Re: NSNotificationCenter not always working?
Re: NSNotificationCenter not always working?
- Subject: Re: NSNotificationCenter not always working?
- From: Laurent Daudelin <email@hidden>
- Date: Fri, 19 Nov 2010 12:35:29 -0800
On Nov 19, 2010, at 12:16, Matt Neuburg wrote:
>
>> Date: Fri, 19 Nov 2010 11:58:35 -0800
>> From: Laurent Daudelin <email@hidden>
>> Subject: NSNotificationCenter not always working?
>>
>> Is there a way to debug why the same "postNotificationName:object:userInfo:" would not work the second time it's called?
>
> In a word - no. This is one of the worst aspects of NSNotificationCenter; I have complained about it many times, filed bugs, etc., and I suggest you do the same. In particular we need a way to ask the center what's registered with it, and for what.
>
> The last time I had a problem such as you describe, it turned out that my own code, far off in a different file, was unregistering me - so, the second time the notification was posted, I was no longer an observer. This was discovered essentially by simple reading all my code really carefully. In fact, by the time I figured it out, I had actually stopped using notifications in that project, because they were so hard to debug.
>
> I complained about this and did receive an interesting suggestion about breakpoints; but this is not as good as a simple ability to query the notification center would be.
>
> <http://www.cocoabuilder.com/archive/cocoa/157926-how-to-debug-notification-that-never-received.html>
>
> And of course a tiny misspelling in the name of a notification will get you too. This can be largely avoided by using a #define but people are often lazy about that.
>
> m.
Thanks, Matt. I'm of course using defines for my only notification name. I'm suspecting it's my code as well but it's fairly straightforward. I'll revise my code and see what I can do but I was afraid that in the case of NSNotificationCenter, there wasn't much I could do, hence my question. Maybe will override some methods through a protocol to see if some of the steps are working as they should.
If anybody has any insight, suggestions are welcomed.
-Laurent.
--
Laurent Daudelin
AIM/iChat/Skype:LaurentDaudelin http://www.nemesys-soft.com/
Logiciels Nemesys Software email@hidden
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