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Re: [Rubycocoa-talk] Can't get Objective-C method signature in Leopard
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From: Rod S. <rsc...@xm...> - 2007-11-04 16:49:12
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I am using the one that ships with Leopard.
Is it possible to install the trunk and keep things separate? I don't
want to mess up my Leopard install.
Also, I had to release to fix these bugs so I moved the methods back
into Objective-C.
Rod
On Nov 4, 2007, at 7:03 AM, Eloy Duran wrote:
> 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
>>>
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>>
>>
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>
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