Easiest way to get an NSDate representation of "the next 7am that will occur" in Cocoa?

Question

I figure I can achieve what I want by using NSCalendar and NSDateComponents, but that would run something like the following:

• Get "now"
• Create an NSDateComponents from "now".
• If "now" is pre-7am, then use today's date.
• If "now" is post-7am, use tomorrow's date.
  • If today is the last day of the month, increase month, set day to 1.
    • If it was December, increase year by 1 also.
• Set hour, minute, second.
• Create a new NSDate.

It all seems very long-winded, but that appears to be what other answers on here suggest, and the documentation doesn't offer any clues. I'm going back and forth between all the date and calendar classes I can find.

Is there a simple way to ask for the "next occurring 7am" ?

Thanks.

Answer 1

I haven't tried it, but I think this would work:

• Get Now date.
• Create NSDateComponents from Now.
• Set hour component to 7.
• Convert 7am date components back to an NSDate.
• If the 7am date is later than Now, you're done.
• Otherwise, use -[NSCalendar dateByAddingComponents:options:] to advance the 7am date by one day.

I'm not sure if that last step would do the right thing if a daylight savings change happened between one 7am and the next.