On 7/30/14, 11:24 AM, "Jens Alfke" <[email protected]> wrote: >After NSDateFormatter parses a date string that includes a time zone, how >can the caller determine the time zone? The result is an NSDate object, >which is simply a timestamp with no notion of time zone. > >For example, how does one determine from the string "Wed, 30 Jul 2014 >08:21:35 -0700² that the time zone is GMT-7:00? > >(IIRC, in the olden days NSDateFormatter would return an NSCalendarDate >object, which did have a timeZone property, but no more.)
Your date string does not have a time zone. These internet date strings are always in UTC. Your string has a GMT offset. You could parse "-0700" to determine the GMT offset. It starts with a '+' or '-' followed by 2 digits for hours, then 2 digits for minutes. I realize that this is not the answer you're looking for, but your string doesn't contain a time zone. You could also parse "Wed, 30 Jul 2014 08:21:35 -0000" (replacing "-0700" with "-0000"), then use timeIntervalSinceDate: with the original date to get the GMT offset in seconds. The following code will parse your time date string. NSDateFormatter * dateFormatter; NSLocale * enUSPOSIXLocale; NSString * dateString = @"Wed, 30 Jul 2014 08:21:35 -0700"; dateFormatter = [[NSDateFormatter alloc] init]; enUSPOSIXLocale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"]; [dateFormatter setLocale:enUSPOSIXLocale]; [dateFormatter setDateFormat:@"EEE, dd MMM yyyy HH:mm:ss z"]; [dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]]; NSDate * myDate = [dateFormatter dateFromString:dateString]; NSLog(@"%@", [myDate description]); More info: https://developer.apple.com/library/ios/qa/qa1480/_index.html Chuck _______________________________________________ Cocoa-dev mailing list ([email protected]) 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: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
