IOS AVAudioRecorder 录制音频

来源：互联网发布：java多态编辑：程序博客网时间：2024/06/12 20:47

AVAudioRecorder 在真机上录制不了声音，但在模拟器上是可以录音的。

解决办法：

AVAudioSession *session = [AVAudioSessionsharedInstance];

NSError *setCategoryError =nil;

[session setCategory:AVAudioSessionCategoryPlayAndRecorderror:&setCategoryError];

在初始化AVAudioRecorder时加一下。

然后播放的时候声音很小。

解决办法：

AVAudioSession *session = [AVAudioSession sharedInstance];

NSError *setCategoryError = nil;

[session setCategory:AVAudioSessionCategoryPlayAndRecord error:&setCategoryError];

在播放前加一下。

- (void)initRecorder {    //录音设置    NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc]init];    //设置录音格式  AVFormatIDKey==kAudioFormatLinearPCM    [recordSetting setValue:[NSNumber numberWithInt:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey];    //设置录音采样率(Hz) 如：AVSampleRateKey==8000/44100/96000（影响音频的质量）    [recordSetting setValue:[NSNumber numberWithFloat:44100] forKey:AVSampleRateKey];    //录音通道数  1 或 2    [recordSetting setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey];    //线性采样位数  8、16、24、32    [recordSetting setValue:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];    //录音的质量    [recordSetting setValue:[NSNumber numberWithInt:AVAudioQualityHigh] forKey:AVEncoderAudioQualityKey];        NSString *strUrl = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];    NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/test.aac", strUrl]];    AVAudioSession *session = [AVAudioSession sharedInstance];    NSError *setCategoryError = nil;    [session setCategory:AVAudioSessionCategoryPlayAndRecord error:&setCategoryError];        if(setCategoryError){        NSLog(@"%@", [setCategoryError description]);    }        NSError *error;    //初始化    recorder = [[AVAudioRecorder alloc]initWithURL:url settings:recordSetting error:&error];    //开启音量检测    recorder.meteringEnabled = YES;    recorder.delegate = self;}

- (void)startRecorder {    if (recorder == nil) {        [self initRecorder];    }    //创建录音文件，准备录音    if ([recorder prepareToRecord]) {        //开始        [recorder record];    }}- (void)pauseRecorder {    [recorder pause];    [timer invalidate];}- (void)stopRecorder {    [recorder stop];    [timer invalidate];}

0 0