perhaps I didn't say this earlier, but the problem is not a run-time error as 
such; the app doesn't launch. Maybe that provides a clue as to what's wrong?

Martin


On Aug 15, 2011, at 07:56 PM, Martin Hewitson wrote:

> Is it ok to declare a property to be NSPopover, even if that class doesn't 
> exist on 10.6? 
> 
> I tried the 
> 
> if ([NSPopover class]) {}
> 
> trick, but I get the same error when running on 10.6.8. I'll try some more in 
> case I made a mistake, but….
> 
> Thanks!
> 
> Martin
> 
> On Aug 15, 2011, at 07:47 PM, Kyle Sluder wrote:
> 
>> On Mon, Aug 15, 2011 at 10:45 AM, David Duncan <david.dun...@apple.com> 
>> wrote:
>>> In either case, the best general way to determine availability of 
>>> weak-linked implementations is to test for them directly rather than using 
>>> a system version check (like gestalt). If your using Clang (which I suspect 
>>> you are not given your error) you could just use:
>>> 
>>> "if ([NSPopover class]) { /* do stuff with popovers */ } else { /* do stuff 
>>> without */ }"
>> 
>> Is it the case that this check will only work on 10.6.8 or newer, and
>> that one should fall back on NSClassFromString() if supporting an
>> older version of Snow Leopard?
>> 
>> --Kyle Sluder
> 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Martin Hewitson
> Albert-Einstein-Institut
> Max-Planck-Institut fuer 
>    Gravitationsphysik und Universitaet Hannover
> Callinstr. 38, 30167 Hannover, Germany
> Tel: +49-511-762-17121, Fax: +49-511-762-5861
> E-Mail: martin.hewit...@aei.mpg.de
> WWW: http://www.aei.mpg.de/~hewitson
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> 
> 
> 
> 

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Martin Hewitson
Albert-Einstein-Institut
Max-Planck-Institut fuer 
    Gravitationsphysik und Universitaet Hannover
Callinstr. 38, 30167 Hannover, Germany
Tel: +49-511-762-17121, Fax: +49-511-762-5861
E-Mail: martin.hewit...@aei.mpg.de
WWW: http://www.aei.mpg.de/~hewitson
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~





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