1,初始化 AVAudioSession
//7.0第一次运行会提示,是否允许使用麦克风
AVAudioSession *session = [AVAudioSessionsharedInstance];
NSError *sessionError;
//AVAudioSessionCategoryPlayAndRecord用于录音和播放
[session setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError];
if(session == nil)
NSLog(@"Error creating session: %@", [sessionError description]);
else
[session setActive:YES error:nil];
2,生成目录
NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
playName = [NSString stringWithFormat:@"%@/play.aac",docDir];
3,录制
recorder = [[AVAudioRecorderalloc] initWithURL:[NSURLURLWithString:playName] settings:recorderSettingsDicterror:&error];
if (recorder) {
recorder.meteringEnabled = YES;
[recorder prepareToRecord];
[recorder record];
4,播放
player = [[AVAudioPlayeralloc] initWithContentsOfURL:[NSURLURLWithString:playName] error:&playerError];
if (player == nil)
{
NSLog(@"ERror creating player: %@", [playerError description]);
}else{
[player play];
}
ps:好像AVAudioSession 与AVAudioRecorder, AVAudioPlayer没有什么关系,代码之间看不到,
a,设置:
//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];
//要找的文件路径
NSString *strUrl =
[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)
lastObject];
//创建存储的文件夹
NSURL *url = [NSURL fileURLWithPath:[NSString
stringWithFormat:@"%@/lll.aac", strUrl]];
urlPlay =
url;//获得播放路径
NSLog(@"录音的路径为:%@",strUrl);
NSLog(@"录音====路径:%@",url);
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;
b,启动,时间限制,
- (IBAction)btnDown:(id)sender
{
//创建录音文件,准备录音
if ([recorder
prepareToRecord]) {
//开始
[recorder record];
}
//设置定时检测
timer = [NSTimer scheduledTimerWithTimeInterval:0 target:self
selector:@selector(detectionVoice) userInfo:nil repeats:YES];
}
- (IBAction)btnUp:(id)sender
{
double cTime =
recorder.currentTime;
if
(cTime > 2) {//如果录制时间<2 不发送
[mainRecorder recordForDuration:60.0];//设置录音时限60秒,该方法自动执行prepareToRecord
NSLog(@"发出去");
}else {
//删除记录的文件
[recorder
deleteRecording];
//删除存储的
}
[recorder stop];
[timer
invalidate];//移除计时器
}
- (IBAction)btnDragUp:(id)sender
{
//删除录制文件
[recorder deleteRecording];
[recorder stop];
[timer
invalidate];
NSLog(@"取消发送");
}