Is it possible to trigger a local notification after an event IOS?

Question

Im working on an app that does some computationally heavy tasks that take a long time. I want to notify the user with a local push notification when the task is done. Is this possible? The only information I have been able to find online is to do with triggering notifications at certain times/dates or if the app has entered the background or terminated, all of which is done in the appDelegate. Is there a way to do this in my own classes?

Thanks.

Answer 1

I'm not 100% certain you're looking for a UILocalNotification example because the post title mentions push notifications. Either way, you can schedule local notifications from any class you want

- (void)throwLocalNotificationWithMessage:(NSString*)message {    
    UILocalNotification *localNotification = [[UILocalNotification alloc] init];
    NSDate *now = [NSDate date];
    localNotification.fireDate = now;
    localNotification.alertBody = message;
    localNotification.soundName = UILocalNotificationDefaultSoundName;
    [[UIApplication sharedApplication] scheduleLocalNotification:localNotification];
    [UIApplication sharedApplication].applicationIconBadgeNumber++;
}

Also, for my needs I throw these local notifications when region monitoring detects boundary enter/exit changes. This code runs while my app is in the background, as well, and in that case they appear like push notifications.