1.录音
#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>
@interface ViewController ()
/** 录音的对象 */
@property (nonatomic, strong) AVAudioRecorder *recoder;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
}
- (IBAction)startRecord:(id)sender {
// 4.开始录音
[self.recoder record];
}
- (IBAction)stopRcord:(id)sender {
[self.recoder stop];
}
#pragma mark - 懒加载代码
- (AVAudioRecorder *)recoder
{
if (_recoder == nil) {
// 1.创建存放录音文件的地址
NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
NSString *filePath = [path stringByAppendingPathComponent:@"321.caf"];
NSURL *url = [NSURL URLWithString:filePath];
// 2.创建录音对象
self.recoder = [[AVAudioRecorder alloc] initWithURL:url settings:nil error:nil];
// 3.准备录音
[self.recoder prepareToRecord];
}
return _recoder;
}
@end
2.设置录制音频的质量
// 创建录音配置信息的字典
NSMutableDictionary *setting = [NSMutableDictionary dictionary];
// 音频格式
setting[AVFormatIDKey] = @(kAudioFormatAppleIMA4);
// 录音采样率(Hz) 如：AVSampleRateKey==8000/44100/96000（影响音频的质量）
setting[AVSampleRateKey] = @(8000.0);
// 音频通道数 1 或 2
setting[AVNumberOfChannelsKey] = @(1);
// 线性音频的位深度 8、16、24、32
setting[AVLinearPCMBitDepthKey] = @(8);
//录音的质量
setting[AVEncoderAudioQualityKey] = [NSNumber numberWithInt:AVAudioQualityHigh];
