View pdf documents - swift

Question

I have a table with the names of pdf documents. Previously, there were 3 documents and each one has its own ViewController. How can I make it so that with hundreds of documents, I would select one from the table and show it on the View, if I select another document, then on the same View show another document.
while I have such a function, where I substituted the name of the documents in each class and showed it in different representations. But now I need to display everything on one ViewController when selecting any document
import UIKit
import PDFKit
class pdfViewClass {
class func filePDfFunc(nameFile: String, formatFile:String,
nameView:PDFView)
{
if let path = Bundle.main.path(forResource: nameFile,
ofType:formatFile) {
if let pdfDocument = PDFDocument(url: URL(fileURLWithPath:
path)) {
nameView.autoScales = true
nameView.displayDirection = .vertical
nameView.document = pdfDocument
}
}
}
}

Answer 1

You can use Native Apple UIDocumentInteractionController for viewing PDF file.
Create a function like below for View PDF
func viewPdf(urlPath: String, screenTitle: String) {
// open pdf for booking id
guard let url = urlPath.toUrl else {
print("Please pass valid url")
return
}
self.downloadPdf(fileURL: url, screenTitle: screenTitle) { localPdf in
if let url = localPdf {
DispatchQueue.main.sync {
self.openDocument(atURL: url, screenTitle: screenTitle)
}
}
}
}
Function for download PDF
// method for download pdf file
func downloadPdf(fileURL: URL, screenTitle: String, complition: #escaping ((URL?) -> Void)) {
// Create destination URL
if let documentsUrl: URL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first {
let destinationFileUrl = documentsUrl.appendingPathComponent("\(screenTitle).pdf")
if FileManager.default.fileExists(atPath: destinationFileUrl.path) {
try? FileManager.default.removeItem(at: destinationFileUrl)
}
let sessionConfig = URLSessionConfiguration.default
let session = URLSession(configuration: sessionConfig)
let request = URLRequest(url: fileURL)
let task = session.downloadTask(with: request) { tempLocalUrl, response, error in
if let tempLocalUrl = tempLocalUrl, error == nil {
// Success
if let statusCode = (response as? HTTPURLResponse)?.statusCode {
print("Successfully downloaded. Status code: \(statusCode)")
}
do {
try FileManager.default.copyItem(at: tempLocalUrl, to: destinationFileUrl)
complition(destinationFileUrl)
} catch let writeError {
print("Error creating a file \(destinationFileUrl) : \(writeError)")
}
} else {
print("Error took place while downloading a file. Error description: \(error?.localizedDescription ?? "N/A")")
}
}
task.resume()
} else {
complition(nil)
}
}
Function for open documents
func openDocument(atURL url: URL, screenTitle: String) {
self.documentInteractionController.url = url
self.documentInteractionController.name = screenTitle
self.documentInteractionController.delegate = self
self.documentInteractionController.presentPreview(animated: true)
}
On tap of tableView pass the specific index URL
viewPdf(urlPath: "http://www.africau.edu/images/default/sample.pdf", screenTitle: "Tesing Document")

Answer 2

You can do it using WKWebView easily. Use WKWebView to load your pdf doc.