ente/mobile/ios/Runner/AppDelegate.swift

import Flutter
import UIKit
import AVFoundation

@main
@objc class AppDelegate: FlutterAppDelegate {
  override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
  ) -> Bool {

    if #available(iOS 10.0, *) {
      UNUserNotificationCenter.current().delegate = self as UNUserNotificationCenterDelegate
    }

    let controller : FlutterViewController = window?.rootViewController as! FlutterViewController
    let audioSessionChannel = FlutterMethodChannel(name: "io.ente.frame/audio_session",
                                                   binaryMessenger: controller.binaryMessenger)
    
    audioSessionChannel.setMethodCallHandler({
      (call: FlutterMethodCall, result: @escaping FlutterResult) -> Void in
      if call.method == "setAudioSessionCategory" {
        self.setAudioSessionCategory(result: result)
      } else {
        result(FlutterMethodNotImplemented)
      }
    })

    GeneratedPluginRegistrant.register(with: self)

    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }

  private func setAudioSessionCategory(result: @escaping FlutterResult) {
    do {
      try AVAudioSession.sharedInstance().setCategory(.playback, mode: .default, options: [.mixWithOthers, .defaultToSpeaker])
      try AVAudioSession.sharedInstance().setActive(true)
      result(nil)
    } catch {
      result(FlutterError(code: "AUDIO_SESSION_ERROR",
                          message: "Failed to set audio session category",
                          details: error.localizedDescription))
    }
  }

  override func applicationDidBecomeActive(_ application: UIApplication) {
    signal(SIGPIPE, SIG_IGN)
  }

  override func applicationWillEnterForeground(_ application: UIApplication) {
    signal(SIGPIPE, SIG_IGN)
  }
}