On Sep 15, 2008, at 05:35 , Jean-Daniel Dupas wrote:
Le 15 sept. 08 à 09:56, Jason Coco a écrit :On Sep 15, 2008, at 03:49 , Markus Spoettl wrote:Hi List,I just know it must be there but I can't see it. How can I get to the NSTimeZone for a given NSDate. When using -description: the date got a time zone, so it's stored in there but how on earth can I get to it? I only need the GMT offset (numerically, not as string), in case there's a simpler way to obtain this.All NSDate objects are stored as seconds since the reference date (Jan 1 1970 00:00 GMT) and so are always GMT. The description is using the default time zone to adjust the date. You can get the default time zone with [NSTimeZone defaultTimeZone] and then you can get the offset with -(NSTimeInterval)secondsFromGMT.It's conceptualy right, but just for info, NSDate do not store the value as a UNIX timestamp, but as a Core Foundation Absolute Time which is a double that represents the number of seconds since the reference date which is 00:00:00 1 January 2001
Oh yes yes, I actually knew it wasn't since the epoch, just very tired :-) but yeah, seconds since 1 Jan 2001 not 1970! That'll teach me to expand when I'm missing a lot of sleep... had I just said "...since the reference date..." I would have been fine :)
J
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