Customize scrubber bar with buttons using Swift for iOS

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//
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//  Copyright © 2021-2026 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 ScrubberBarWithButtonsExample: Example {
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    override init() {
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        super.init()
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            title = "Scrubber Bar with buttons"
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            contentDescription = "Adds UIBarButtonItems to the scrubber bar"
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            category = .viewCustomization
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            priority = 401
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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 = PDFViewController(document: document)
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        // Add buttons to the scrubber toolbar
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        let leftBarButtonItem = UIBarButtonItem(barButtonSystemItem: .reply, target: self, action: #selector(leftButtonPressed(_:)))
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        let rightBarButtonItem = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(rightButtonPressed(_:)))
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        let spacingItem = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
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        pdfController.userInterfaceView.scrubberBar.toolbar.items = [leftBarButtonItem, spacingItem, rightBarButtonItem]
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        // Set the margin
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        let margin: CGFloat = 50.0
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        pdfController.userInterfaceView.scrubberBar.leftBorderMargin = margin
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        pdfController.userInterfaceView.scrubberBar.rightBorderMargin = margin
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        return pdfController
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    }
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    @objc func leftButtonPressed(_ sender: Any?) {
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        print("Left button pressed.")
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    }
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    @objc func rightButtonPressed(_ sender: Any?) {
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        print("Right button pressed.")
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    }
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}