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Confused about CFRunLoop
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Confused about CFRunLoop


  • Subject: Confused about CFRunLoop
  • From: Brian Greenstone <email@hidden>
  • Date: Mon, 17 Mar 2008 21:53:13 -0500

I'm trying to convert some old Carbon code over to Cocoa, and one of the things I'm doing is converting my old run-loop timers. I used to use the following code:

	InstallEventLoopTimer(..);
	RunApplicationEventLoop();
	..
	QuitApplicationEventLoop();

That always worked fine, so now I'm trying to do it this way:

	CFRunLoopTimerCreate(..);
	CFRunLoopAddTimer(..);
	CFRunLoopRun();

Unfortunately, these CF run loops behave differently. When I call CFRunLoopRun, my timer does fire off like it should, but it appears to be running in a modal loop where I do not have access to the menu bar, and my windows no longer receive any mouse click events et.al. So, as an experiment, I tried replacing the CFRunLoopRun() with:

	[[NSApplication sharedApplication] run];

That actually works! My timer fires off like it should, yet everything else works too. I can still access the menus, and window still receive click events. Unfortunately, there's no way to exit that event loop as far as I can tell. I tried this...

	CFRunLoopStop(CFRunLoopGetCurrent());

... but that did nothing.

So, can someone explain the correct way to install a Timer, have the system keep working like normal, and then be able to quit that event loop from the timer's callback?


Thanks,

-Brian




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  • Follow-Ups:
    • Re: Confused about CFRunLoop
      • From: Eric Schlegel <email@hidden>
    • Re: Confused about CFRunLoop
      • From: "Kyle Sluder" <email@hidden>
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