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Re: plug-in problem

At 3:42 Uhr -0700 02.09.2003, Jon Hull wrote:
I am getting the following errors in the console:
1)Both XXX and YYY have implementations of class CurrentAssignment
2)objc: thread is already initializing this class!

I am a pretty good programmer, but I am afraid that this is beyond me.
I would appreciate any insight that you may have.

Jon,

I think the problem is that you're using a class as your plugin-interface, instead of a protocol. Since both your app and your plugin include an implementation of that class, the linker doesn't know which one to choose (after all, one of them could be newer, or they could be completely different and only accidentally have the same name -- the compiler isn't able to tell).

You'd probably have to put that class in a separate framework, and have both your app and the plugin link to that framework instead of each having their own implementation. Or, if an application itself may export symbols (used to be possible in CFM, don't know about MachO), you could just have your plugin link in the application's version, which is what you really want.

One of the Cocoa pros here (Cocoa-Dev) will be able to tell you how this can actually be achieved. If you find out on your own, be sure to let this list know, since this seems to be a common problem. I had it in ResKnife as well, but then realized that using an interface is actually a much cleaner implementation, as it gives the host application more freedom in how it implements the plugin interface.
--
Cheers,
M. Uli Kusterer
------------------------------------------------------------
"The Witnesses of TeachText are everywhere..."
http://www.zathras.de
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 >plug-in problem (From: Jon Hull <email@hidden>)



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