Re: [Rubycocoa-talk] Can't get Objective-C method signature in Leopard

[Eloy D. <elo...@gm...>]

Hey Rod,

I used to have a problem similar to this one.
In my case I was unable to add/override instance methods, but was able  
to add/override class methods.
Anyways, I have tried my code again to see if the problem still  
persisted in the current trunk, which it doesn't.

Which version of RC are you using? The one that ships with Leopard?
If so, could you give the trunk a try?

Cheers,
Eloy

On 3 nov 2007, at 20:56, Rod Schmidt wrote:

> The OSX module is required.
>
> I have imported the BackpackReminder class.
>
> 3) The CSS_class method does not exist on the ObjC side.
>
> One other piece of information is that BackpackReminder descends from
> NSManagedObject. Could CoreData be messing things up? The inheritance
> hierarchy is:
>
> NSManagedObject -> BackpackManagedObject -> BackpackReminder
>
> Rod
>
> On Nov 3, 2007, at 1:07 PM, Laurent Sansonetti wrote:
>
>> On Nov 3, 2007 1:18 PM, Rod Schmidt <rsc...@xm...> wrote:
>>> I have the following Ruby code in my RubyCocoa app (in which I have
>>> mostly Objective-C with some Ruby).
>>>
>>> class BackpackReminder
>>>       def CSS_class
>>>               date = NSDateToRubyDateTime(self.date)
>>>               now = DateTime.now
>>>               days_from_now = date.jd - now.jd
>>>               if days_from_now <= 30 then
>>>                       "day#{days_from_now}"
>>>               else
>>>                       "month#{self.months_from_now}"
>>>               end
>>>       end
>>> end
>>>
>>> BackpackReminder is an Objective-C class, so I am reopening this
>>> class
>>> and adding the CSS_Class method. This worked fine in Tiger. When I
>>> run
>>> the app I get the following:
>>>
>>> 11/3/07 12:55:52 PM PackRat[1109] PageGenerator#generateHTML:
>>> OSX::OCMessageSendException: Can't get Objective-C method signature
>>> for selector 'CSS:class' of receiver
>>> #<OSX::BackpackReminder_BackpackReminder_:0x265a5c
>>> class='BackpackReminder' id=0x6115b0>
>>> 11/3/07 12:55:52 PM PackRat[1109] Exception raised during posting of
>>> notification.  Ignored.  exception: 'Can't get Objective-C method
>>> signature for selector 'CSS:class' of receiver
>>> #<OSX::BackpackReminder_BackpackReminder_:0x265a5c
>>> class='BackpackReminder' id=0x6115b0>'  invoked observer method:
>>> '*** -
>>> [PackRatAppDelegate tableViewSelectionDidChange:]'  observer:
>>> 0x6f3dd0  notification name:
>>> 'NSTableViewSelectionDidChangeNotification'
>>>
>>> If I rename the method and remove the underscore and rename it
>>> something like CSSClass, I get the same message (with the method  
>>> name
>>> changed of course). Has something changed in the Leopard version of
>>> RubyCocoa that prevents you from reopening classes and adding
>>> methods?
>>>
>>
>> No, nothing changed in this logic. However, most of the code that  
>> adds
>> or overrides methods was ported to the ObjC 2.0 API, and maybe there
>> is a regression in that area.
>>
>> I am nevertheless unable to reproduce this in a quick test.
>>
>> A few questions:
>>
>> 1/ Is the OSX module required?
>>
>> 2/ Does it also happen if you explicitly import the BackpackReminder
>> class before doing the override? You can add ''OSX.ns_import :
>> BackpackReminder'' at the beginning of the file to try that.
>>
>> 3/ Does the CSS_class method exists in the ObjC side?
>>
>> Thanks,
>> Laurent
>>
>> -------------------------------------------------------------------------
>> This SF.net email is sponsored by: Splunk Inc.
>> Still grepping through log files to find problems?  Stop.
>> Now Search log events and configuration files using AJAX and a
>> browser.
>> Download your FREE copy of Splunk now >> http://get.splunk.com/
>> _______________________________________________
>> Rubycocoa-talk mailing list
>> Rub...@li...
>> https://lists.sourceforge.net/lists/listinfo/rubycocoa-talk
>
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by: Splunk Inc.
> Still grepping through log files to find problems?  Stop.
> Now Search log events and configuration files using AJAX and a  
> browser.
> Download your FREE copy of Splunk now >> http://get.splunk.com/
> _______________________________________________
> Rubycocoa-talk mailing list
> Rub...@li...
> https://lists.sourceforge.net/lists/listinfo/rubycocoa-talk