swiftui-multiplatform/ActionExtension-iOS/ActionViewController.swift

import UIKit
import MobileCoreServices
import UniformTypeIdentifiers

class ActionViewController: UIViewController {

    @IBOutlet weak var imageView: UIImageView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Get the item[s] we're handling from the extension context.
        if let inputItem = extensionContext?.inputItems.first as? NSExtensionItem {
            if let itemProvider = inputItem.attachments?.first {
                itemProvider.loadItem(forTypeIdentifier: kUTTypePropertyList as String) { [weak self] dict, error in
                    guard let itemDictionary = dict as? NSDictionary else { return }
                    guard let javaScriptValues = itemDictionary[NSExtensionJavaScriptPreprocessingResultsKey] as? NSDictionary else { return }
                    print(javaScriptValues)
                }
            }
        }
    }

    @IBAction func done() {
        // Return any edited content to the host app.
        // This template doesn't do anything, so we just echo the passed in items.
        self.extensionContext!.completeRequest(returningItems: self.extensionContext!.inputItems, completionHandler: nil)
    }

}