List available output audio target AVAudioSession

Question

I need to list the audio outputs available to an iOS application. My question is similar to this one: How to list available audio output route on iOS

i tried this co

Answer 1

It will depend on your AVAudioSession category.

You can safely assume on an iPhone that you have at least a microphone as input and a speaker as output. If you're trying to get a list of Bluetooth/AirPlay outputs, first you'd have to make sure your session category is reporting them to you:

do 
{
    try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord, withOptions: .AllowBluetooth)
    try audioSession.setActive(true)
} 
catch let e
{
    debugPrint("failed to initialize audio session: \(e)")
}

Then a non-intuitive way to get available outputs is to check AVAudioSession.availableInputs as usually a bluetooth HFP device would have a mic too.. I might be assuming a lot right now.. but that's the only way to consistently get your availableOutputs.

A better way is to use MultipleRoute category which will give you more freedom at accessing AVAudioSessionPort