Re: Singleton Help ...
Re: Singleton Help ...
- Subject: Re: Singleton Help ...
- From: Mic Pringle <email@hidden>
- Date: Fri, 13 Mar 2009 11:19:37 +0000
Because it's the applicationDidTerminate notification from
NSWorkspace, informing me about other applications closing, not my
own.
-Mic
2009/3/13 Sandy McGuffog <email@hidden>:
> 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 <email@hidden>:
>>>
>>> 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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