Add a Bottom Inset to the User Interface in Swift for iOS

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//
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//  Copyright © 2021-2025 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 InsetUserInterfaceExample: Example {
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    override init() {
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        super.init()
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        title = "Inset User Interface"
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        contentDescription = "Make space for custom UI elements"
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        category = .viewCustomization
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        priority = 410
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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 pdfController = InsetUserInteracePDFViewController(document: document)
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        return pdfController
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    }
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}
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private class InsetUserInteracePDFViewController: PDFViewController {
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    override func viewWillLayoutSubviews() {
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        super.viewWillLayoutSubviews()
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        // Inset value of how much the scrubber bar should be moved up.
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        let bottomInset: CGFloat = 100
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        // Change the frame of the user interface view by moving it up
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        // the amount of bottomInset.
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        var userInterfaceFrame = self.view.bounds
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        userInterfaceFrame.size.height -= bottomInset
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        userInterfaceView.frame = userInterfaceFrame
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    }
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}