Re: [Rubycocoa-talk] Problem with custom NSCell subclass

[Eloy D. <e....@su...>]

Hi Alli,

It works fine for me:

 >> class BarCell < NSCell
 >> def initTextCell(str)
 >>   puts 'here'
 >>   super_initTextCell(str)
 >> end
 >> end
=> nil
 >> BarCell.alloc.initTextCell('foo')
here
=> #<BarCell:0x363df0 class='BarCell' id=0x581390>
 >> BarCell.initTextCell('foo')
OSX::OCMessageSendException: Can't get Objective-C method signature  
for selector 'initTextCell:' of receiver BarCell
	from /Library/Frameworks/RubyCocoa.framework/Resources/ruby/osx/objc/ 
oc_wrapper.rb:50:in `ocm_send'
	from /Library/Frameworks/RubyCocoa.framework/Resources/ruby/osx/objc/ 
oc_wrapper.rb:50:in `method_missing'
	from (irb):10


It looks like you are sending the initTextCell: message to the class  
BarCell instead of to an instance.
So you should first send it the alloc message to get back an instance  
and then send it the initTextCell: message

Cheers,
Eloy

On Apr 11, 2008, at 1:05 PM, Allison Newman wrote:

> Hi everyone (on this apparently rather quiet mailing list!)
>
> I'm having a problem with creating a subclass of NSCell.   
> Specifically, I am trying to initilise it as follows:
>
>    cell = BarCell.initTextCell_("")
>
> The class definition for BarCell looks like this:
>
> class BarCell < NSCell
>  attr_accessor :highlighted
>
>  def initTextCell_(str)
>    super_initTextCell_(str)
>  end
> end
>
> I'm getting back an error that the bridge can't find the Objective-C  
> method for the init...
>
> Can't get Objective-C method signature for selector 'initTextCell:'  
> of receiver BarCell
>
> I've tried everything that I can think of, including playing around  
> with the underscore on the end of the function declarations and  
> references.  Can anyone explain to me what is going on? (I've never  
> had any trouble subclassing NSControls or NSViews)
>
> Alli
>
> -------------------------------------------------------------------------
> This SF.net email is sponsored by the 2008 JavaOne(SM) Conference
> Don't miss this year's exciting event. There's still time to save  
> $100.
> Use priority code J8TL2D2.
> http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone
> _______________________________________________
> Rubycocoa-talk mailing list
> Rub...@li...
> https://lists.sourceforge.net/lists/listinfo/rubycocoa-talk