UNUserNotificationCenter removeAllDeliveredNotifications not working in ios 11.2

Question

I have an app with multiple local notifications. When I try to clear all the delivered notifications, I call this removeAllDeliveredNotifications method. It\'s

Answer 1

It is still working for us. I just checked it on iOS 11.2.2. I am using removeDeliveredNotificationsWithIdentifiers: inside getDeliveredNotificationsWithCompletionHandler:, calling getDeliveredNotificationsWithCompletionHandler on Main Thread.

- (void)removePendingNotificationsForObjectID:(SJFObjectID *)objectID {
    __weak __typeof(self) weakSelf = self;
    [self.userNotificationCenter getDeliveredNotificationsWithCompletionHandler:^(NSArray<UNNotification *> *notifications) {
        __strong __typeof(weakSelf) self = weakSelf;
        NSMutableArray <NSString *> *identifiersToRemove = [@[] mutableCopy];
        for (UNNotification *notification in notifications) {
            SJFObjectID *objectIDFromNotification = [self.notificationToObjectIDMarshaller marshalNotification:notification];
            if ([objectID isEqual:objectIDFromNotification]) {
                [identifiersToRemove addObject:notification.request.identifier];
            }
        }
        [self.userNotificationCenter removeDeliveredNotificationsWithIdentifiers:identifiersToRemove];
    }];
}

Though I experience strange behavior if I am debugging the completionHandler. If a pause too long (whatever that means) the completion handler will not finish (even on continue process execution) resulting in an unresponsive app. Maybe the completionhandler gets terminated.

Answer 2

Did you try using this method:

removeDeliveredNotifications(withIdentifiers:)

You will need to pass an array of all the notification identifiers that you need to delete.

Answer 3

This appears to be a bug in iOS that was fixed in iOS 11.3.