On 17.07.2008, at 12:50, Mitchell Livingston wrote:
I need to pass the location to a c library and reset the location in
this library when the application is moved, so I need a way to know
when the app is moved.
How can I call it again if I don't know it moved? Waiting until it
fails is a bit too late in the process. Sure, chances are the app
won't move, but why should it ever fail? Storing it in the library
folder is not a real good option.
As someone else said, use a kqueue to detect the app move. I wrote a
nice little wrapper class around kqueues for uses like this, find it at
<http://www.zathras.de/angelweb/sourcecode.htm#UKKQueue>
Watch your application bundle folder with that, and when it notifies
you that you've been moved, you can call into your library, passing
whatever NSBundle pathForResource: returns then.
Just be aware that Cocoa itself is kinda stupid about coping with the
current app's bundle being moved (different from Carbon, funnily
enough). So, while your library might still access the correct
folders, the rest of your app may still go down in flames. Come to
think of it, I'm not even sure whether NSBundle doesn't cache its
location, so you might get the old path back. But I guess since the
kqueue tells you where it got moved, you could deduce the path anyway.
Cheers,
-- Uli Kusterer
"The Witnesses of TeachText are everywhere..."
http://www.zathras.de
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