On Dec 18, 2012, at 9:27 AM, Keith Knauber <kknau...@prg.com> wrote:
> Automatic relaunch of your app is such a basic software requirement,
It is?
> and apple has never published a clean method for accomplishing this.
Ape's crash reporter offers to relaunch the app.
> There are situations when a relaunch of an app is much safer, faster, and
> fault tolerant than an approach which kills every background thread,
> deletes all your NSDocument objects, and open a new NSDocument.
The desired user experience is that after a relaunch NSDocumentController
reopens all the documents that were open at the time of the crash.
>
> - (void) applicationWillTerminate:(NSNotification *)notification
> {
> … do clean-up tasks like NSUserDefaults synchronize, etc. …
>
> if ( ! userWantsRelaunch )
> return;
This won't be executed if you crash, and you certainly shouldn't trap all
exceptions and go through the normal quit process to make it do so.
Are you trying to auto relaunch for reasons other than a crash? If so, why?
If it's for software update reasons, then self-exec is not a good idea because
the old version app will likely remain mapped and will be relaunched. Better to
have a helper script that waits for the process to quit and the file to be
replaced before actually doing the launching.
I can't really think of any reason other than crash or self-update where
relaunching the app is the correct user experience.
--Kyle Sluder
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