Configure AVAudioSession for specific SwiftUI views

AudioSession.swift

import AVFoundation
import OSLog

private let log = Logger(subsystem: "Whatever", category: "AudioSession")

enum AudioSession {
    enum Source: String {
        case videoPlayback = "video playback"
        // ... add your othe use-cases here
    }
  
    private static let session = AVAudioSession.sharedInstance()

    static func activate(_ source: Source) {
        do {
            // Only needs to be done once, could do at app launch, or parameterize the category/mode and pass in from the view modifier if it varies from view to view
            try session.setCategory(.playback, mode: .moviePlayback)
            try session.setActive(true, options: [.notifyOthersOnDeactivation])
        }
        catch {
            log.error("Failed to activate audio session for \(source.rawValue): \(error)")
        }
    }

    static func deactivate(_ source: Source) {
        do {
            try session.setActive(false, options: [.notifyOthersOnDeactivation])
        }
        catch {
            log.error("Failed to deactivate audio session for \(source.rawValue): \(error)")
        }
    }
}

AudioSessionConfigurableModifier.swift

import SwiftUI

struct AudioSessionConfigurableModifier: ViewModifier {
    let source: AudioSession.Source

    func body(content: Content) -> some View {
        content
            .onAppear {
                AudioSession.activate(source)
            }
            .onDisappear {
                AudioSession.deactivate(source)
            }
    }
}

extension View {
    func withAudioSession(_ source: AudioSession.Source) -> ModifiedContent<Self, AudioSessionConfigurableModifier> {
        modifier(AudioSessionConfigurableModifier(source: source))
    }
}

ExampleView.swift

import SwiftUI

struct ExampleView: View {
    var body: some View {
        SomeVideoPlayer()
            .withAudioSession(.videoPlayback)
    }
}