AVAudioSessionInterruptionNotification不会触发时捕获设备活跃 [英] AVAudioSessionInterruptionNotification not triggered when capture device active

问题描述

我在iOS 7.0.4有一个问题的 AVAudioSessionInterruptionNotification 。结果
我注册了它的NSNotificationCenter，我激活AVAudioSession。
一切工作正常，但如果摄像机被激活，该特定通知不再被触发，既不中断的开始，也不是结束吧。结果
我通过接收上iPhone4的电池通话，也可以通过该应用程序正在运行，同时使报警环测试音频中断。
我使用的AVCam通知还试图示例应用程序和我有同样的问题。结果
什么是音频中断和激活相机之间的关系？为什么会在摄像机开启停止被触发音频中断？难道这是一个iOS的错误？

I'm having a problem with "AVAudioSessionInterruptionNotification" on iOS 7.0.4.
I sign up for it on the NSNotificationCenter, and I activate AVAudioSession. Everything works fine, but if a camera is activated, that particular notification is not triggered anymore, neither for the beginning of an interruption, nor for the end of it.
I test audio interruptions by receiving cell calls on an iPhone4, and also by making an alarm ring while the app is running. I also tried using the notification with the "AVCam" sample app, and I have the same problem.
What is the relationship between audio interruptions and camera activation? Why would audio interruptions stop being triggered if a camera is turned on? Could this be an iOS bug?

编辑2014年1月10日：我更新到iOS 7.1的Beta 3，这个问题仍是present

Edit jan 10, 2014: I updated to iOS 7.1 beta 3, and the problem is still present.

感谢您。

推荐答案

设置相机/捕获设备对象的属性usesApplicationAudioSession为NO，一切都会好起来。

set the camera/capture device object property usesApplicationAudioSession to NO and all will be fine

您可以使用AVCaptureSession：

You can use AVCaptureSession:

captureSession = [[AVCaptureSession alloc] init];
...
captureSession.usesApplicationAudioSession = NO;

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