I'm pretty sure the run-time will sort that all out for you.

But I'm a bit confused here - if you're getting an applicationDidTerminate notification, why not just remove them there anyway?

Sandy

On Mar 13, 2009, at 12:54 PM, Mic Pringle wrote:

But I thought that it was best practice to remove yourself from the
notification center before terminating your application, as doesn't
the notification center live in the objective-c runtime and therefore
is always active, regardless of whether your application is or isn't ?

-Mic

2009/3/13 Mike Abdullah <cocoa...@mikeabdullah.net>:
By definition, if it's a singleton, it will exist for the lifetime of the program; there is no risk of the notification centre sending messages to a
now non-existent object.

On 13 Mar 2009, at 10:31, Mic Pringle wrote:

Hi,

I've been looking into creating a singleton class to manage some
objects that I have that I'd like to be globally available. I've been
reading through
http://www.cocoadev.com/index.pl?SingletonDesignPattern and all looks
well except I now have the following question ...

I'd like my singleton to observe the NSWorkspace notifications
applicationDidLaunch and applicationDidTerminate. I can setup the
observations in the init method, but how to I go about removing them ?
You would normally do in the dealloc method, but it seems you're not
meant to override dealloc in a singleton ? Would it suffice to put
them in the overridden release method ? If so, does this get called
automatically when I close the application ?

If I can't remove the notifications, I could end up with the
notification centre try to foward them to an object that no longer
exists.

Thanks

-Mic
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