You can add this PDF reader to any your project. Create a new PDFViewController, pass it a document name and display it like any other view controller.
guard let name = Bundle.main.url(forResource: name as? String, withExtension: "pdf") else { return }
let pdfDocumentController = PDFViewController()
pdfDocumentsController.name = name
navigationController?.pushViewController(pdfDocumentController, animated: true)
Inspired by Alua Kinzhebayeva's iOS-PDF-Reader.
Icons from App Icon Template.