I want my app to run on 10.6 but use 10.7 features where available. Thus I'm
compiling on 10.11 using -mmacosx-version-min=10.6. In particular, I want to
use AVFoundation to play videos on 10.7 and better.
To open a video, I do the following:
AVPlayer *p = [[AVPlayer alloc] initWithURL:url];
I'd expect this code to crash on 10.6 because 10.6 doesn't have AVPlayer.
To my surprise, however, the code doesn't crash and it just returns NULL.
This is fine because then my app will just show a message box informing
the user that the file couldn't be opened and no other AVFoundation APIs
will be accessed.
However, I'm wondering whether it is ok to execute this code on 10.6 without
any safeguard. I thought I'd have to do something like this instead:
if(floor(NSAppKitVersionNumber) >= NSAppKitVersionNumber10_7) {
AVPlayer *p = [[AVPlayer alloc] initWithURL:url];
...
} else {
return NULL;
}
Do I have to do this or can I just rely on alloc/init returning NULL for
classes unknown on 10.6?
--
Best regards,
Andreas Falkenhahn mailto:andr...@falkenhahn.com
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