錄音在iOS7通過AudioQueueStart功能

Question

我的代碼工作正常在iOS6的但不是在iOS的7，請指導

UInt32 enableMetering = 0; 
    status = AudioQueueSetProperty(recordState.queue, kAudioQueueProperty_EnableLevelMetering, &enableMetering,sizeof(enableMetering)); 
    if (status) {fprintf(stderr, "Could not enable metering\n"); return NO;} 

// this line giving error 
**status = AudioQueueStart(recordState.queue, NULL);** 
    if (status) {fprintf(stderr, "Could not start Audio Queue\n"); return NO;} 
recordState.currentPacket = 0; 
recordState.recording = YES; 
return YES; 

錯誤是

Could not start Audio Queue 
Error starting recording 

請指導...

Answer 1

@Kalaichelvan'scomment是perfect。

我在iOS 7.1面臨類似的問題。添加以下在AppDelegate's didFinishLaunchingWithOptions：

AVAudioSession * audioSession = [AVAudioSession sharedInstance]; 
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error: nil]; 
[audioSession setActive:YES error: nil]; 

編輯：上面的代碼是爲我工作