在iOS7及更高版本的接收器和揚聲器之間切換音頻輸出？

我有一個音頻播放器，當接近傳感器通知1時，可以選擇將音頻輸出從揚聲器切換到接收器/聽筒（不管耳機是否連接）。以下是我的代碼。在iOS7及更高版本的接收器和揚聲器之間切換音頻輸出？

- (void) switchAudioOutput:(NSString*)output{ 
    AVAudioSession* audioSession = [AVAudioSession sharedInstance]; 
    BOOL success; 
    NSError* error; 

    if([output isEqualToString:keAudioOutputReciever]){ 
     //Force current audio out through reciever 
     //set the audioSession override 
     success = [audioSession overrideOutputAudioPort:AVAudioSessionPortOverrideNone 
              error:&error]; 
     if (!success) 
      NSLog(@"AVAudioSession error overrideOutputAudioPort:%@",error); 

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

    }else if([output isEqualToString:keAudioOutputSpeaker]){ 
     //set the audioSession override 
     success = [audioSession overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker 
                error:&error]; 
     if (!success) 
      NSLog(@"AVAudioSession error overrideOutputAudioPort:%@",error); 

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

    } 
}

這是基於答案Toggle Button route audio to speaker and receiver和enter link description here。我注意到這隻會強制單獨使用音頻至揚聲器，但不能確保路由僅通過接收器。此外，同時轉移到揚聲器我收到以下錯誤：

AVAudioSession error overrideOutputAudioPort:Error Domain=NSOSStatusErrorDomain Code=-50 "The operation couldn’t be completed. (OSStatus error -50.)"

來源

2014-10-01 Edwin Abraham

我也歌廳完全相同的錯誤想出了答案。有人設法解決這個問題嗎？ – 2015-01-26 08:50:33

我避免覆蓋了接收機

- (void) setAudioSession:(NSString*)audioOutput{ 

     NSError* error; 
     if([audioOutput isEqualToString:audioOutputSpeaker.lowercaseString]){ 

      //set the audioSession override 
      if(![self setCategory:AVAudioSessionCategoryPlayAndRecord 
           withOptions:AVAudioSessionCategoryOptionDefaultToSpeaker|AVAudioSessionCategoryOptionAllowBluetooth 
            error:&error]) 
       NSLog(@"AVAudioSession error AVAudioSessionCategoryPlayAndRecord:%@",error); 

      //activate the audio session 
      if (![self setActive:YES error:&error]) 
       NSLog(@"AVAudioSession error activating: %@",error); 
      else 
       NSLog(@"AVAudioSession active with override: AVAudioSessionPortOverrideNone"); 
     }else if ([audioOutput isEqualToString:audioOutputReciever.lowercaseString]){ 
      //Force current audio out through reciever 
      //set the audioSession override 
      if(![self setCategory:AVAudioSessionCategoryPlayAndRecord 
           withOptions:AVAudioSessionCategoryOptionAllowBluetooth 
            error:&error]) 
       NSLog(@"AVAudioSession error AVAudioSessionCategoryPlayAndRecord:%@",error); 

      if (![self overrideOutputAudioPort:AVAudioSessionPortOverrideNone error:&error]) 
       NSLog(@"AVAudioSession error overrideOutputAudioPort to Reciever:%@",error); 

      //activate the audio session 
      if (![self setActive:YES error:&error]) 
       NSLog(@"AVAudioSession error activating: %@",error); 
      else 
       NSLog(@"AVAudioSession active with override: AVAudioSessionPortOverrideNone"); 
     } 
    }

來源

2015-02-10 13:28:57

在iOS7及更高版本的接收器和揚聲器之間切換音頻輸出？

回答

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