Re: [Pyobjc-dev] Calling methods with variable arguments

[Dirk S. <dir...@ma...>]

Hi Ian,

I'm not completely clear on the technical details of how BridgeSupport  
definitions are used in PyObjC, but here's some possible pointers:

search for "withObjects" in the file linked below and you'll find the  
exceptions defined for NSArray.arrayWithObjects: and other similar  
methods:
> http://svn.red-bean.com/pyobjc/trunk/pyobjc/pyobjc-framework-Cocoa/Exceptions/Foundation.bridgesupport


This test file shows how to explicitely add metadata to a class  
description at runtime:
> http://svn.red-bean.com/pyobjc/trunk/pyobjc/pyobjc-core/PyObjCTest/test_metadata_py.py


The example at line 45 seems to do something similar to what you need:

     objc.registerMetaDataForSelector("OC_MetaDataTest",  
"makeObjectArray:on:",
             dict(
                 arguments={
                   2+0:  dict(type_modifier=objc._C_IN,  
c_array_delimited_by_null=True, null_accepted=False),
                 }
             )
         )

Good luck :)
- Dirk

On Jul 3, 2009, at 4:40 AM, Ian Beck wrote:

> Hey there,
>
> I'm currently loading up a custom Cocoa framework, and one of the
> methods I need to call involves variable arguments terminated by nil:
>
> [buildSomethingNamed:@"Name" withObjects:@"one", @"two", nil]
>
> I know that PyObjC typically has problems with varargs and needs a
> special wrapper.  Is there anything I can do at my end (that is,
> outside the framework) to wrap this particular method and get it to
> work with PyObjC?
>
> Even a pointer to somewhere to find example code for dealing with
> varargs would be helpful; Google wasn't terribly useful.
>
> Ian
>
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