Re: C callbacks with NSNotificationCenter?
Re: C callbacks with NSNotificationCenter?
- Subject: Re: C callbacks with NSNotificationCenter?
- From: じょいすじょん <email@hidden>
- Date: Thu, 08 Sep 2016 01:33:28 +0900
Have you considered Core Foundation?
https://developer.apple.com/library/ios/documentation/CoreFoundation/Reference/CFNotificationCenterRef/
It is all C
Another alternative is to look at the Objective-C runtime library routines.
You can do a lot with the language from C...
> On 2016 Sep 8, at 1:09, Andreas Falkenhahn <email@hidden> wrote:
>
> As a C programmer I'm trying to avoid Objective C whenever and wherever possible.
> The good thing is that I can do most interaction with Cocoa from normal C functions.
> I only had to write very few classes. Most of the Cocoa stuff can be done
> from normal C functions just fine.
>
> Now I'd like to subscribe to the AVPlayerItemDidPlayToEndTimeNotification
> notification. In an Objective C class, this is purportedly done like this:
>
> [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(itemDidFinishPlaying:) name:AVPlayerItemDidPlayToEndTimeNotification object:playerItem];
>
> This will call the "itemDidFinishPlaying" method in class "self" whenever
> an AVPlayerItem has finished playing.
>
> Of course, I can't use this code in a normal C function because there are
> references to "self" and the selector thing doesn't look like it's compatible to
> C. So I could just subclass AVPlayerItem and voila, everything's fine.
>
> Still, I'm wondering: Is it also possible to have NSNotificationCenter call
> a C function for me whenever the notification triggers? Can this somehow
> be achieved or am I forced to use full Objective C here?
>
> --
> Best regards,
> Andreas Falkenhahn mailto:email@hidden
>
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