Display PDFViewController in Popover using 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 PopoverPresentationExample: Example {
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    override init() {
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        super.init()
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        title = "PDFViewController in Popover"
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        contentDescription = "Uses a vanilla PDFViewController presented in a popover presentation controller."
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        category = .controllerCustomization
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        wantsModalPresentation = true
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        customizations = { container in
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            container.modalPresentationStyle = .popover
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            container.popoverPresentationController?.permittedArrowDirections = [.up, .down]
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        }
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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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        let controller = PDFViewController(document: document)
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        controller.preferredContentSize = CGSize(width: 640, height: 480)
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        return controller
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    }
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}