Do something with Quick Action

Question

Sorry if this is a dumb question, Setting up a 3D Touch quick action. I put everything into the.plist file and I had to put this into my AppDelegate.swift file

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) }

and this into my SceneDelegate.swift

// Shortcut code
    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

    }
    // Shortcut code
    func sceneDidBecomeActive(_ scene: UIScene) {
        // Is there a shortcut item that has not yet been processed?
        if let shortcutItem = (UIApplication.shared.delegate as! AppDelegate).shortcutItemToProcess {


            if shortcutItem.type == "com.application.Start" {
                print("Start Shortcut pressed")

                //let vc = ViewController ()
                //vc.startAct()

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

I want to run the function startAct() {... } that's in the Main app file called ViewController.swift

I tried

let vc = ViewController ()
vc.startAct()

and it sort of starts to run but crashed straight away on the first line with an error about unwrapping a nil value or something. Im guessing its not actually loading the Main view but trying to run it from the SceneDelegate.swift which cannot be correct.

Thank you in advance.

Answer 1

This seems to be causing some confusion so I'll show what I do.

You have to implement your response to the shortcut item in two places: in the scene delegate's willConnectTo and in performActionFor . To help you test, I'll just delete all my error checking and parsing and just demonstrate that we are in fact responding to the shortcut item:

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
    if let shortcutItem = connectionOptions.shortcutItem {
        let alert = UIAlertController(title: "Hello", message: "", preferredStyle: .alert)
        alert.addAction(UIAlertAction(title: "OK", style: .default))
        self.window?.makeKeyAndVisible()
        self.window?.rootViewController?.present(alert, animated: true)
    }
}

func windowScene(_ windowScene: UIWindowScene, performActionFor shortcutItem: UIApplicationShortcutItem, completionHandler: @escaping (Bool) -> Void) {
    let alert = UIAlertController(title: "Hello", message: "", preferredStyle: .alert)
    alert.addAction(UIAlertAction(title: "OK", style: .default))
    self.window?.rootViewController?.present(alert, animated: true)
    completionHandler(true)
}

That shows the alert whether the app is suspended or terminated beforehand.