How can I get notified of a system time change in my Cocoa application?

Question

I have a Cocoa application that records datestamps on events. I need to know when the system time is reset and by how much, but I can\'t seem to fine a notification anywhere

Answer 1

If some on is looking for solution know system date change change event from 10.4

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OSStatus DateChangeEventHandler(EventHandlerCallRef nextHandler, EventRef theEvent, void *userData) 
{
    NSLog(@"Event received!\n");    
    return 0;
}


- (void)SystemTimeChangeHandler
{
    EventTypeSpec eventType;
    eventType.eventClass = kEventClassSystem;
    eventType.eventKind = kEventSystemTimeDateChanged;

    EventHandlerUPP eventHandlerUPP =
    NewEventHandlerUPP(DateChangeEventHandler);
    EventHandlerRef eventHandlerRef = NULL;
    (void)InstallApplicationEventHandler(
                                         eventHandlerUPP,
                                         1,
                                         &eventType,
                                         self,
                                         &eventHandlerRef);

}

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