如何音频重定向到AppRTC iOS的例子音箱？ [英] How to redirect audio to speakers in the AppRTC iOS example?

问题描述

我想音频重定向到音箱在的 AppRTC iOS的例子。

I'm trying to redirect audio to speakers in the AppRTC iOS example.

我试过：

AVAudioSession* session = [AVAudioSession sharedInstance];

//error handling
BOOL success;
NSError* error;

//set the audioSession category. 
//Needs to be Record or PlayAndRecord to use audioRouteOverride:  

success = [session setCategory:AVAudioSessionCategoryPlayAndRecord
                         error:&error];

if (!success)  NSLog(@"AVAudioSession error setting category:%@",error);

//set the audioSession override
success = [session overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker
                                      error:&error];
if (!success)  NSLog(@"AVAudioSession error overrideOutputAudioPort:%@",error);

//activate the audio session
success = [session setActive:YES error:&error];
if (!success) NSLog(@"AVAudioSession error activating: %@",error);
else NSLog(@"audioSession active");

有任何错误，但它不工作。我该如何解决这个问题？

There are no errors, but it doesn't work. How can I fix this?

推荐答案

我的解决方案，解决它。
只听AVAudioSessionRouteChangeNotification

I solved it by the solution. Just listen AVAudioSessionRouteChangeNotification

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didSessionRouteChange:) name:AVAudioSessionRouteChangeNotification object:nil];

和使用如下didSessionRouteChange选择：

And using the didSessionRouteChange selector as below:

- (void)didSessionRouteChange:(NSNotification *)notification
{
  NSDictionary *interuptionDict = notification.userInfo;
  NSInteger routeChangeReason = [[interuptionDict valueForKey:AVAudioSessionRouteChangeReasonKey] integerValue];

  switch (routeChangeReason) {
      case AVAudioSessionRouteChangeReasonCategoryChange: {
          // Set speaker as default route
          NSError* error;
          [[AVAudioSession sharedInstance] overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker error:&error];
      }
      break;

    default:
      break;
  }
}

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