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Adding icon and file description on share sheet ActivityViewController

Forums > SwiftUI

I'm exporting CSV sheets from my CoreData entities, creating comma separated Strings, and appending them to exporting functions like this:

func dataExport(data: Student) -> [Any] {

    let exportFilePath = NSTemporaryDirectory() + "student tutorships.csv"
    let exportFileURL = URL(fileURLWithPath: exportFilePath)
    FileManager.default.createFile(atPath: exportFilePath, contents: Data(), attributes: nil)
    let fileHandle: FileHandle?

    do {
        fileHandle = try FileHandle(forWritingTo: exportFileURL)
    } catch let error as NSError {
        print("Error writing exporting file: \(error)")
        fileHandle = nil
    }

    if let fileHandle = fileHandle {

        let headers = "Date, Attendees, Topics, Conclussions\r\n"
        let headersData = headers.data(using: .utf8, allowLossyConversion: false)!
        fileHandle.write(headersData)

        fileHandle.seekToEndOfFile()
        //csvStudentTutorship is the creating-CSV function.
        guard let csvData = data.csvStudentTutorships().data(using: .utf8, allowLossyConversion: false) else { return [] }
        fileHandle.write(csvData)
        fileHandle.closeFile()
        let document = NSURL(fileURLWithPath: exportFilePath)
        let fileToShare = [document]
        return fileToShare
    }
    return []
}

This way, I get and array of type NSURL as output to be shared:

let fileToShare: [NSURL]

For sharing sheet to be presented in SwiftUI, I use an ActivityViewController with UIViewControllerRepresentable protocol:

import UIKit
import SwiftUI

struct ActivityViewController: UIViewControllerRepresentable {

    var activityItems: [Any]
    var applicationActivities: [UIActivity]? = nil

    func makeUIViewController(context: UIViewControllerRepresentableContext<ActivityViewController>) -> UIActivityViewController {

        let controller = UIActivityViewController(activityItems: activityItems, applicationActivities: applicationActivities)
        return controller
    }

    func updateUIViewController(_ uiViewController: UIActivityViewController, context: Context) {
    }
}

And I call an instance from my view with

.sheet(isPresented: $showingSharing) {
            ActivityViewController(activityItems: studentTutorshipsExport(data: student), applicationActivities: nil)
        }

All that is working correctly (many console messages, but working).

Now, I'm trying to get my app logo and the description of the sharing file with activityViewControllerLinkMetadata as described here: https://stackoverflow.com/questions/63886792/how-to-attach-an-image-icon-to-the-uiactivityviewcontroller and here https://developer.apple.com/documentation/uikit/uiactivityitemsource/3144571-activityviewcontrollerlinkmetada?language=swift.

But I can't make it work. If I pass the icon image from my origin view as "activityItems" parameter , only image appears, but I loose sharing document itself. I'm not sure if this is correct in SwiftUI. Any further ideas?

   

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