3D Touch Quick actions not working at all

import UIKit @UIApplicationMain class AppDelegate: UIResponder, UIApplicationDelegate { var shortcutItemToProcess: UIApplicationShortcutItem? func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { // Override point for customization after application launch. if let shortcutItem = launchOptions?[UIApplication.LaunchOptionsKey.shortcutItem] as? UIApplicationShortcutItem { shortcutItemToProcess = shortcutItem print("Shortcut pressed") } return true } func application(_ application: UIApplication, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: (Bool) -> Void) { print("Shortcut pressed") } func applicationDidBecomeActive(_ application: UIApplication) { print("Shortcut pressed") } // MARK: UISceneSession Lifecycle func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration { // Called when a new scene session is being created. // Use this method to select a configuration to create the new scene with. return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role) } func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set<UISceneSession>) { // Called when the user discards a scene session. // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions. // Use this method to release any resources that were specific to the discarded scenes, as they will not return. } }

Looks like your app is Scene based. For Scene based apps you can almost forget about the AppDelegate and focus on the SceneDelegate. There are two methods you now need to override in the SceneDelegate and one in the AppDelegate. I'll mimic Apple's guide for clarity:

If the user is opening the app and it's a fresh launch, you handle this in the AppDelegate:

     // AppDelegate.swift
     func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
         // Called when a new scene session is being created.
         // Use this method to select a configuration to create the new scene with.

         // Grab a reference to the shortcutItem to use in the scene
         if let shortcutItem = options.shortcutItem {
             shortcutItemToProcess = shortcutItem
         }

         // Previously this method only contained the line below, where the scene is configured
         return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role)
     }

If your app is still running in the background when the user clicks on the shortcut item, you handle that in the SceneDelegate:

    // SceneDelegate.swift
    func windowScene(_ windowScene: UIWindowScene, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: @escaping (Bool) -> Void) {
        // When the user opens the app through a quick action, this is now the method that will be called
        (UIApplication.shared.delegate as! AppDelegate).shortcutItemToProcess = shortcutItem
    }

Once the scene is ready, you can do what you need to with the shortcut :

    // SceneDelegate.swift
    func sceneDidBecomeActive(_ scene: UIScene) {
        // Is there a shortcut item that has not yet been processed?
        if let shortcutItem = (UIApplication.shared.delegate as! AppDelegate).shortcutItemToProcess {
            // In this sample an alert is being shown to indicate that the action has been triggered,
            // but in real code the functionality for the quick action would be triggered.
            var message = "\(shortcutItem.type) triggered"
            if let name = shortcutItem.userInfo?["Name"] {
                message += " for \(name)"
            }
            let alertController = UIAlertController(title: "Quick Action", message: message, preferredStyle: .alert)
            alertController.addAction(UIAlertAction(title: "Close", style: .default, handler: nil))
            window?.rootViewController?.present(alertController, animated: true, completion: nil)

            // Reset the shorcut item so it's never processed twice.
            (UIApplication.shared.delegate as! AppDelegate).shortcutItemToProcess = nil
        }
    }

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