Re: C callbacks with NSNotificationCenter?
Re: C callbacks with NSNotificationCenter?
- Subject: Re: C callbacks with NSNotificationCenter?
- From: email@hidden
- Date: Thu, 08 Sep 2016 01:49:01 +0900
It's not Toll Free bridged.
And Fritz, you contribute so much to folks, nobody would blink if you missed anything.
Sent from my iPhone
> On Sep 8, 2016, at 1:41 AM, Fritz Anderson <email@hidden> wrote:
>
> “dangerwillrobinsondanger” correctly points to Core Foundation. I’m embarrassed to have forgotten ― it should be very helpful to you, assuming it mixes with AVFoundation.
>
>> On 7 Sep 2016, at 11:33 AM, じょいすじょん <email@hidden> wrote:
>>
>> 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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