如何使用AVAudioRecorder恢复录制？

Question

我在写一个使用AVAudioRecorder类的应用程序。它的工作原理，除了当一个电话进来很棒。我处理这个每周使用AVAudioRecorderDelegate方法

– (void) audioRecorderBeginInterruption: 
– (void) audioRecorderEndInterruption: 

直到中断结束它的伟大工程的苹果的指导方针和我通过调用试图“恢复”的录制再次记录方法（根据文档）。然而，它不会恢复我的录音，而是抛出旧录音，并开始一个全新的录音。我一直无法找到解决这个问题的方法，如果有人想到了这个问题，或者它是一个苹果公司的问题，请告诉我。我真的希望我不必使用AudioQueues来写这个。

感谢

Answer 1

尝试看起来与苹果的API中的错误。很有趣....

这是我们从支持票上收到的回复。 “

”你描述的行为是一个错误，不幸的是API中没有任何东西可以改变，以便实际附加到原始记录中，中断只会捕获中断后记录的音频。尝试在中断后停止录制，然后创建一个新文件，然后至少不会导致用户丢失任何信息，但结果将是两个单独的文件。当iOS工程师评估修复的关键特性时，由外部开发人员提交的错误至关重要，它很容易重现，但如果你有一个测试应用程序，你可以包括请做，iOS工程师喜欢让应用程序显示bug irectly。 “

Answer 2

您将使用这段代码

-(IBAction)pauseandplay:(id)sender 
{ 
    BOOL status= [player isPlaying]; 
    if(status) 
    { 
    [pauseplay setImage:[UIImage imageNamed:@"play.png"]]; 
    [player pause]; 
    } 
    else 
    { 
    [pauseplay setImage:[UIImage imageNamed:@"icon-pause.png"]]; 
    [player play]; 
    updateTimer = [NSTimer scheduledTimerWithTimeInterval:.01 target:self selector:@selector(updateCurrentTime) userInfo:player repeats:YES]; 
    } 
} 

Answer 3

我的解决办法是：在临时文件

手表AVAudioSessionInterruptionNotificatio

在AVAudioSessionInterruptionTypeBegan

1. 开始记录 - 停止记录

2. 在AVAudioSessionInterruptionTypeEnded - 开始新的记录。 。
3. 当用户停止时 - Marge文件。

Full Code

 [[NSNotificationCenter defaultCenter] addObserver:self 
             selector:@selector(audioSessionInterruptionNotification:) 
              name:AVAudioSessionInterruptionNotification 
              object:audioSession]; 



    -(void)audioSessionInterruptionNotification:(NSNotification*)notification { 
    NSString* seccReason = @""; 
    //Check the type of notification, especially if you are sending multiple AVAudioSession events here 
    NSLog(@"Interruption notification name %@", notification.name); 
    NSError *err = noErr; 
    if ([notification.name isEqualToString:AVAudioSessionInterruptionNotification]) { 
    seccReason = @"Interruption notification received"; 

    //Check to see if it was a Begin interruption 
    if ([[notification.userInfo valueForKey:AVAudioSessionInterruptionTypeKey] isEqualToNumber:[NSNumber numberWithInt:AVAudioSessionInterruptionTypeBegan]]) { 
     seccReason = @"Interruption began"; 
     NSLog(@"Interruption notification name %@ audio pause", notification.name); 

     dispatch_time_t restartTime = dispatch_time(DISPATCH_TIME_NOW, 
                0.01 * NSEC_PER_SEC); 
     dispatch_after(restartTime, dispatch_get_global_queue(0, 0), ^{ 
      AVAudioRecorder *recorder = [[self recorderPool] objectForKey:lastRecID]; 
      if (recorder) { 
       if(recorder.isRecording) { 
        [recorder stop]; 
        NSLog(@"Interruption notification name Pauseing recording %@", lastRecID); 
       } else { 
        NSLog(@"Interruption notification name Already Paused %@", lastRecID); 
       } 
      }else { 
       NSLog(@"Interruption notification name recording %@ not found", lastRecID); 
      } 
       NSLog(@"Interruption notification Pauseing recording status %d",recorder.isRecording); 
     }); 

    } else if([[notification.userInfo valueForKey:AVAudioSessionInterruptionTypeKey] isEqualToNumber:[NSNumber numberWithInt:AVAudioSessionInterruptionTypeEnded]]){ 
     seccReason = @"Interruption ended!"; 
     NSLog(@"Interruption notification name %@ audio resume", notification.name); 
     //Start New Recording 
     dispatch_time_t restartTime = dispatch_time(DISPATCH_TIME_NOW, 
                0.1 * NSEC_PER_SEC); 
     dispatch_after(restartTime, dispatch_get_global_queue(0, 0), ^{ 
      AVAudioRecorder *recorder = [[self recorderPool] objectForKey:lastRecID]; 
      NSLog(@"Interruption notification Resumeing recording status %d",recorder.isRecording); 
      if (recorder) { 
       if(!recorder.isRecording) { 
        NSString *filePath = [[self orgFileNames] objectForKey:lastRecID]; 
        NSArray * fileNames =[[self fileNames] objectForKey:lastRecID]; 
        NSString *tmpFileName = [self gnrTempFileName:filePath AndNumber:fileNames.count]; 
        [[[self fileNames] objectForKey:lastRecID] addObject:tmpFileName]; 
        NSURL *url = [NSURL fileURLWithPath:tmpFileName]; 
        NSError *error = nil; 
        recorder = [[AVAudioRecorder alloc] initWithURL:url settings:recordSetting error:&error]; 
        if (![recorder record]) { 
         NSLog(@"Interruption notification Error Resumeing recording %@",tempRecorder); 
         return; 
        } 
        [[self recorderPool] setObject:recorder forKey:lastRecID]; 
        NSLog(@"Interruption notification nameResumeing recording %@",lastRecID); 
       }else { 
        NSLog(@"Interruption notification Already Recording %d",recorder.isRecording); 
       } 
      }else { 
       NSLog(@"Interruption notification name recording %@ not found",lastRecID); 
      } 
     }); 
     } 
    } 
    }