录音
//
// ViewController.m
// 录音
//
// Created by 谢泽锋 on 2017/3/6.
// Copyright © 2017年 xiezefeng. All rights reserved.
//
#define RecordFile [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"tempRecord.data"]
#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>
@interface ViewController ()<AVAudioRecorderDelegate>
@property(strong, nonatomic)AVPlayerItem * palyItem;
@property(strong, nonatomic)AVPlayer * player;
/*** 录音对象 */
@property (nonatomic, strong) AVAudioRecorder *recorder;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
}
- (IBAction)start:(id)sender {
[self startRecorder];
}
/**
* 设置录音一些属性
*/
- (NSDictionary *)recordingSettings
{
NSMutableDictionary *recordSetting =[NSMutableDictionary dictionaryWithCapacity:10];
// 音频格式
recordSetting[AVFormatIDKey] = @(kAudioFormatMPEG4AAC);
// 录音采样率(Hz) 如：AVSampleRateKey==8000/44100/96000（影响音频的质量）
recordSetting[AVSampleRateKey] = @(44100);
// 音频通道数 1 或 2
recordSetting[AVNumberOfChannelsKey] = @(1);
// 线性音频的位深度 8、16、24、32
recordSetting[AVLinearPCMBitDepthKey] = @(16);
//录音的质量
recordSetting[AVEncoderAudioQualityKey] = [NSNumber numberWithInt:AVAudioQualityHigh];
return recordSetting;
}
/**
* 开始录音
*
* @param basePath 设置录音基础路径（后面要加上具体录音的名字）
*/
-(void)startRecorder{
//处理权限问题
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *err = nil;
//设置AVAudioSession
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:&err];
[audioSession setActive:YES error:nil];
if(err) {
NSLog(@"获取权限失败");
return;
}
//初始化生成录音对象
err = nil;
NSURL *recordedFile = [NSURL fileURLWithPath:[RecordFile stringByAppendingString:@"kkk.aac"]];
NSDictionary *dic = [self recordingSettings];
_recorder = [[AVAudioRecorder alloc] initWithURL:recordedFile settings:dic error:&err];
if(_recorder == nil) {
NSLog(@"生成录音对象失败");
return;
}
//准备和开始录音
[_recorder prepareToRecord];
//启用录音测量
_recorder.meteringEnabled = YES;
//开始录音
[_recorder record];
[_recorder recordForDuration:0];
}
- (IBAction)stop:(UIButton*)sender {
//处理权限问题
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
NSError *err = nil;
//设置AVAudioSession
[audioSession setCategory:AVAudioSessionCategoryPlayback error:&err];
[audioSession setActive:YES error:nil];
NSURL * audioUrl = [NSURL fileURLWithPath:[RecordFile stringByAppendingString:@"kkk.aac"]];
_palyItem = [[AVPlayerItem alloc]initWithURL:audioUrl];
_player = [[AVPlayer alloc]initWithPlayerItem:_palyItem];
AVPlayerLayer *playerLayer=[AVPlayerLayer playerLayerWithPlayer:_player];
[sender.layer addSublayer:playerLayer];
[_player play];
}
@end
