UIApplicationLaunchOptionsRemoteNotificationKey not getting userinfo

Question

In my current project I have a push notification. When I tap the app icon I want to get the received notification from the launch options object, but it always returns nil:

NSDictionary *userInfo = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];

Answer 1

You can't detect that case, because application is not open using push notification (it has been open via app icon).
Try to open application by swiping push notification.

EDIT:

If you want to be invoked for push notification (via background fetch, when your application is not active) you need to ask your backend developer to set "content-available": 1 in push notification.

After that -application:didReceiveRemoteNotification:fetchCompletionHandler: will be invoked (when push-notification arrives), so you can save the payload into a file and then when application will be open, you can read the file and take actions.

- (void)application:(UIApplication *)application
didReceiveRemoteNotification:(NSDictionary *)userInfo
fetchCompletionHandler:(void (^)(UIBackgroundFetchResult))completionHandler
{
    NSLog(@"#BACKGROUND FETCH CALLED: %@", userInfo);
    // When we get a push, just writing it to file
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"userInfo.plist"];

    [userInfo writeToFile:filePath atomically:YES];
    completionHandler(UIBackgroundFetchResultNewData);
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Checking if application was launched by tapping icon, or push notification
    if (!launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey]) {
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"userInfo.plist"];

        [[NSFileManager defaultManager] removeItemAtPath:filePath
                                                   error:nil];
        NSDictionary *info = [NSDictionary dictionaryWithContentsOfFile:filePath];
        if (info) {
            // Launched by tapping icon
            // ... your handling here
        }
    } else {
        NSDictionary *info = launchOptions[UIApplicationLaunchOptionsRemoteNotificationKey];
        // Launched with swiping
        // ... your handling here
    }
    return YES;
}

Also don't forget to enable "Remote notifications" in "Background Modes"

Answer 2

When you launch the application from a PUSH NOTIFICATION ACTION, [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey] will return you the push notification payload (in dictionary format). When I say push notification action, it means either tapping the push notification from action center or from the push notification alert dialog (Depending on the device settings, push notification delivery mechanism varies).

If you launch the application by tapping the APP ICON, [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey] always returns nil. Because, it hasn't been launched from any kind of push notification.