I am working with MacCatalyst and I would like to restore the previous content of windows after reopening the app. I found an example project (https://developer.apple.com/documentation/uikit/uiscenedelegate/restoring_your_app_s_state). I adopted the stateRestorationActivity(for scene: UIScene) method, however, according to the example project, when I want to configure a scene in the scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) method based on the session.stateRestorationActivity, the variable is always nil. Here's my code:
In SceneDelegate:
func stateRestorationActivity(for scene: UIScene) -> NSUserActivity? {
return scene.userActivity
}
func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
guard let windowScene = (scene as? UIWindowScene) else { return }
#if targetEnvironment(macCatalyst)
if let titlebar = windowScene.titlebar {
titlebar.titleVisibility = .hidden
titlebar.toolbarStyle = .unified
}
#endif
window = UIWindow(frame: windowScene.coordinateSpace.bounds)
window?.windowScene = windowScene
let contentViewController = ContentViewController()
window?.rootViewController = UINavigationController(rootViewController: contentViewController)
window?.makeKeyAndVisible()
if let userActivity = connectionOptions.userActivities.first ?? session.stateRestorationActivity {
if !configure(window: window, with: userActivity) {
print("Failed to restore from \(userActivity)")
}
} else {
if !configure(window: window, with: ContentType.Inbox.openDetailUserActivity) {
}
}
}
In AppDelegate:
func application(_ application: UIApplication, shouldSaveSecureApplicationState coder: NSCoder) -> Bool {
return true
}
func application(_ application: UIApplication, shouldRestoreSecureApplicationState coder: NSCoder) -> Bool {
return true
}
// MARK: - UISceneSession Lifecycle
func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration {
var configurationName: String!
switch options.userActivities.first?.activityType {
case .UserActivity.SystemActivityType, .UserActivity.TagActivityType, .UserActivity.ProjectActivityType:
configurationName = "Detail Configuration"
default:
configurationName = "Default Configuration"
}
return UISceneConfiguration(name: configurationName, sessionRole: connectingSceneSession.role)
}
I registred different configurations of UISceneSessions in the info plist.
