Customize Annotation Link Border Color 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 CustomLinkBorderColorExample: Example {
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    override init() {
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        super.init()
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        title = "Customize the Border Color for Links"
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        contentDescription = "Shows how to set a red border color for links."
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        category = .subclassing
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        priority = 170
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    }
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    override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController {
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        let document = AssetLoader.document(for: .welcome)
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        let controller = PDFViewController(document: document) {
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            $0.overrideClass(LinkAnnotationView.self, with: CustomBorderColorLinkAnnotationView.self)
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        }
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        // Go to a page with a link.
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        controller.pageIndex = 8
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        return controller
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    }
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}
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private class CustomBorderColorLinkAnnotationView: LinkAnnotationView {
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    override var strokeWidth: CGFloat {
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        get { return 1 }
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        set {}
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    }
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    override var borderColor: UIColor? {
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        get { return UIColor.red.withAlphaComponent(0.5) }
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        set {}
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    }
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}