Detecting Source Application for Launch Depracated? Aternatives? - swift

Question

I am trying to detect if another application has launched my app in order to launch a different view to accept a pdf being passed to it. It appears that LaunchOptionsKey can be used in the AppDelegate, but the following code dosn't seem to work. Can anyone tell me if I'm using the code wrong or if there are alternatives. Most references use the sourceApplication to do this, but I read claims that is was depracated in 2019, yet apple still has it in their documentation? Also I notice that switching launch views only works in the SceneDelegate instead of the AppDelegate. Apparently this is also a recent change?
class AppDelegate: UIResponder, UIApplicationDelegate {
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
print("finished launching")
if launchOptions?[UIApplication.LaunchOptionsKey.sourceApplication] != nil {
print("Launched by another app")
startVC = "addFile"
} else {
print("source app not identified")
}
return true
}
class SceneDelegate: UIResponder, UIWindowSceneDelegate {
var window: UIWindow?
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
print("Scene: finished launching")
//self.window = UIWindow(frame: UIScreen.main.bounds) // black sreen
let storyBoard = UIStoryboard.init(name: "Main", bundle: nil)
if startVC == "addFile" {
let initialVc = storyBoard.instantiateViewController(withIdentifier: "addFile") as! addFileViewController
self.window?.rootViewController = initialVc
self.window?.makeKeyAndVisible()
}
if startVC == "home" {
let initialVc = storyBoard.instantiateViewController(withIdentifier: "home") as! FirstController
self.window?.rootViewController = initialVc
self.window?.makeKeyAndVisible()
}
guard let _ = (scene as? UIWindowScene) else { return }
}