How to name and share multiple CSV files on Swift5

Question

I’m working on iOS app using swift5.
There, some csv files are created on the app.
What I want to do is to name each csv file respectively, and share it to file app or SNS app using UIDocumentInteractionController. I coded like below, and no error occurred, but a folder named “document” was created and csv files which I didn’t expected were in it. I had no idea what was going on.
If you have any ideas about this problem, please share.

// Get fileURL of Document directory.
let documentDirectoryFileURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).last!

//csvStringArray contains String items which CSV files are made of.
for i in 0..<csvStringArray.count{
     let fileName = String(i) + ".csv"
     let csvData = csvStringArray[i]
     
     let FilePath = documentDirectoryFileURL.appendingPathComponent(fileName)
     do {
          try csvData.write(to: FilePath, atomically: true, encoding: String.Encoding.utf8)
     } catch let error as NSError {
          print("failed to write: (error)")
     }
}

documentInteraction = UIDocumentInteractionController()
documentInteraction.url = documentDirectoryFileURL

Answer 1

I made it via uiactivityviewcontroller. Thanks.