Ios 在WebRTC视频通话期间，耳机无法提供音频

我已经从iPhone设备连接到耳机，但在视频通话中听不到耳机发出的声音。它每次都在用扬声器听

请在下面找到响应路线更改的音频代码：

func activateHeadPhonesStatus(){
    NotificationCenter.default.addObserver(self, selector: #selector(audioRouteChangeListener(_:)), name: NSNotification.Name.AVAudioSessionRouteChange, object: nil)
}

@objc func audioRouteChangeListener(_ notification:Notification) {
    guard let userInfo = notification.userInfo,
        let reasonValue = userInfo[AVAudioSessionRouteChangeReasonKey] as? UInt,
        let reason = AVAudioSession.RouteChangeReason(rawValue:reasonValue) else {
            return
    }
    switch reason {
    case .newDeviceAvailable:
        let session = AVAudioSession.sharedInstance()
        for output in session.currentRoute.outputs where output.portType == AVAudioSessionPortHeadphones {
            print("headphone plugged in")
            AppDelObj.providerDelegate.videoCallRTC?.speakerOff()
            break
        }
    case .oldDeviceUnavailable:
        if let previousRoute =
            userInfo[AVAudioSessionRouteChangePreviousRouteKey] as? AVAudioSessionRouteDescription {
            for output in previousRoute.outputs where output.portType == AVAudioSessionPortHeadphones {
                print("headphone pulled out")
                AppDelObj.providerDelegate.videoCallRTC?.speakerOn()
                break
            }
        }
    case .routeConfigurationChange:
        print("routeConfigurationChange")
    case .categoryChange:
        print("categoryChange")
    default: ()
    }
    
}

---

您应该配置默认音频会话以使用所需的内容，如以下示例所示：

do {
     try AVAudioSession.sharedInstance().setCategory(.playAndRecord, mode: .videoChat, options: [.mixWithOthers, .defaultToSpeaker, .allowBluetooth, .allowAirPlay])
 } catch {
   print(error)
 }

---

解决此问题最方便用户的方法是使用AVRoutePickerView，它允许用户选择适当的输出。您只需使用此包装器并将其作为工具栏按钮之一

import SwiftUI
import AVKit

struct AudioRoutePickerView: UIViewRepresentable {
    typealias UIViewType = AVRoutePickerView
    
    func makeUIView(context: Context) -> AVRoutePickerView {
        let view = AVRoutePickerView()
        return view
    }
    
    func updateUIView(_ uiView: AVRoutePickerView, context: Context) {
    }
}

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设置音频类别试试？AVAudioSession.sharedInstance（）.setCategory（.playback）