Create PDF Programmatically in Swift for iOS

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//
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//  Copyright © 2016-2025 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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/// Shows how to create a new document with `PSPDFProcessor`.
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final class NewDocumentCreationExample: Example {
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    // MARK: Lifecycle
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    override init() {
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        super.init()
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        title = "Create new document"
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        contentDescription = "Uses PSPDFProcessor to create a new document"
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        category = .documentProcessing
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        priority = 11
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    }
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    override func invoke(with delegate: ExampleRunnerDelegate) -> UIViewController {
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        // Set up configuration to create a new document.
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        let configuration = Processor.Configuration()
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        // Add an empty page with image in the bottom center.
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        let backgroundColor = UIColor(red: 0.965, green: 0.953, blue: 0.906, alpha: 1)
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        let image = UIImage(named: "exampleimage.jpg")!
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        let emptyPageTemplate = PageTemplate.blank
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        let newPageConfiguration = PDFNewPageConfiguration(pageTemplate: emptyPageTemplate) {
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            $0.backgroundColor = backgroundColor
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            $0.pageMargins = UIEdgeInsets(top: 50, left: 50, bottom: 50, right: 50)
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            $0.item = ProcessorItem(image: image, jpegCompressionQuality: 0.8) { itemBuilder in
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                itemBuilder.alignment = .bottom
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                itemBuilder.transform = CGAffineTransform(scaleX: 0.3, y: 0.3)
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            }
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        }
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        configuration.addNewPage(at: 0, configuration: newPageConfiguration)
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        // Add a page with a pattern grid.
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        configuration.addNewPage(at: 1, configuration: PDFNewPageConfiguration(pageTemplate: PageTemplate(pageType: .tiledPatternPage, identifier: .grid5mm)) {
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            $0.backgroundColor = backgroundColor
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        })
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        // Add a page from a different document.
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        let document = AssetLoader.document(for: .welcome)
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        let documentTemplate = PageTemplate(document: document, sourcePageIndex: 7)
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        configuration.addNewPage(at: 2, configuration: PDFNewPageConfiguration(pageTemplate: documentTemplate))
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        let outputFileURL = FileHelper.temporaryPDFFileURL(prefix: "new-document")
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        do {
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            // Invoke processor to create new document.
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            let processor = Processor(configuration: configuration, securityOptions: nil)
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            processor.delegate = self
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            try processor.write(toFileURL: outputFileURL)
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        } catch {
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            print("Error while processing document: \(error)")
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        }
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        // Init new document and view controller.
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        let newDocument = Document(url: outputFileURL)
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        let pdfController = PDFViewController(document: newDocument)
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        return pdfController
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    }
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}
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extension NewDocumentCreationExample: ProcessorDelegate {
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    nonisolated func processor(_ processor: Processor, didProcessPage currentPage: UInt, totalPages: UInt) {
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        print("Progress: \(currentPage + 1) of \(totalPages)")
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    }
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}