創(chuàng)建錄音對(duì)象

 // 1.創(chuàng)建沙盒路徑
 NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
        
 // 2.拼接音頻文件
 NSString *filePath = [path stringByAppendingPathComponent:@"錄音文件.caf"];
        
 // 3.轉(zhuǎn)化成url file://
 NSURL *url = [NSURL fileURLWithPath:filePath];
        
 // 4.設(shè)置錄音的參數(shù)
 NSDictionary *settingRecorder = @{
                                   AVEncoderAudioQualityKey : [NSNumber numberWithInteger:AVAudioQualityLow],
                                   AVEncoderBitRateKey : [NSNumber numberWithInteger:16],
                                   AVSampleRateKey : [NSNumber numberWithFloat:8000],
                                   AVNumberOfChannelsKey : [NSNumber numberWithInteger:2]
                                   };
        
        
  // 5.創(chuàng)建錄音對(duì)象
  self.recorder = [[AVAudioRecorder alloc] initWithURL:url settings:settingRecorder error:nil];

開(kāi)始錄音

[self.recorder record];

結(jié)束錄音

[self.recorder stop];