John,
You're right. Using XCode this happened all the time.
Also, it appears to happen if you have copied the app to 2 different locations, and click on both the different locations.
Which brings up a related issue: currently we're planning to distribute with a .DMG file that contains the app and perhaps a readme file with the expectation that the user will know to copy this to a convenient place: perhaps the desktop, perhaps the Applications folder. Is this a reasonable assumption? And if so, what happens if they move it later? In particular, the file associations seem to be to a particular path to the app, and if that path changes, what happens to the file associations?
--Daniel
----------------------------------------
> CC: email@hidden
> From: email@hidden
> Subject: Re: One instance of app running
> Date: Fri, 12 Jan 2007 13:35:54 -0800
> To: email@hidden
>
> Perhaps your application bundle is set up wrong?
> Without going to extreme measures it's usually not possible to make a
> Mac app which can launch multiple instances.
>
>
> On Jan 12, 2007, at 1:26 PM, Daniel Birns wrote:
>
> >
> > All,
> >
> > I need to ensure that there's only one instance of my app running.
> > Some of this seems to happen automatically -- for example, if I
> > click on my doc-type, it starts up the app if it's not running, or
> > sends an open doc event to it if it is running. But if I click on
> > the app it starts another instance, and this is what I don't want
> > to have happen. Instead, I'd like it to turn into a reopen apple
> > event to the existing instance.
> >
> > --Daniel
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