Disable bookmark editing in PDF using Swift for iOS

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//
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//  Copyright © 2018-2026 PSPDFKit GmbH. All rights reserved.
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//
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//  The Nutrient sample applications are licensed with a modified BSD license.
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//  Please see License for details. This notice may not be removed from this file.
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//
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import PSPDFKit
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import PSPDFKitUI
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class DisableBookmarkEditingExample: Example {
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    override init() {
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        super.init()
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        contentDescription = "Shows how to disable bookmark editing using Document Features"
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        category = .subclassing
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        priority = 260
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    }
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    override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController {
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        let document = AssetLoader.writableDocument(for: .welcome, overrideIfExists: false)
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        // Add the custom source to the document's features.
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        let documentFeaturesSource = DisableBookmarkEditingDocumentFeaturesSource()
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        document.features.add([documentFeaturesSource])
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        let controller = PDFViewController(document: document)
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        controller.navigationItem.setRightBarButtonItems([controller.outlineButtonItem], animated: false)
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        return controller
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    }
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}
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private class DisableBookmarkEditingDocumentFeaturesSource: NSObject, PDFDocumentFeaturesSource {
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    weak var features: PDFDocumentFeatures?
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    // Return false to disable bookmark editing.
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    var canEditBookmarks: Bool {
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        false
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    }
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}