Search Multiple PDF Files using 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 FullTextSearchExample: Example, PDFDocumentPickerControllerDelegate {
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    override init() {
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        super.init()
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        title = "Full-Text Search"
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        contentDescription = "Use PDFDocumentPickerController to perform a full-text search across all sample documents."
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        category = .textExtraction
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        priority = 10
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    }
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    override func invoke(with delegate: ExampleRunnerDelegate?) -> UIViewController? {
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        // Load the `PDFDocumentPickerController` with a directory of documents to index and an instance of a `PDFLibrary` to use.
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        // Also, see https://www.nutrient.io/guides/ios/features/indexed-full-text-search/
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        let documentPicker = PDFDocumentPickerController(directory: "/Bundle/Samples", includeSubdirectories: true, library: SDK.shared.library)
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        documentPicker.delegate = self
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        documentPicker.fullTextSearchEnabled = true
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        return documentPicker
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    }
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    // MARK: - PDFDocumentPickerControllerDelegate
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    func documentPickerController(_ controller: PDFDocumentPickerController, didSelect document: Document, pageIndex: PageIndex, search searchString: String?) {
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        let pdfController = PDFViewController(document: document)
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        pdfController.pageIndex = pageIndex
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        pdfController.navigationItem.setRightBarButtonItems([pdfController.thumbnailsButtonItem, pdfController.annotationButtonItem, pdfController.outlineButtonItem, pdfController.searchButtonItem], for: .document, animated: false)
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        controller.navigationController?.pushViewController(pdfController, animated: true)
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    }
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}