pdf.md) - [Add a custom cloudy rectangle annotation to a PDF in Swift for iOS](/guides/ios/samples/add-custom-cloudy-rectangle.md) - [Encrypt disk cache when rendering PDF in Swift for iOS](/guides/ios/samples/encrypted-cache.md) - [Update configuration when rotating PDF in Swift for iOS](/guides/ios/samples/update-configuration-when-rotating.md) - [Monitor UI touches using Swift for iOS](/guides/ios/samples/monitor-touches.md) - [Add an image signature to PDF in Swift for iOS](/guides/ios/samples/add-image-signature-to-pdf-programmatically.md) - [Add overlay views to PDF in Swift for iOS](/guides/ios/samples/overlay-views.md) - 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[Embed PDFViewController as a child in iOS](/guides/ios/samples/child-view-controller.md) - [Highlight text in PDF using Swift for iOS](/guides/ios/samples/highlight-text-in-pdf.md) - [Lazy load PDF annotations in Swift for iOS](/guides/ios/samples/lazy-load-pdf-annotations.md) - [Configuring PDF reader in Swift for iOS](/guides/ios/samples/e-reader.md) - [Show PDF download progress in Swift for iOS](/guides/ios/samples/pdf-download-progress.md) - [Custom annotation provider in Swift for iOS](/guides/ios/samples/custom-annotation-provider.md) - [PDF page scale and resize using Swift for iOS](/guides/ios/samples/pdf-page-scaling.md) - [Add copyright watermark to PDF in Swift for iOS](/guides/ios/samples/add-copyright-watermark-to-pdf.md) - [Programmatically go to PDF outline in Swift for iOS](/guides/ios/samples/programmatically-go-to-outline.md) - [Enable saving confirmation when exiting PDF in Swift for iOS](/guides/ios/samples/save-confirmation.md) - [Customize iOS annotation inspector color presets](/guides/ios/samples/preset-customization.md) - 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[Create a custom PDF navigation bar with SwiftUI for iOS](/guides/ios/samples/swiftui-custom-navigation-bar.md) - [Show or hide PDF annotations using Swift for iOS](/guides/ios/samples/toggle-annotation-visibility.md) - [Toggle PDF form field highlight color in Swift for iOS](/guides/ios/samples/pdf-form-highlight-color.md) - [Search multiple PDF files using Swift for iOS](/guides/ios/samples/search-multiple-pdf-files.md) - [Download PDF from URL using Swift for iOS](/guides/ios/samples/remote-document-url.md) - [Customize view controller for screen mirroring in Swift for iOS](/guides/ios/samples/screen-mirroring.md) - [Custom PDF page labels in the sharing UI in Swift for iOS](/guides/ios/samples/page-labels-in-sharing-ui.md) - [Simplifying the annotation inspector using Swift for iOS](/guides/ios/samples/simple-annotation-inspector.md) - [SwiftUI split screen: Display two PDF views side by side on iOS](/guides/ios/samples/swiftui-split-screen.md) - [Embed a SwiftUI view inside a page view on iOS](/guides/ios/samples/swiftui-on-page-view.md) - [Customize PDF editor toolbar using Swift for iOS](/guides/ios/samples/pdf-editor-toolbar-customization.md) - [Rotate PDF page using Swift for iOS](/guides/ios/samples/rotate-pdf-page.md) - [Remove password from PDF using Swift for iOS](/guides/ios/samples/remove-pdf-password.md) - [Custom page template in PDF editor using Swift for iOS](/guides/ios/samples/pdf-editor-custom-templates.md) - [Open AES-encrypted PDF in Swift for iOS](/guides/ios/samples/open-aes-encrypted-pdf.md) - [Show multiple files as a single PDF using Swift for iOS](/guides/ios/samples/show-multiple-files-in-pdf.md) - [Render drawings on PDF pages using Swift for iOS](/guides/ios/samples/pdf-page-drawing.md) - [Use PDFViewController with SwiftUI for iOS](/guides/ios/samples/swiftui.md) - [Customize PDF view settings in Swift for iOS](/guides/ios/samples/pdf-view-settings.md) - [Select all text in a PDF using Swift for iOS](/guides/ios/samples/select-all-pdf-text.md) - [Link annotation view customization in Swift for iOS](/guides/ios/samples/link-annotation-view-customization.md) - [Aviation example: Displaying flight plan PDF in Swift for iOS](/guides/ios/samples/aviation.md) - [Display building floor plans in iOS with Swift](/guides/ios/samples/construction.md) - [Multi-user PDF collaboration using Swift for iOS](/guides/ios/samples/multi-user-pdf-collaboration.md) - [Programatically create PDF annotations in Swift for iOS](/guides/ios/samples/add-annotations-to-pdf-programmatically.md) - [Convert MS Office (DOCX, XLSX, PPTX) to PDF in Swift for iOS](/guides/ios/samples/office-to-pdf-conversion.md) - [OCR PDF using Swift for iOS](/guides/ios/samples/ocr-pdf.md) - [Import and export annotations in XFDF using Swift for iOS](/guides/ios/samples/xfdf-annotation-provider.md) - [Search and redact text in a PDF using Swift for iOS](/guides/ios/samples/search-and-redact-pdf-text.md) - [Configure PDF annotation toolbar using Swift for iOS](/guides/ios/samples/manual-toolbar-setup.md) - [Show author name on annotation selection in Swift for iOS](/guides/ios/samples/show-author-name-on-annotation-selection.md) - [Programmatically add a signature to all PDF pages using Swift for iOS](/guides/ios/samples/sign-all-pdf-pages.md) - [Compare PDF documents using Swift for iOS](/guides/ios/samples/pdf-document-comparison.md) - [PDF streaming using Swift for iOS](/guides/ios/samples/streaming-pdf.md) - [PDF streaming with SwiftUI for iOS](/guides/ios/samples/streaming-pdf-swiftui.md) - [PDF collaboration using Swift for iOS](/guides/ios/samples/pdf-collaboration.md) - [Create a custom PDF page setting view in SwiftUI for iOS](/guides/ios/samples/swiftui-settings.md) - [Sticky header for PDF thumbnail view in Swift for iOS](/guides/ios/samples/sticky-header.md) - [Customize PDF annotation toolbar with SwiftUI for iOS](/guides/ios/samples/swiftui-annotationt-toolbar.md) - [Cycle through PDF documents using Swift for iOS](/guides/ios/samples/page-view-controller.md) - [PDF magazine reader using Swift for iOS](/guides/ios/samples/pdf-magazine-reader.md) - [Show multiple PDFs with tabbed UI using Swift for iOS](/guides/ios/samples/tabbed-bar.md) - [Custom annotation inspector with SwiftUI for iOS](/guides/ios/samples/swiftui-custom-annotation-inspector.md) - [Store PDF annotations for multiple users in Swift for iOS](/guides/ios/samples/store-multiple-user-annotations.md) - [Auto-save PDF annotation changes in Swift for iOS](/guides/ios/samples/save-as-pdf.md) - [Persist view settings using Swift for iOS](/guides/ios/samples/persist-view-settings.md) - [Swiftui Sharing](/guides/ios/samples/swiftui-sharing.md) - [Create email snippet when sharing PDF in Swift for iOS](/guides/ios/samples/predefined-email-body.md) - [Display measurements on PDF pages or spreads in Swift for iOS](/guides/ios/samples/measurements-on-pages-spreads.md) - [Add a snake game inside a PDF in Swift for iOS](/guides/ios/samples/snake.md) - [Hide or reveal an area in a PDF using Swift for iOS](/guides/ios/samples/hide-reveal-area-in-pdf.md) - [PDF text redaction using regex in Swift for iOS](/guides/ios/samples/redact-pdf-text-using-regex.md) - [Add SwiftUI sidebar next to PDF view on iOS](/guides/ios/samples/swiftui-sidebar.md) - [PDF form examples using Swift for iOS](/guides/ios/samples/pdf-forms.md) - [Integrate UIStoryboard with PDFViewController in Swift for iOS](/guides/ios/samples/storyboard.md) - [Display PDF annotations on layers in Swift for iOS](/guides/ios/samples/pdf-annotation-layers.md)