Since iOS 10 and with the UserNotifications framework, detecting wether the user launched the app organically or from a local/remote notification is a bit different than before.
Let’s say I’ve to send an event to my analytics service when user launches the app, I do this using one of these three calls:
- Analytics.trackAppLaunched(source: .organic)
- Analytics.trackAppLaunched(source: .localNotification)
- Analytics.trackAppLaunched(source: .remoteNotification)
I have a NotificationController class that will be the UNUserNotificationCenter delegate. After experimenting a bit with it, I noticed that userNotificationCenter(:didReceive:withCompletionHandler:) is called after application(:didLaunchWithOptions:) but before applicationDidBecomeActive(_:).
In order to not send the event multiple times, we simply need to set a flag when we handle a notification during launch, I called it handledLaunchAnalytics.
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| func applicationDidBecomeActive(_ application: UIApplication) { | |
| let notificationController = NotificationController.shared | |
| // Track app launch if the notificationController didn't already do it | |
| if !notificationController.handledLaunchAnalytics { | |
| Analytics.trackAppLaunched(source: .Organic) | |
| } | |
| } |
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| private(set) var handledLaunchAnalytics: Bool = false | |
| func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler: @escaping () -> Void) { | |
| let atAppLaunch: Bool = (UIApplication.shared.applicationState != .active) | |
| let request: UNNotificationRequest = response.notification.request | |
| if let trigger = request.trigger, trigger is UNPushNotificationTrigger { | |
| // if atAppLaunch == true, call Analytics.trackAppLaunched(source: .remoteNotification) | |
| // and flag handledLaunchAnalytics as true | |
| // then you can handle your remote notification here | |
| } else { | |
| // if atAppLaunch == true, call Analytics.trackAppLaunched(source: .localNotification) | |
| // and flag handledLaunchAnalytics as true | |
| // then you can handle your local notification here | |
| } | |
| completionHandler() | |
| } |
Let’s just not forget to reset handledLaunchAnalytics when the app is going back to background.
If you know of a better way for doing this, I would be happy to hear about you!