ios录音

#import "ViewController.h"

#import <AVFoundation/AVFoundation.h>

@interface ViewController ()

@property(nonatomic,strong)AVAudioRecorder*record;

@property(nonatomic,strong)CADisplayLink *updatereflesh;

@property(nonatomic,assign)CGFloat timePress;

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

//添加两个按钮

UIButton *playBtn=[UIButton buttonWithType:UIButtonTypeCustom];

playBtn.backgroundColor=[UIColor greenColor];

playBtn.frame=CGRectMake(10, 40, 100, 50);

[self.view addSubview:playBtn];

[playBtn addTarget:self action:@selector(playMusic) forControlEvents:UIControlEventTouchUpInside];

UIButton *pauseBtn=[UIButton buttonWithType:UIButtonTypeCustom];

pauseBtn.backgroundColor=[UIColor redColor];

pauseBtn.frame=CGRectMake(10, 100, 100, 50);

[self.view addSubview:pauseBtn];

[pauseBtn addTarget:self action:@selector(pause) forControlEvents:UIControlEventTouchUpInside];

//沉默两秒自动停止录音

//获取沙盒路径保存文件

NSString *path=[[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:@"123.caf"];

NSURL *url=[NSURL fileURLWithPath:path];

//录音

//    //settings  设置参数  录音相关参数  声道  速率  采样率

//    NSMutableDictionary *setting = [NSMutableDictionary dictionary];

//    //2.够着  录音参数

//    // 音频格式

//    setting[AVFormatIDKey] = @(kAudioFormatAppleIMA4);

//    // 音频采样率

//    setting[AVSampleRateKey] = @(8000.0);

//    // 音频通道数

//    setting[AVNumberOfChannelsKey] = @(1);

//    // 线性音频的位深度

//    setting[AVLinearPCMBitDepthKey] = @(8);

AVAudioRecorder *recorder=[[AVAudioRecorder alloc]initWithURL:url settings:nil error:NULL];

self.record=recorder;

//允许监听

self.record.meteringEnabled=YES;

}

//开始播放

-(void)playMusic

{

NSLog(@"开始录音");

[self.record record];

//开启定时器

[self.updatereflesh addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];

}

//暂停

-(void)pause

{

NSLog(@"结束录音");

[self.record stop];

NSLog(@"%@",NSHomeDirectory());

}

//创建定时器

-(CADisplayLink*)updatereflesh

{

if(!_updatereflesh)

{

_updatereflesh=[CADisplayLink displayLinkWithTarget:self selector:@selector(updateTimeAudioPinLv)];

}

return _updatereflesh;

}

-(void)updateTimeAudioPinLv

{

//时时更新分贝

[self.record updateMeters];

//获取当前分贝

CGFloat power=[self.record averagePowerForChannel:1];

//开始沉默记录时间

if(power<-30)

{

_timePress+=1.0/60;

if (_timePress>2.0) {

[self.record stop];

//定时器停止

[self.updatereflesh invalidate];

self.updatereflesh =nil;

}

}

else

{

_timePress=0;

}

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end