Re: NSWorkspace notifications related to time change
Re: NSWorkspace notifications related to time change
- Subject: Re: NSWorkspace notifications related to time change
- From: Carl Hoefs via Cocoa-dev <email@hidden>
- Date: Wed, 18 Dec 2019 12:35:39 -0700
On Dec 18, 2019, at 12:31 PM, Jean-Daniel via Cocoa-dev
<email@hidden> wrote:
>
>
>> Le 18 déc. 2019 à 18:25, Steve Mills via Cocoa-dev
>> <email@hidden> a écrit :
>>
>>> On Dec 18, 2019, at 11:19, Carl Hoefs via Cocoa-dev
>>> <email@hidden> wrote:
>>>
>>> I have a macOS daemon that uses NSTimers for scheduling user event
>>> reminders.
>>>
>>> This works well except for abrupt time changes:
>>> (1) the user explicitly changes the date/time
>>> (2) the user crosses into a different time zone
>>> (3) daylight saving time comes/goes.
>>> Then I need to recalculate the timers based on the new current time.
>>>
>>> The Apple docs don't list any NSWorkspace notifications related to the
>>> above.
>>> How can I handle these cases?
>>
>> Look in a different header, one related to time; NSDate.h, where you’ll find
>> NSSystemClockDidChangeNotification.
>>
>> Steve via iPhone
>
>
> Note that 2 and 3 are not time change from the system point of view. The
> system clock don’t change in such cases.
>
> You may have some luck with NSSystemTimeZoneDidChangeNotification though (as
> daylight saving time is usually considered a change of timezone).
Didn't know about NSSystemTimeZoneDidChangeNotification, but I get no
notification with it either.
-Carl
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