Is there any notification for detecting AirPlay in Objective-C?

Question

I am using MPVolumeView for showing Airplay icon and it works fine.

But I need to show an animation when Airplay network comes, and hide that animation when airplay net

Answer 1

To be precise: To check exactly for airplay with public API: NO

All you can do with public API is to check for available wireless routes, which includes airplay in it: (In simple case when you have a MPVolumeView instance hooked up somewhere to your view, you can just call volumeView.areWirelessRoutesAvailable;)

If you are curious how to check if exactly airplay is available with private API:

- (BOOL)isAirplayAvailable
{
    Class MPAVRoutingController = NSClassFromString(@"MPAVRoutingController");
    id routingController = [[MPAVRoutingController alloc] init];

    NSArray* availableRoutes = [routingController performSelector:@selector(availableRoutes)];
    for (id route in availableRoutes) {
        NSDictionary* routeDescription = [route performSelector:@selector(avRouteDescription)];
        if ([routeDescription[@"AVAudioRouteName"] isEqualToString:@"AirTunes"])
            return true;
    }

    return false;
}

(And in fact MPVolumeView has an MPAVRoutingController instance as its ivar, so the -areWirelessRoutesAvailable is just an accessor exactly for [volumeView->_routingController wirelessDisplayRoutesAvailable])

Also AVAudioSession exposes currentRoute to you, so you do can check if airplay is active easily with:

- (BOOL)isAudioSessionUsingAirplayOutputRoute
{
    AVAudioSession* audioSession = [AVAudioSession sharedInstance];
    AVAudioSessionRouteDescription* currentRoute = audioSession.currentRoute;
    for (AVAudioSessionPortDescription* outputPort in currentRoute.outputs){
        if ([outputPort.portType isEqualToString:AVAudioSessionPortAirPlay])
            return true;
    }

    return false;
}

(the answer about AirPlayDetector doesn't guarantee that Airplay is available - all it does it checks the alpha value of MPVolumeView's routeSelection button, which will be shown in any case when wireless routes are available, bluetooth for example. It will do exactly the same as volumeView.areWirelessRoutesAvailable;)