Re: [Pyobjc-dev] Loading Classes from Private Frameworks with objc.lookUpClass

[Robert K. <rob...@gm...>]

Hey Eric,

I think that MVMailBundle is implemented by the Mail application itself, so you can only look it up within that context (ie running as a plug-in inside Mail). It's not clear to me if you're doing that.

FWIW, my Mail plug-in actually uses `objc.runtime.MVMailBundle` instead of using `objc.lookUpClass()` for that particular class (can't remember why; at some point I switched from using lookUpClass() to using objc.runtime), although I do look up other (Mail-only) classes using it.

– robert

Eric Fernance <er...@di...> wrote on Wed May 06 2015 at 09:13:25:
> Hi Folks,
> 
> I feel like I’ve been banging my head against a wall and looking for a couple of pointers.
> 
> I have seen examples of writing mail.app plugins where the private class is loaded using objc.lookUpClass.  For some reason I seem completely unable to get this to work.
> 
> I have tested from the command line using a variety of class names and any of the classes from public frameworks seem to load just fine (i.e NSOjbect etc).  When I try to load the MVMailBundle class using:
> 
> objc.lookUpClass('MVMailBundle’)
> 
> I receive an error: objc.nosuchclass_error: MVMailBundle
> 
> System details are: Mac OSX 10.10.2
> Python: 2.7
> PyObjC: PyObjC 3.0.4 
> 
> Is there somewhere that I need to switch on or enable the support for loading classes from private frameworks?
> 
> Any guidance would be really appreciated.
> 
> Cheers,
> Eric.
> 
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