Registering for push notifications post launch not working?

Question

Created Feb ’18

Replies 0

Boosts 0

Participants 1

I have an app delegate that has the following method:-

-(BOOL) registerForNotifications:(UIApplication *)application {
    // [START register_for_notifications]
    // Register for remote notifications. This shows a permission dialog on first run, to
    // show the dialog at a more appropriate time move this registration accordingly.
    if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_7_1) {
        // iOS 7.1 or earlier. Disable the deprecation warnings
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
        UIRemoteNotificationType allNotificationTypes =
        (UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert | UIRemoteNotificationTypeBadge);
        [application registerForRemoteNotificationTypes:allNotificationTypes];
#pragma clang diagnostic pop
    } else {
        // iOS 8 or later
        if (floor(NSFoundationVersionNumber) <= NSFoundationVersionNumber_iOS_9_x_Max) {
            UIUserNotificationType allNotificationTypes =
            (UIUserNotificationTypeSound | UIUserNotificationTypeAlert | UIUserNotificationTypeBadge);
            UIUserNotificationSettings *settings = [UIUserNotificationSettings settingsForTypes:allNotificationTypes categories:nil];
            [application registerUserNotificationSettings:settings];
        } else {
            // iOS 10 or later
#if defined(__IPHONE_10_0) && __IPHONE_OS_VERSION_MAX_ALLOWED >= __IPHONE_10_0
            // For iOS 10 display notification (sent via APNS)
            [UNUserNotificationCenter currentNotificationCenter].delegate = self;
            UNAuthorizationOptions authOptions = UNAuthorizationOptionAlert | UNAuthorizationOptionSound | UNAuthorizationOptionBadge;
            [[UNUserNotificationCenter currentNotificationCenter]
             requestAuthorizationWithOptions:authOptions
             completionHandler:^(BOOL granted, NSError * _Nullable error) {
                 NSLog(@"notification permission is %@", granted ? @"granted" : @"denied");
             }
             ];
#endif
        }

        [application registerForRemoteNotifications];
        // [END register_for_notifications]
    }
    return YES;
}

If I call this method from

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
  [self registerForNotifiations:application];
}

it works.

However, if I call it later (from another thread) as follows, it doesn't work:

UIApplication *application = [UIApplication sharedApplication];
[(AppDelegate *)[application delegate] registerForNotifications:application];

If I delete, and install app with the first method, so notifications work, I can switch to the second code and update the app, and notifications will still work, but I can't do the reverse, that is, install app with second method, notifications don't work, update app to use first method, notifications still don't work, until I delete the app and re-install.

Do I need to call this on the main thread perhaps? If so how do I do that?

*edit*

Ok, tried the following version of the second method and it made no difference.

    dispatch_async(dispatch_get_main_queue(), ^{
        UIApplication *application = [UIApplication sharedApplication];
        [(AppDelegate *)[application delegate] registerForNotifications:application];
    });

Is [UIApplication sharedApplication] the same as application passed to didFinishLaunchingWIthOptions?

I am at a loss as to why this is not working.

Boost