使用IOS自带API实现录音功能_稻草人_新浪博客

1、添加录音按钮(一直按着录音,松手之后录音结束,结束播放录音)

    UIButton *speakBut = [UIButton buttonWithType:UIButtonTypeCustom];
    speakBut.frame = CGRectMake(60, 340, 200, 40);
    [speakBut setBackgroundImage:[UIImage imageNamed:@"btn_orange" cache:NO] forState:UIControlStateNormal];
    [speakBut setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [speakBut addTarget:self action:@selector(btnDown:) forControlEvents:UIControlEventTouchDown];
    [speakBut addTarget:self action:@selector(pressToSpeak:) forControlEvents:UIControlEventTouchUpInside];
    [speakBut setTitle:@"按住说话" forState:UIControlStateNormal];
    [speakBut setTitle:@"正在录音" forState:UIControlStateHighlighted];
    speakBut.titleLabel.font = [UIFont boldSystemFontOfSize:25];
    [mainView addSubview:speakBut];

//录音文件保存路径
    NSString *recordUrl = NSTemporaryDirectory();//[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    recordUrl = [recordUrl stringByAppendingPathComponent:@"sound.aac"];

    //录音设置
    NSMutableDictionary *recordSetting = [[[NSMutableDictionary alloc]init] autorelease];
    //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];
   
    avRecorder = [[AVAudioRecorder alloc] initWithURL:[NSURL URLWithString:recordUrl] settings:recordSetting error:nil];
    avRecorder.delegate = self;

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

//按钮按下方法
- (void)btnDown:(id)sender
{
    [avRecorder prepareToRecord];
    [avRecorder record];
}

//按钮点击方法
- (void)pressToSpeak:(id)sender{
    double cTime = avRecorder.currentTime;
    //NSLog(@"sss---->%f",cTime);
    if (cTime > 2) {//如果录制时间<2 不发送
        NSLog(@"发出去");//可以将音频文件发送后台
    }else {
        //删除记录的文件
        [avRecorder deleteRecording];
        //删除存储的
    }
    [avRecorder stop];
}

//录制结束的代理方法
- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag{
    [avSession setActive:NO error:nil];
    NSString *recordUrl = NSTemporaryDirectory();//[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
    recordUrl = [recordUrl stringByAppendingPathComponent:@"sound.aac"];
    AVAudioPlayer *player = [[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL URLWithString:recordUrl] error:nil];
    [player play];
}