Re: NSDate without time portion
Re: NSDate without time portion
- Subject: Re: NSDate without time portion
- From: David Duncan <email@hidden>
- Date: Tue, 5 Jan 2010 12:25:16 -0800
On Jan 5, 2010, at 12:15 PM, Chris Ridd wrote:
> On 5 Jan 2010, at 19:41, Nick Zitzmann wrote:
>
>>
>> On Jan 5, 2010, at 12:23 PM, Chris Ridd wrote:
>>
>>> However Core Data models "dates" using NSDate. If you needed to model dates without times in Core Data (and be able to sort/filter on them) what would you do?
>>
>> Normalize the time component of the date.
>
> Nod, except that this normalization is exactly what was being recommended *against* by Quincey :-)
But as Glenn just mentioned, NSDate knows nothing about time zones, daylight's savings time, etc. It is just an offset from Midnight 1/1/01 GMT. Everything else is a display issue, and as the Core Data documentation warns you must store the timezone information separately (which can also mean that you assume a standard time zone for all dates you store).
--
David Duncan
Apple DTS Animation and Printing
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden