应答来电时，音频似乎不适用于 CallKit

Question

我将我的应用程序与CallKit集成，以便使用 VoIP 接收来自其他用户的来电。现在我遇到了一些音频问题，在接听电话时无法激活。

我已经检查了本教程，并比较了ProviderDelegate非常相似。

这就是我的ProviderDelegate课的样子

class ProviderDelegate: NSObject {
// 1.
fileprivate let callKitManager: CallKitCallInit
fileprivate let provider: CXProvider
init(callKitManager: CallKitCallInit) {
    self.callKitManager = callKitManager
    // 2.
    provider = CXProvider(configuration: type(of: self).providerConfiguration)
    
    super.init()
    // 3.
    provider.setDelegate(self, queue: nil)
    
}
// 4.
static var providerConfiguration: CXProviderConfiguration {
    let providerConfiguration = CXProviderConfiguration(localizedName: "vKclub dev2")
    
    providerConfiguration.supportsVideo = false
    providerConfiguration.maximumCallsPerCallGroup = 1
    providerConfiguration.supportedHandleTypes = [.phoneNumber]
    return providerConfiguration
}
func reportIncomingCall(uuid: UUID, handle: String, hasVideo: Bool = false, completion: ((NSError?) -> Void)?) {
    // 1.
    print("This is UUID === ", uuid)
    configureAudioSession()
    let update = CXCallUpdate()
    update.remoteHandle = CXHandle(type: .phoneNumber, value: handle)
    update.hasVideo = hasVideo
    
    provider.reportNewIncomingCall(with: uuid, update: update) { error in
        
        
        if error == nil {
            
            self.configureAudioSession()
            let call = CallKitCallInit(uuid: uuid, handle: handle)
            self.callKitManager.add(call: call)
            lastCallUUID = uuid
            print("UUID === ", uuid)
        } else {
            
        }
        
       
        completion?(error as NSError?)
    }
    
    
}
}

这就是我设置AVAudioSession的方式

extension ProviderDelegate: CXProviderDelegate {
func providerDidReset(_ provider: CXProvider) {
    print("Stop Audio ==STOP-AUDIO==")
    
    for call in callKitManager.calls {
        call.end(uuid: UUID())
    }
    
    callKitManager.removeAllCalls()
}
func provider(_ provider: CXProvider, perform action: CXStartCallAction) {
    // 1.
    guard let call = callKitManager.callWithUUID(uuid: action.callUUID) else {
        action.fail()
        return
    }
    
    configureAudioSession()
    
}
func provider(_ provider: CXProvider, perform action: CXAnswerCallAction) {
    // 1.
    guard let call = callKitManager.callWithUUID(uuid: action.callUUID) else {
        action.fail()
        return
    }
    // 2.
    configureAudioSession()
    // 3.
    call.answer()
    // 4.
    if #available(iOS 11, *) {
        print ("vKclub")
    } else {
        
        action.fulfill()
    }
    
}
func provider(_ provider: CXProvider, perform action: CXEndCallAction) {
    // 1.
    guard let call = callKitManager.callWithUUID(uuid: action.callUUID) else {
        action.fail()       
        return
    }
    // 2.
    print("Stop audio ==STOP-AUDIO==")
    configureAudioSession()
    // 3.
    call.end(uuid: action.callUUID)
    // 4.
    if #available(iOS 11, *) {
        print("Our vKclube")
    } else {
        action.fulfill()
    }
    
    // 5.
    callKitManager.remove(call: call)
}
// 5.
func provider(_ provider: CXProvider, didActivate audioSession: AVAudioSession) {
    print("Starting audio ==STARTING-AUDIO==")
}

func provider(_ provider: CXProvider, didDeactivate audioSession: AVAudioSession) {
    print("Received (#function)")
}
func configureAudioSession() {
    let session = AVAudioSession.sharedInstance()
    do{
        try session.setCategory(AVAudioSessionCategoryPlayAndRecord,
                                 mode: AVAudioSessionModeVoiceChat,
                                 options: [])
    } catch {
        print("========== Error in setting category (error.localizedDescription)")
    }
    
    do {
        try session.setPreferredSampleRate(44100.0)
    } catch {
        print("======== Error setting rate (error.localizedDescription)")
    }
    do {
        try session.setPreferredIOBufferDuration(0.005)
    } catch {
        print("======== Error IOBufferDuration (error.localizedDescription)")
    }
    do {
        try session.setActive(true)
    } catch {
        print("========== Error starting session (error.localizedDescription)")
    }
}

}

我已经面对这个问题好几天了，但我仍然无法弄清楚。我正在使用XCode 10.1。

Answer 1

我发现错误是关于您的代码action.fulfill()永远不会被调用。

根据苹果的文件：

调用此方法会将 isComplete 属性值设置为 true。多次调用此方法或在调用 fail（） 方法后调用此方法不起作用。只应从 CXProviderDelegate 方法的实现中调用此方法。

我希望您应该在 CXProviderDelegate 中调用此方法。我已经看到你实现了它，但遗憾的是，该方法从未被调用过。我相信这就是您的音频未激活的原因。