Re: Singleton Help ...
Re: Singleton Help ...
- Subject: Re: Singleton Help ...
- From: Mic Pringle <email@hidden>
- Date: Fri, 13 Mar 2009 10:54:45 +0000
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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