ios录音Demo

<AudioToolbox/AudioToolbox.h> :这个库是C的接口，偏向于底层，主要用于在线流媒体的播放

<AVFoundation/AVFoundation.h> :提供了音频和回放的底层API，同时也负责管理音频的硬件

//需要遵循一个代理协议<AVAudioRecorderDelegate>

 

 

 

 

 

//
//  ViewController.m
//  录音录频
//

#import "ViewController.h"
//提供了音频和回放的底层API，同时也负责管理音频硬件
#import <AVFoundation/AVFoundation.h>

//这个库是C的接口，偏向于底层，主要用于在线流媒体的播放
#import <AudioToolbox/AudioToolbox.h>

@interface ViewController () <AVAudioRecorderDelegate>

{
    //用来录音
    AVAudioRecorder *recorder;

//设置定时检测，用来监听当前音量大小，控制话筒图片
    NSTimer *timer;
   
    //设置一个路径，用来保存本地录音的路径
    NSURL *urlPlay;
   
   
   
}

//用来控制录音功能
@property (nonatomic, strong) UIButton *btn;

//用来播放已经录好的音频文件
@property (nonatomic, strong) UIButton *playBtn;

//控制音量的图片
@property (nonatomic, strong) UIImageView *imageView;

//音频播放器
@property (nonatomic, strong) AVAudioPlayer *paly;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
   
    //基本步骤：1.进行录音设置（先配置录音机（是一个字典），设置录音的格式，录音的采样率，录音的先行采样位数，录音的通道数，录音质量，录音路径，初始化录音对象，开启音量检测）；2.设置录音按钮的功能（UI设置）3.设置播放按钮并实现播放功能
    //1.进行录音设置
    [self audio];
   
    //实现录音按钮的功能（UI设置）
    //2.加图片
    self.imageView = [[UIImageView alloc] initWithFrame:CGRectMake((self.view.frame.size.width - 100)/2, 100, 100, 100)];
    self.imageView.backgroundColor = [UIColor redColor];
   
    self.btn = [UIButton buttonWithType:UIButtonTypeCustom];
   
    self.btn.frame = CGRectMake(self.imageView.frame.origin.x, 250, 50, 40);    [self.btn setTitle:@"开始" forState:UIControlStateNormal];    [self.btn setBackgroundColor:[UIColor greenColor]];    self.playBtn = [UIButton buttonWithType:UIButtonTypeCustom];    self.playBtn.frame = CGRectMake(self.imageView.frame.origin.x + 50, 250, 50, 40);    [self.playBtn setTitle:@"播放" forState:UIControlStateNormal];    [self.playBtn setBackgroundColor:[UIColor cyanColor]];    [self.playBtn addTarget:self action:@selector(paly:) forControlEvents:UIControlEventTouchUpInside];       //设置按钮的事件，当按钮被按下时    [self.btn addTarget:self action:@selector(btnDown:) forControlEvents:UIControlEventTouchDown];    //当手指抬起时     [self.btn addTarget:self action:@selector(btnUp:) forControlEvents:UIControlEventTouchUpInside];       //当触摸拖动离开控制范围时     [self.btn addTarget:self action:@selector(btnDragUp:) forControlEvents:UIControlEventTouchDragExit];       [self.view addSubview:self.playBtn];    [self.view addSubview:self.btn];    [self.view addSubview:self.imageView];         }//点击播放按钮的实现播放- (void)paly:(UIButton *)sender{    //加载本地录音文件    self.paly = [[AVAudioPlayer alloc] initWithContentsOfURL:urlPlay error:nil];    //准备播放    [self.paly prepareToPlay];    //播放    [self.paly play];   }//录音设置的方法- (void)audio{    //1.先配置Recorder(录音机)    NSMutableDictionary *recorderSetting = [NSMutableDictionary dictionary];

   

    //2.设置录音的格式 / *在2000年被用在MPEG-4中（ISO 14496-3 Audio），所以现在变更为MPEG-4 AAC标准，也就是说，AAC已经成为MPEG4家族的主要成员之一，它是MPEG4第三部分中的音频编码系统。AAC可提供最多48个全音域音频通道。*/

    [recorderSetting setValue:[NSNumber numberWithInt:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey];
   
    //3.设置录音采样率 --采样频率是指录音设备在一秒钟内对声音信号的采样次数，采样频率越高声音的还原就越真实越自然。在当今的主流声卡上，采样频率一般共分为22.05KHz、44.1KHz、48KHz三个等级，22.05只能达到FM广播的声音品质，44.1KHz则是理论上的CD音质界限，48KHz则更加精确一些
    [recorderSetting setValue:[NSNumber numberWithFloat:44100] forKey:AVSampleRateKey];

//4.设置录音的通道数
    [recorderSetting setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey];
   

    //5.线性采样位数 8 ，16 ，24 ，32、采样位数可以理解为声卡处理声音的解析度。这个数值越大，解析度就越高，录制和回放的声音就越真实 --一般都是16位的（2的16次方）/*

PCM的基本参数是采样频率和采样位深，采样频率就是每秒采样多少次，位深就是声音通过拾音器转成的电平信号被量化的精细度，同时也代表一次采样会用多少位保存

*/

    [recorderSetting setValue:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
   
    //6,录音质量
    [recorderSetting setValue:[NSNumber numberWithInt:AVAudioQualityHigh] forKey:AVEncoderAudioQualityKey];
   
    //设置录音路径
    NSString *strUrl = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
   
    NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/record.aac",strUrl]];
   
    //记录当前路径
    urlPlay = url;
   
    //初始化录音对象
    NSError *error;
    recorder = [[AVAudioRecorder alloc] initWithURL:url settings:recorderSetting error:&error];
   
    //开启音量检测
    recorder.meteringEnabled = YES;
    recorder.delegate = self;

}

- (void)btnDown:(UIButton *)sender
{
   
    [sender setTitle:@"停止" forState:UIControlStateNormal];
    //创建录音文件，准备录音
    if([recorder prepareToRecord]){
   
        //开始
        [recorder record];
       
    }
   
    //设置定时检测，检测我们的图片
    timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(detectionVioce) userInfo:nil repeats:YES];

}
- (void)btnUp:(UIButton *)sender{

//UI状态
    [sender setTitle:@"开始" forState:UIControlStateNormal];
   
    //记录当前时间
    double cTime = recorder.currentTime;
   
    if (cTime > 2) {
       
        NSLog(@"放出去");
    }else{
        //删除我们的记录文件
        [recorder deleteRecording];
   
    }
   
    //停止录音
    [recorder stop];
    //停止计时器
    [timer invalidate];
}

- (void)btnDragUp:(UIButton *)sender{

[sender setTitle:@"开始" forState:UIControlStateNormal];
   
    //删除录制文件
    [recorder deleteRecording];
    //停止录音
    [recorder stop];
    //停止计时器
    [timer invalidate];
   
    NSLog(@"取消发送");
   
   
}

//检测当前声音
- (void)detectionVioce
{
   
    //刷新当前音量数据
    [recorder updateMeters];
    //获取音量的平均值
    double lowPassResults = pow(10, (0.05 * [recorder peakPowerForChannel:0]));//×于当前音量
     //现在取值范围在0~1   (每隔0.7)
    if(0 < lowPassResults < 0.06){
   
   
        [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(1)"]];
    }else if( 0.06< lowPassResults <= 0.13){
   
      [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(2)"]];
   
    }else if( 0.13<lowPassResults <= 0.20){
       
        [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(3)"]];
       
    }else if( 0.20 <lowPassResults <= 0.27){
       
        [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(4)"]];
       
    }else if( 0.27 <lowPassResults <= 0.34){
       
        [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(5)"]];
       
    }else if( 0.34 <lowPassResults <= 0.41){
       
        [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(6)"]];
       
    }else if( 0.41 <lowPassResults <= 0.48){
       
        [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(7)"]];
       
    }。。。。。){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(8)"]];           }else if( 0.55 <lowPassResults <= 0.62){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(9)"]];           }else if( 0.62 <lowPassResults <= 0.69){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(10)"]];           }){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(8)"]];           }else if( 0.55 <lowPassResults <= 0.62){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(9)"]];           }else if( 0.62 <lowPassResults <= 0.69){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(10)"]];           }else if( 0.69 <lowPassResults <= 0.76){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(11)"]];           }else if( 0.76 <lowPassResults <= 0.83){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(12)"]];           }else if( 0.83 <lowPassResults <= 0.90){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(13)"]];           }else{                      [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(14)"]];           }else if( 0.48 <lowPassResults <= 0.55){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(8)"]];           }else if( 0.55 <lowPassResults <= 0.62){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(9)"]];           }else if( 0.62 <lowPassResults <= 0.69){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(10)"]];           }else if( 0.69 <lowPassResults <= 0.76){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(11)"]];           }else if( 0.76 <lowPassResults <= 0.83){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(12)"]];           }else if( 0.83 <lowPassResults <= 0.90){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(13)"]];           }else{                      [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(14)"]];           }else if( 0.48 <lowPassResults <= 0.55){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(8)"]];           }else if( 0.55 <lowPassResults <= 0.62){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(9)"]];           }else if( 0.62 <lowPassResults <= 0.69){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(10)"]];           }else if( 0.69 <lowPassResults <= 0.76){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(11)"]];           }else if( 0.76 <lowPassResults <= 0.83){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(12)"]];           }else if( 0.83 <lowPassResults <= 0.90){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(13)"]];           }else{                      [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(14)"]];           }else if( 0.48 <lowPassResults <= 0.55){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(8)"]];           }else if( 0.55 <lowPassResults <= 0.62){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(9)"]];           }else if( 0.62 <lowPassResults <= 0.69){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(10)"]];           }else if( 0.69 <lowPassResults <= 0.76){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(11)"]];           }else if( 0.76 <lowPassResults <= 0.83){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(12)"]];           }else if( 0.83 <lowPassResults <= 0.90){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(13)"]];           }else{                      [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(14)"]];           }){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(8)"]];           }else if( 0.55 <lowPassResults <= 0.62){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(9)"]];           }else if( 0.62 <lowPassResults <= 0.69){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(10)"]];           }else if( 0.69 <lowPassResults <= 0.76){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(11)"]];           }else if( 0.76 <lowPassResults <= 0.83){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(12)"]];           }else if( 0.83 <lowPassResults <= 0.90){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(13)"]];           }else{                      [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(14)"]];           }0.69){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(10)"]];           }else if( 0.69 <lowPassResults <= 0.76){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(11)"]];           }else if( 0.76 <lowPassResults <= 0.83){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(12)"]];           }else if( 0.83 <lowPassResults <= 0.90){               [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(13)"]];           }else{                      [self.imageView setImage:[UIImage imageNamed:@"iconfont-huatong(14)"]];