> On Aug 31, 2019, at 2:51 AM, Allan Odgaard via Cocoa-dev
> <cocoa-dev@lists.apple.com> wrote:
>
> On 31 Aug 2019, at 2:49, Carl Hoefs via Cocoa-dev wrote:
>
>> Same result if I run it as a system daemon. So as you suggest it seems there
>> could be some sort of environment sensitivity going on. If only I knew what
>> env var to set in the shell... UTC really isn't what I'm looking for.
>
> The issue appears to be that `NSLog` sends your format string and arguments
> to the unified logging system, this is what Xcode and Console displays, and
> here you get dates formatted using the local time zone.
>
> But it *also* does a simple `stringWithFormat:` and sends the result to
> standard error, at least when running in a terminal. This is where you are
> seeing a more crude formatting of the date which is not adjusted to the local
> time zone.
>
> Open a new tab in your terminal, in that tab run this command:
>
> log stream|grep 'Configured date'
>
> Now run your executable, and in the tab where it is running, you should see
> the UTC date, but in the tab where you are watching the log stream, you get
> the local date.
> _______________________________________________
>
Thanks for the input!
I realized this is occurring because I'm allowing macOS to generate the date
string according to its whims. If I do the string generation, then I can get
consistent results. So I added the following line to my code:
NSString *dateString = [NSDateFormatter
localizedStringFromDate:configuredDate dateStyle:NSDateFormatterFullStyle
timeStyle:NSDateFormatterLongStyle];
and now I get a standardized string I can at least can live with, valid for all
situations:
Configured date: Saturday, August 31, 2019 at 3:55:02 PM PDT
-Carl
P.S.: NSDateFormatter & friends are, shall I say, squirrelly beasts, best left
undisturbed, hiding under the rock ...
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