[Q]: Core Data & Bindings, [_NSStateMarker intValue] error [SOLVED]

[Nick Toumpelis]

Thanks for your suggestion, Christiaan.

After searching for hours , I found the little bug(ger) somewhere I  
did not expect. Initially, I thought that it had something to do with  
the Bindings in the NIB file. It was actually in the code, at a point  
where I was observing a key path of a nil object - like you said.

Again, thank you very much for your help,

Nick


On 19 Ιαν 2008, at 1:34 ΠΜ, Christiaan Hofman wrote:

> You probably bind something else, probably to the selection or  
> something. See the NSIsControllerMarker function. You get a state  
> marker when a bound value is invalid, like nil or a multiple value.  
> You should take care that your app handles this correctly when using  
> a bound value.
>
> Christiaan
>
> On 19 Jan 2008, at 12:22 AM, Nick Toumpelis wrote:
>
>> Hi all,
>>
>> I would appreciate any help you can give me on this - I spent ages  
>> trying to solve it and looked everywhere for anything that might  
>> help.
>>
>> I have an NSTableView which is bound to an NSArrayController, which  
>> manages a set of Core Data entities. I also have Add and Remove  
>> buttons, which are connected to the add: and remove: actions of the  
>> controller - a typical use of Core Data and Bindings.
>>
>> When I add the first entity by clicking the Add button or when  
>> saveAction: is called (and in other circumstances), I often get  
>> this error:
>>
>> 2008-01-18 12:25:33.304 blogosphere[10865:10b] *** -[_NSStateMarker  
>> intValue]: unrecognized selector sent to instance 0x10ba60
>>
>> This error, in some cases, is not apparent to the user. In other  
>> cases, it stops the execution of the running method.
>>
>> I would be grateful if you could help me with this or point me to  
>> the right direction.
>>
>>
>> Kind regards,
>>
>> Nick