I seem to have a bug because I'm using -[AVAudioSession setActive:withFlags:error:]
in an iPhone project that is for 3.0 - 4.0.2. So I guess I need to put one of those #IF lines in, so I can get it to do different things based on the OS version... But I can't find out how to do it.
You simply have to check if the method you're trying to call really exists:
if ([AVAudioSession respondsToSelector:@selector(setActive:withFlags:error:)]) {
// call it
}
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