Add Calculator to PDF Using JavaScript on iOS

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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 CalculatorExample: Example {
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    override init() {
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        super.init()
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        title = "Calculator in a PDF with embedded JavaScript"
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        contentDescription = "Example showing JavaScript support in Nutrient."
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        category = .miscellaneous
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        priority = 1
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    }
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    override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController {
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        let document = AssetLoader.document(for: "Calculator.pdf")
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        // Create a custom configuration that hides the UI elements that are not relevant for this example.
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        let configuration = PDFConfiguration {
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            $0.thumbnailBarMode = .none
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            $0.isPageLabelEnabled = false
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            $0.shouldShowUserInterfaceOnViewWillAppear = false
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        }
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        let pdfController = PDFViewController(document: document, configuration: configuration)
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        // Hide the default PDFViewController navigation items.
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        pdfController.navigationItem.rightBarButtonItems = []
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        return pdfController
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    }
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}