Disable bookmark renaming in PDF using Swift for iOS

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//
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//  Copyright © 2017-2026 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 DisableBookmarkRenameExample: Example {
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    override init() {
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        super.init()
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        contentDescription = "Shows how to use a custom bookmark cell to disable bookmark renaming"
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        category = .subclassing
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        priority = 250
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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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        let controller = PDFViewController(document: document) {
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            // Use our PSPDFBookmarkCell subclass which has disabled bookmark editing.
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            $0.overrideClass(BookmarkCell.self, with: DisableRenameBookmarkCell.self)
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        }
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        controller.navigationItem.setRightBarButtonItems([controller.outlineButtonItem, controller.bookmarkButtonItem], animated: false)
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        return controller
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    }
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}
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class DisableRenameBookmarkCell: BookmarkCell {
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    /// Overriding this method and returning false disables the bookmark name editing when the cell is in edit mode.
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    override func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
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        return false
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    }
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}