Re: Stupid objective-c question
Re: Stupid objective-c question
- Subject: Re: Stupid objective-c question
- From: Gabriel Zachmann <email@hidden>
- Date: Thu, 22 Sep 2016 12:16:18 +0200
>> As to the context type, I would be interested to know of cases where the observer doesn't have control over the context. My understanding is that the context is something that the observer sets itself when calling addObserver, and it is passed back to itself in the above method call. So the observer should know what kind of entity the context is, and can determine the best way to compare this value.
>
> Subclasses or superclasses can register observers, so it’s possible for your observer method to get called for observations that you didn’t create.
>
That makes me wonder: why isn't it possible to register several, different observers for the same thing?
That way, I wouldn't need to care about observations I didn't create, would I?
Forgive my ignorance ...
Best regards,
Gabriel.
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