Custom Comments UI

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//
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//  Copyright © 2018-2025 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 CustomCommentsViewControllerExample: Example {
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    override init() {
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        super.init()
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        title = "Custom Comments (Notes) UI"
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        contentDescription = "Replaces PSPDFNoteAnnotationViewController with a custom view controller."
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        category = .annotations
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        priority = 72
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    }
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    override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController? {
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        let document = AssetLoader.document(for: .welcome)
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        let controller = PDFViewController(document: document) {
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            $0.overrideClass(PDFPageView.self, with: CustomPageView.self)
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        }
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        return controller
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    }
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}
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private class CustomPageView: PDFPageView {
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    override func presentComments(for annotation: Annotation, options: [PresentationOption: Any] = [:], animated: Bool = true, completion: (() -> Void)? = nil) -> UIViewController? {
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        let commentsViewController = CustomCommentsViewController()
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        let navigationController = UINavigationController(rootViewController: commentsViewController)
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        presentationContext?.actionDelegate.present(navigationController, options: options, animated: animated, sender: nil, completion: completion)
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        return navigationController
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    }
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}
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private class CustomCommentsViewController: UIViewController {
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    init() {
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        super.init(nibName: nil, bundle: nil)
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        navigationItem.rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .done, target: self, action: #selector(dismiss(sender:)))
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    }
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    required init?(coder aDecoder: NSCoder) {
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        fatalError("init(coder:) has not been implemented")
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    }
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    override func viewDidLoad() {
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        super.viewDidLoad()
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        view.backgroundColor = UIColor.psc_systemBackground
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    }
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    @objc func dismiss(sender: UIBarButtonItem) {
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        dismiss(animated: true, completion: nil)
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    }
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}