Re: handleGetURLEvent getting called after applicationDidFinishLaunching
Re: handleGetURLEvent getting called after applicationDidFinishLaunching
- Subject: Re: handleGetURLEvent getting called after applicationDidFinishLaunching
- From: "Bradley O'Hearne" <email@hidden>
- Date: Tue, 20 Aug 2013 17:41:50 -0700
On Aug 20, 2013, at 1:05 PM, Jens Alfke <email@hidden> wrote:
>
> On Aug 20, 2013, at 11:38 AM, Bradley O'Hearne <email@hidden> wrote:
>
>> 1. Is there any guaranteed invocation order of these methods, or is it completely random? I cannot think of any scenario where you'd want to process the URL launching event *after* the callback which signifies app launch completion. That just seems wrong.
>
> Under the hood, the mechanism is that the Launch Services options for launching an app can include an AppleEvent to send the app upon launch. Most commonly this is an ‘odoc’ (open document) event, if the app was launched by double-clicking a document. In the case of opening via a URL, as in your case, that event would be a ‘GURL’ (goto URL). In the case where there’s no AppleEvent given, the app receives an ‘oapp’ (open app) event just to tell it that it isn’t going to get a different special event.
>
> The reason for ‘oapp’ is for the exact thing you’re describing: the app wants to know when it’s done launching, i.e. when the special launch-time events are over.
>
>> 2. Assuming that the answer to 1 is that there IS an expected invocation order, then what could possibly cause this problem? This smells an awful lot like something to do with unexpected results of thread scheduling in the OS (not in the app, I'm creating no threads at all).
>
> It might be an AppKit bug, or it might be in the Finder (e.g. maybe it’s launching the app normally and then sending the GURL event, instead of attaching the event to the launch options.)
>
> —Jens
Jens,
In my case, the URL is custom, configured with launch services and in my app's info.plist file. The app is launched by opening a URL with the specified protocol from a web browser. It is not being launched any other way (such as from the Finder).
Brad
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