local notification repeatinterval with a specific minute of the hour

Question

I'm trying here to repeat a local notification for every hour. so I tried this sample code:

UILocalNotification *reminderNote = [[UILocalNotification alloc]init];
    reminderNote.fireDate = [NSDate dateWithTimeIntervalSinceNow:60 * 60];
    reminderNote.repeatInterval = NSDayCalendarUnit;
    reminderNote.alertBody = @"some text";
    reminderNote.alertAction = @"View";
    reminderNote.soundName = @"sound.aif";
    [[UIApplication sharedApplication] scheduleLocalNotification:reminderNote];

and it worked fine. But when I try to repeat it at a specific minute of the hour, say every hour sharp, or every hour and 6 mins. I just couldn't figure out a way to do that! I tried to change SinceNow to anything else but it's not working!

Is there a way change it? or any other sample code that I should work on?

Thanks in Advance.

Answer 1

If the repeat interval between the first and the second reminder repetition is different from the interval for the rest, you need to define a new local notification with the correct fire date, e.g. 6 minutes after the hour. Then set the repeat interval to the NSHourCalendarUnit.

You can specify the interval with the usual pattern with NSCalendar and NSDateComponents. This is well documented here.

Answer 2

reminderNote.repeatInterval = NSHourCalendarUnit;