how to repeat local notification after 14 days in iOS 8 & 9 - ios

Question

The code to register for notifications is:
UIUserNotificationType types = UIUserNotificationTypeBadge | UIUserNotificationTypeSound | UIUserNotificationTypeAlert;
UIUserNotificationSettings *mySettings = [UIUserNotificationSettings settingsForTypes:types categories:nil];
[[UIApplication sharedApplication] registerUserNotificationSettings:mySettings];
And the code to schedule the notification:
UILocalNotification *notification = [[UILocalNotification alloc] init];
[self setNotificationTypesAllowed];
if (notification)
{
if (allowNotif)
{
notification.timeZone = [NSTimeZone defaultTimeZone];
if ( [statusString isEqualToString:#"daily"]) {
notification.fireDate = _timePick.date;
notification.repeatInterval = NSCalendarUnitDay;
}else if ( [statusString isEqualToString:#"weekly"]) {
notification.fireDate = _timePick.date;
notification.repeatInterval = NSCalendarUnitWeekOfYear;
}else if ( [statusString isEqualToString:#"fortnightly"]) {
notification.fireDate = [NSDate dateWithTimeIntervalSinceNow:60*60*24*14];;
notification.repeatInterval = NSCalendarUnitMinute;
//notification.repeatInterval = NSCalendarUnitYear;
}else{
notification.repeatInterval = 0;
}
}
if (allowsAlert)
{
notification.alertBody = [NSString stringWithFormat:#"Do you really want to send message to %#",name];
}
if (allowsBadge)
{
notification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] + 1;
}
if (allowsSound)
{
notification.soundName = UILocalNotificationDefaultSoundName;
}
notification.alertAction = #"Yes";
notification.timeZone = [NSTimeZone defaultTimeZone];
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(showSMS) name:#"showSMS" object:nil];
// this will schedule the notification to fire at the fire date
[[UIApplication sharedApplication] scheduleLocalNotification:notification];
I am able to repeat local notification daily & weekly but it is not repeating fortnightly ,please help

Answer 1

Yes as #Nikos suggested, try below code:
Cancel UILocalNotification.
[[UIApplication sharedApplication] cancelAllLocalNotifications];
Schedule local notification
UILocalNotification *notification = [[UILocalNotification alloc]init];
notification.userInfo = #{#"notification_identifier":#"After14Days"};
notification.fireDate = [[NSDate date] dateByAddingTimeInterval:(60*60*24*14)];
notification.alertBody = #"Text to display";
notification.repeatInterval = NSCalendarUnitDay;
[[UIApplication sharedApplication] scheduleLocalNotification:notification];
If you have any doubt then let me know.

Answer 2

To set a notification to fire every 14 days you have to create 26 separate UILocalNotifications with the repeatInterval set to NSYearCalendarUnit (the repeat interval must be set to a calendar unit, and there is no 14 days CalendarUnit in iOS).
Another way to handle it is to cancel the UILocalNotification in the didReceiveLocalNotification method and schedule a new one there for after 14 days. This method though assumes that the user interacts with the notification, otherwise the next one will never get scheduled.