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我正在将新的 CallKit API 与我的 VOIP 应用程序集成。

如示例应用程序所示：https ://developer.apple.com/library/content/samplecode/Speakerbox/Introduction/Intro.html

我正在配置音频会话：

- (void) configureAudioSession
{
    // Configure the audio session
    AVAudioSession *sessionInstance = [AVAudioSession sharedInstance];

    // we are going to play and record so we pick that category
    NSError *error = nil;
    [sessionInstance setCategory:AVAudioSessionCategoryPlayAndRecord error:&error];
    if (error) {
        NSLog(@"error setting audio category %@",error);
    }

    // set the mode to voice chat
    [sessionInstance setMode:AVAudioSessionModeVoiceChat error:&error];
    if (error) {
        NSLog(@"error setting audio mode %@",error);
    }

    NSLog(@"setupAudioSession");

    return;
}

在我的 CXAnswerCallAction 中：

  func provider(_ provider: CXProvider, perform action: CXAnswerCallAction) {
        print("Provider - CXAnswerCallAction")

        // get the active call
        guard let call = self.softphone.getCallForCallId(self.currentCallId) else {
            action.fail()
            return
        }

        /*
         Configure the audio session, but do not start call audio here, since it must be done once
         the audio session has been activated by the system after having its priority elevated.
         */
        self.softphone.configureAudioSession()

        // Trigger the call to be answered via the underlying network service.
        call.answer()

        // Signal to the system that the action has been successfully performed.
        action.fulfill()
    }

根据文档，didActivate 应该由 callkit 回调：

func provider(_ provider: CXProvider, didActivate audioSession: AVAudioSession) {
    print("Provider - Received \(#function)")

    // Start call audio media, now that the audio session has been activated after having its priority boosted.
}

由于某些原因，在第一次 VOIP 呼叫后它不会被回调。随后的调用似乎收到了回调，并且工作正常。

如何解决这个问题？

4

1 回答 1

2

我通过先设置通话音频然后调用“reportNewIncomingCall”方法解决了这个问题。示例代码如下：

func reportIncomingCall(uuid: UUID, handle: String, hasVideo: Bool = false, completion: ((NSError?) -> Void)? = nil) {
    let update = CXCallUpdate()
    update.remoteHandle = CXHandle(type: .phoneNumber, value: handle)
    update.hasVideo = hasVideo


    DispatchQueue.global().sync {
        _ = try? AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayAndRecord, with: AVAudioSessionCategoryOptions.mixWithOthers)
        _ = try? AVAudioSession.sharedInstance().overrideOutputAudioPort(AVAudioSessionPortOverride.none)
        if hasVideo == true {
            _ = try? AVAudioSession.sharedInstance().setMode(AVAudioSessionModeVideoChat)
        } else {
            _ = try? AVAudioSession.sharedInstance().setMode(AVAudioSessionModeVoiceChat)
        }


        do {
            _ = try AVAudioSession.sharedInstance().setActive(true)
        } catch (let error){
            print("audio session error: \(error)")
        }
    }

    provider.reportNewIncomingCall(with: uuid, update: update) { error in

        if error == nil {

        }

        completion?(error as? NSError)
    }
}
于 2017-03-21T10:16:52.917 回答