Question

我正在编写一个使用AVAudioRecorder类的应用程序。除了拨打电话时，它的效果很好。我按照苹果使用AVAudioRecorderDelegate方法的指导原则来处理这个问题

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

在中断结束之前它很有效，我试图通过再次调用记录方法来“恢复”记录（根据文档）。然而，它并没有恢复我的录音，而是抛弃旧的录音，并在它的位置启动一个全新的录音。我无法找到解决这个问题的方法，如果有人想出这个问题，或者如果它是苹果公司AVAudioRecorder的错误，请告诉我。我真的希望我不必使用AudioQueues来写这个。

感谢

Answer 1

看起来它是苹果API的一个错误。非常有趣....

这是我们从支持票中收到的回复。

“您描述的行为是一个错误，很遗憾，API中没有任何内容可以更改为实际附加到原始录制内容。中断导致仅捕获中断后录制的音频。您可以尝试并在中断后停止录制，然后创建一个新文件，之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。

请为此问题提交错误报告，因为当iOS工程师正在评估要解决的修复程序的关键功能时，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，如有直接显示错误的应用程序。 “

Answer 2

我的解决方案是：

在临时文件上开始记录
关注AVAudioSessionInterruptionNotificatio
在AVAudioSessionInterruptionTypeBegan上 - 停止录制。
在AVAudioSessionInterruptionTypeEnded上 - 开始新录制。
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);
            }
        });
      }
     } 
    }

Answer 3

您将尝试使用这段代码

-(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];
    }
}

如何使用AVAudioRecorder恢复录制？

3 个答案: