Repeating a Local Notification after every 14 days(two weeks)?

Question

In my app i\'ve to set repetitive UILocalNotification. I\'m able to set repeatInterval as daily, weekly etc by doing

UILocalNotification *localN         


        

Answer 1

You can cancel the notification and set a new one fire date at 14 days from now when handling the notification. i.e. when your app is running in the foreground, do it in:

(void)application:(UIApplication *)application didReceiveLocalNotification:(UILocalNotification *)notification

See this SO topic: Set repeatInterval in local notification

I've tried this way, and it works.

Answer 2

In iOS 10, you can use UNTimeIntervalNotificationTrigger to repeat notification after every 14 days.

UNTimeIntervalNotificationTrigger* trigger = [UNTimeIntervalNotificationTrigger triggerWithTimeInterval:(14*24*3600) repeats: YES];
NSLog(@"td %@", trigger.nextTriggerDate);

UNNotificationRequest *request = [UNNotificationRequest requestWithIdentifier:identifier content:content trigger:trigger];

[center addNotificationRequest:request withCompletionHandler:^(NSError * _Nullable error) {
    if (error != nil) {
        NSLog(@"Something went wrong: %@",error);
    } else {
        NSLog(@"Created! --> %@",request);
    }
}];

Hope this will help anyone looking for this topic.

Answer 3

You can only set the repeat interval to a calendar unit. In order to get the right time interval you may have to set several notifications though.

If you for instance wanted a notification every 20 minutes you would have to create 3 notifications 20 minutes apart with a repeat interval of NSHourCalendarUnit.

The problem in your case is that the next thing up from the week unit is a month but a month is not exactly 4 weeks.

To actually set a notification for every 14 days you will have to create 26 notifications with a repeat interval of NSYearCalendarUnit.