Fire UILocalNotification in a specific Date

Question

I want to fire a UILocalNotification in a specific Date. If I use this code:

NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [gregorian components:NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit fromDate:[NSDate date]];

[components setHour:4];
[components setMinute:0];

NSDate *fireDate = [gregorian dateFromComponents:components];

If now it's 3 pm this works fine, but it doesn't when, for example, it's 5 pm.

How can I set the notification fire date to "the next 4 pm" ?

Answer 1

NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents *components = [gregorian components:NSYearCalendarUnit | NSMonthCalendarUnit |  NSDayCalendarUnit fromDate:[NSDate date]];

[components setHour:4];
[components setMinute:0];

NSDate *fireDate = [gregorian dateFromComponents:components];
 NSLog(@"Fire date : %@",fireDate);// Today 4pm is already passed. So you wont get notification 

// You need to check if the time is already passed
if ([fireDate compare:[NSDate date]] == NSOrderedAscending)
{
    // Schedule it for next day 4pm
    components.day = components.day+1;
    fireDate = [gregorian dateFromComponents:components];
}
NSLog(@"Fire date : %@",fireDate);