Convert Stamp into a PDF Button in Swift for iOS

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//
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//  Copyright © 2017-2025 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 StampButtonExample: Example, PDFViewControllerDelegate {
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    override init() {
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        super.init()
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        title = "Stamp Annotation Button"
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        contentDescription = "Uses a stamp annotation as button."
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        category = .annotations
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        priority = 130
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    }
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    override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController? {
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        let document = AssetLoader.document(for: .annualReport)
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        document.annotationSaveMode = .disabled
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        let imageStamp = StampAnnotation()
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        imageStamp.image = UIImage(named: "exampleimage.jpg")
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        imageStamp.boundingBox = CGRect(x: 100.0, y: 100.0, width: imageStamp.image!.size.width / 4.0, height: imageStamp.image!.size.height / 4.0)
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        imageStamp.pageIndex = 0
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        // We need to define an action to get a highlight.
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        // You can also use an empty script and do custom processing in the didTapOnAnnotation: delegate.
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        imageStamp.additionalActions = [.mouseUp: JavaScriptAction(script: "app.alert(\"Hello, it's me. I was wondering...\");")]
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        document.add(annotations: [imageStamp])
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        let pdfController = PDFViewController(document: document, delegate: self)
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        return pdfController
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    }
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    // MARK: - PDFViewControllerDelegate
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    private func pdfViewController(_: PDFViewController, didTapOn annotation: Annotation, annotationPoint: CGPoint, annotationView: AnnotationPresenting, pageView: PDFPageView, viewPoint: CGPoint) -> Bool {
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        return false
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    }
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}