Re: progress bar not updating
Re: progress bar not updating
- Subject: Re: progress bar not updating
- From: Jens Alfke <email@hidden>
- Date: Thu, 06 Oct 2016 10:43:42 -0700
> On Oct 6, 2016, at 10:04 AM, J.E. Schotsman <email@hidden> wrote:
>
> Its doubleValue is bound to the progress value of my ProgressController class, so is “animating" and “indeterminate".
> ...
> The progress value and other values are changed on a background thread.
That means that KVO is going to call the view’s observeChange method on your background thread, not on the main thread. Which I believe qualifies as “updating the UI from a background thread”, which is illegal. It may be that the view has fail-safe code to check for this and ignores the change. Have you checked the console for warnings?
(Disclaimer: It’s been way too long since I did any serious AppKit coding, so for all I know, maybe this setup is legal now. But this does seem a likely reason why things aren’t working.)
—Jens
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