关于AVAudioRecorder录音失败的问题

HAOYUE
  • 144
- (void)viewDidLoad {
    [super viewDidLoad];
    NSArray *dirPath=NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES);
    NSString *docPath=[dirPath objectAtIndex:0];
    NSString *filePath=[docPath stringByAppendingPathComponent:@"test1.wav"];
    _url=[NSURL URLWithString:filePath];

    NSDictionary *recordSettings=[NSDictionary dictionaryWithObjectsAndKeys:
          [NSNumber numberWithInt:AVAudioQualityMin],
          AVEncoderAudioQualityKey,
          [NSNumber numberWithInt:16],
          AVEncoderBitRateKey,
          [NSNumber numberWithInt:2],
          AVNumberOfChannelsKey,
          [NSNumber numberWithFloat:44100.0],
          AVSampleRateKey,
          nil];
    NSError *error;
    //AVAudioRecorder *recorder;
    //AVAudioPlayer *player;

    _player=[[AVAudioPlayer alloc] initWithContentsOfURL:_url error:&error];
    _recorder=[[AVAudioRecorder alloc] initWithURL:_url settings:recordSettings error:nil];
    if (error) {
        NSLog(@"%@",[error localizedDescription]);
    }else{
        [_recorder prepareToRecord];
    }
}

调试的时候显示_player的值为nil,还有报错: The operation couldn’t be completed. (OSStatus error 2003334207.)我没在网上找到答案。

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2 个回答

_player的值为nil,这个应该是Xcode的BUG导致的,你如果用NSLog输出,_player应该是有值的。

  1. 记得给AVAudioRecorder设置代理
  2. iOS7及以上版本,增加了对录音功能的权限控制。你需要先判断应用程序有没有录音权限,如果应用程序不具备录音权限,提示用户打开。
    ,判断方法:
objectivec/// 新增API,获取录音权限. 返回值,YES为无拒绝,NO为拒绝录音.
+ (BOOL)canRecord
{
    __block BOOL bCanRecord = YES;
    if ([[[UIDevice currentDevice]systemVersion]floatValue] >= 7.0) {
        AVAudioSession *audioSession = [AVAudioSession sharedInstance];
        if ([audioSession respondsToSelector:@selector(requestRecordPermission:)]) {
            [audioSession performSelector:@selector(requestRecordPermission:) withObject:^(BOOL granted) {
                if (granted) {
                    bCanRecord = YES;
                } else {
                    bCanRecord = NO;
                }
            }];
        }
    }
    return bCanRecord;
}
  1. 以下代码让设备开启录音模式:
objectivecAVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];
[audioSession setActive:YES error:nil];
will_lin
  • 1
新手上路,请多包涵

楼主,解决了嘛?我也遇到同样问题,估计是转wav格式出错了

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