您需要使用 AVCaptureSessionWasInterruptedNotification 和 AVCaptureSessionInterruptionEndedNotification 回调并在会话中断时断开音频捕获：

You need to use the AVCaptureSessionWasInterruptedNotification and AVCaptureSessionInterruptionEndedNotification callbacks and disconnect the audio capture while the session is interrupted:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sessionWasInterrupted:) name:AVCaptureSessionWasInterruptedNotification object:self.session];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(sessionInterruptionEnded:) name:AVCaptureSessionInterruptionEndedNotification object:self.session];
// note that self.session is an AVCaptureSession

-

- (void)sessionWasInterrupted:(NSNotification *)notification {
  NSLog(@"session was interrupted");

  AVCaptureDevice *device = [[self audioInput] device];
  if ([device hasMediaType:AVMediaTypeAudio]) {
    [[self session] removeInput:[self audioInput]];
    [self setAudioInput:nil];
  }
}

- (void)sessionInterruptionEnded:(NSNotification *)notification {
  NSLog(@"session interuption ended");
}
// note that [self audioInput] is a getter for an AVCaptureDeviceInput

这将允许相机继续运行并允许它捕捉静止/静音视频

This will allow the camera to continue running and allows it to capture stills / silent video

现在关于如何在通话结束后重新连接音频..让我知道你是否弄明白，从iOS 10开始看似乎不可能：回电时电话结束了吗？ （恢复AVCaptureSession）

Now as for how to reconnect the audio after the call ends.. let me know if you figure it out, seemed impossible as of iOS 10: Callback when phone call ends? (to resume AVCaptureSession)