ios - 将AVAudioPlayer设置为AVAudioSession的输入数据源

Question

我想知道是否可以将AVAudioPlayer指定为AVAudioSession的输入设备。我想通过麦克风通过VoIP应用程序播放声音，让另一方听到，即使可能，我也不知道该如何处理。

感谢任何帮助，文档模糊不清，我知道这不是洁净编程，谢谢。

Answer 1

不，如果您进入AVAudioSession.h头文件(或Apple文档)，您将看到可用的输入/输出端口列表。除此之外，Apple不想让您有能力从其他应用程序中窃取音乐>)

    #pragma mark -- constants for port types --

/* input port types */
AVF_EXPORT NSString *const AVAudioSessionPortLineIn       NS_AVAILABLE_IOS(6_0); /* Line level input on a dock connector */
AVF_EXPORT NSString *const AVAudioSessionPortBuiltInMic   NS_AVAILABLE_IOS(6_0); /* Built-in microphone on an iOS device */
AVF_EXPORT NSString *const AVAudioSessionPortHeadsetMic   NS_AVAILABLE_IOS(6_0); /* Microphone on a wired headset.  Headset refers to an
                                                                                   accessory that has headphone outputs paired with a
                                                                                   microphone. */
/* output port types */
AVF_EXPORT NSString *const AVAudioSessionPortLineOut          NS_AVAILABLE_IOS(6_0); /* Line level output on a dock connector */
AVF_EXPORT NSString *const AVAudioSessionPortHeadphones       NS_AVAILABLE_IOS(6_0); /* Headphone or headset output */
AVF_EXPORT NSString *const AVAudioSessionPortBluetoothA2DP    NS_AVAILABLE_IOS(6_0); /* Output on a Bluetooth A2DP device */
AVF_EXPORT NSString *const AVAudioSessionPortBuiltInReceiver  NS_AVAILABLE_IOS(6_0); /* The speaker you hold to your ear when on a phone call */
AVF_EXPORT NSString *const AVAudioSessionPortBuiltInSpeaker   NS_AVAILABLE_IOS(6_0); /* Built-in speaker on an iOS device */
AVF_EXPORT NSString *const AVAudioSessionPortHDMI             NS_AVAILABLE_IOS(6_0); /* Output via High-Definition Multimedia Interface */
AVF_EXPORT NSString *const AVAudioSessionPortAirPlay          NS_AVAILABLE_IOS(6_0); /* Output on a remote Air Play device */
AVF_EXPORT NSString *const AVAudioSessionPortBluetoothLE      NS_AVAILABLE_IOS(7_0); /* Output on a Bluetooth Low Energy device */

/* port types that refer to either input or output */
AVF_EXPORT NSString *const AVAudioSessionPortBluetoothHFP NS_AVAILABLE_IOS(6_0); /* Input or output on a Bluetooth Hands-Free Profile device */
AVF_EXPORT NSString *const AVAudioSessionPortUSBAudio     NS_AVAILABLE_IOS(6_0); /* Input or output on a Universal Serial Bus device */
AVF_EXPORT NSString *const AVAudioSessionPortCarAudio     NS_AVAILABLE_IOS(7_0); /* Input or output via Car Audio */