Well I feel a little dumb now. After lots of debugging and digging at values that looked correct everywhere, checking object creating again & again, and what not, It turns out I forgot to actually redraw the window:
[[[self loadingWindowController] window] display];
Everything worked all along :P
Mikkel
On Nov 30, 2010, at 6:39 PM, Mikkel Eide Eriksen wrote:
> On Nov 30, 2010, at 5:34 PM, Quincey Morris wrote:
>> On Nov 29, 2010, at 21:36, Mikkel Eide Eriksen wrote:
>>
>>> I'm updating the objectCount property during readFromURL:ofType:error: -
>>> could that be it?
>>
>> No, that's a suitable method, but the question is whether it's running in
>> the main thread or if the document initialization process got switched to a
>> background thread for some reason. (That would only happen if you wrote code
>> to make it happen.)
>>
>> Previously, you logged 'addObserver:...' to establish that the observer of
>> document.objectCount got registered. You could also trying to see whether
>> "objectCount" notifications are being issued at all. Have some object (e.g.
>> the loading window controller itself) manually observe the property and see
>> whether the observer gets told when the property changes.
>
> I just implemented - (void)observeValueForKeyPath:ofObject:change:context: on
> my LoadingWindowController and registering as an observer of
> MyDocument.objectCount. I do indeed get notifications if I do it this way.
>
>> Another possibility is that you've (somehow) caused two document objects to
>> be created. That sort of thing can happen when you [also] instantiate an
>> object in a nib file that's normally created in code. Or it could be 2
>> window controllers, or 2 windows.
>
>
> I also added some symbolic breakpoints to the -init methods of MyDocument &
> MyLoadingWindowController but only one of each are created so it doesn't
> appear there's a rogue object there.
>
>
> What about the Options: <New: NO, Old: NO, Prior: NO> below? As I read it, it
> seems that MyLoadingWindowController registers the NSTextField of its nib as
> an observer, but the text field doesn't want any values (ie no
> notifications)? Or does that just mean that the the text field will call back
> to MyDocument and grab the property for itself when/if it receives a
> notification?
>
> 2010-11-30 18:26:12.192 MyCoreData[57991:a0f] MyLoadingWindowController
> addObserver:<NSTextValueBinder: 0x20026d680>{object: <NSTextField:
> 0x200284240>, bindings: value=document.objectCount}
> forKeyPath:"document.objectCount" options:context:
> 2010-11-30 18:26:12.192 MyCoreData[57991:a0f] MyDocument
> addObserver:<NSKeyValueObservance 0x200256780: Observer: 0x20026d680, Key
> path: document.objectCount, Options: <New: NO, Old: NO, Prior: NO> Context:
> 0x20025ba80, Property: 0x2000f3ba0> forKeyPath:"objectCount" options:context:
>
> Mikkel
>
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