Display and open saved files on TableView - ios

Question

I made an pdf creator app. After creating pdf file I want to display the created files on a tableview. I created Tableview Controller and DocumentDirectoryTableTableViewController. I don't know how to do it after all of that.
I found this and this questions but I couldn't implement it into my code.
Also better to add my code for saving file:
// 5. Save PDF file
let path = "/MyApp/PdfFiles/MyPDF.pdf"
pdfData.write(toFile: path, atomically: true)
print("open \(path)") // command to open the generated file
UPDATE:
I can also get the App Directory and use it by this function:
func getDocumentsDirectory() -> URL {
let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
let documentsDirectory = paths[0]
return documentsDirectory
}
and
let path = "\(getDocumentsDirectory())MyApp.pdf"

Answer 1

If you have NSData for the pdf file you're trying to store and if you want user to access it, you can write it using this:
func writePDF(data: NSData, to Name:String) -> Bool {
let pdfData:NSData = data
let pdfPaths:[String] = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
var pdfPath = pdfPaths[0]
pdfPath.append("_\(Name).pdf")
let result:Bool = pdfData.write(toFile: pdfPath, atomically: true)
return result
}
If you want to read pdf file programatically in your app given that you store it in the above path. It can be done using this:
func readPDF(Name: String) {
let pdfPaths:[String] = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
var pdfPath = pdfPaths[0]
pdfPath.append("_\(Name).pdf")
if let pdfData:NSData = NSData(contentsOfFile: pdfPath) { // verifying pdf exists in this path
let documentController: UIDocumentInteractionController = UIDocumentInteractionController(url: URL(fileURLWithPath: pdfPath))
documentController.delegate = self
documentController.presentPreview(animated: true)
}
}
// the below delegate function for `UIDocumentInteractionController` is necessary for it to present in the current `UIViewController`
func documentInteractionControllerViewControllerForPreview(_ controller: UIDocumentInteractionController) -> UIViewController {
return self
}