#import <AVFoundation/AVFoundation.h>

@interface ViewController ()<AVAudioRecorderDelegate>
{
  AVAudioRecorder *audioRecorder;
}
@end

 UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
  button.frame = CGRectMake(100, 100, 100, 100);
  [button setTitle:@"TICK" forState:UIControlStateNormal];
  button.backgroundColor = [UIColor brownColor];
  [button addTarget:self action:@selector(startAudioRecoder:) forControlEvents:UIControlEventTouchUpInside];
  [self.view addSubview:button];

- (void)startAudioRecoder:(UIButton *)sender{
  sender.selected = !sender.selected;
  if (sender.selected != YES) {
    [audioRecorder stop];
    return;
  }
  
  //  URL是本地的URL AVAudioRecorder需要一个存储的路径
  NSString *name = [NSString stringWithFormat:@"%d.aiff",(int)[NSDate date].timeIntervalSince1970];
  
  NSString *path = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES).firstObject stringByAppendingPathComponent:name];
  NSError *error;
  //  录音机 初始化
  audioRecorder = [[AVAudioRecorder alloc]initWithURL:[NSURL fileURLWithPath:path] settings:@{AVNumberOfChannelsKey:@2,AVSampleRateKey:@44100,AVLinearPCMBitDepthKey:@32,AVEncoderAudioQualityKey:@(AVAudioQualityMax),AVEncoderBitRateKey:@128000} error:&error];
  [audioRecorder prepareToRecord];
  [audioRecorder record];
  audioRecorder.delegate = self;
  /*
   1.AVNumberOfChannelsKey 通道数 通常为双声道 值2
   2.AVSampleRateKey 采样率 单位HZ 通常设置成44100 也就是44.1k
   3.AVLinearPCMBitDepthKey 比特率 8 16 24 32
   4.AVEncoderAudioQualityKey 声音质量
       ① AVAudioQualityMin  = 0, 最小的质量
       ② AVAudioQualityLow  = 0x20, 比较低的质量
       ③ AVAudioQualityMedium = 0x40, 中间的质量
       ④ AVAudioQualityHigh  = 0x60,高的质量
       ⑤ AVAudioQualityMax  = 0x7F 最好的质量
   5.AVEncoderBitRateKey 音频编码的比特率 单位Kbps 传输的速率 一般设置128000 也就是128kbps
   
   */
  
  
  
  NSLog(@"%@",path);

}

- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag{
  NSLog(@"录音结束");
//  文件操作的类
 NSFileManager *manger = [NSFileManager defaultManager];

  NSString *path = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
//  获得当前文件的所有子文件subpathsAtPath
  NSArray *pathlList = [manger subpathsAtPath:path];

//  需要只获得录音文件
  NSMutableArray *audioPathList = [NSMutableArray array];
//  遍历所有这个文件夹下的子文件
  for (NSString *audioPath in pathlList) {
//    通过对比文件的延展名（扩展名 尾缀） 来区分是不是录音文件
    if ([audioPath.pathExtension isEqualToString:@"aiff"]) {
//      把筛选出来的文件放到数组中
      [audioPathList addObject:audioPath];
    }
  }
  
  NSLog(@"%@",audioPathList);
  
}