> On Dec 18, 2019, at 10:25 AM, Steve Mills via Cocoa-dev > <cocoa-dev@lists.apple.com> wrote: > >> On Dec 18, 2019, at 11:19, Carl Hoefs via Cocoa-dev >> <cocoa-dev@lists.apple.com> 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.
Thanks for the tip! However, I cannot get this notification to fire on system time changes. My other notifications (such as sleep wake, etc) do fire. -Carl [[[NSWorkspace sharedWorkspace] notificationCenter] addObserver: self selector: @selector(systemTimeChanged:) name: NSSystemClockDidChangeNotification object: NULL]; -(void) systemTimeChanged: (NSNotification *) notification { NSLog(@"-systemTimeChanged: %@", [notification name]); } _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) 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 arch...@mail-archive.com