iOS--播放声音（AVAudioPlayer）、录音（AVAudioRecorder）

播放音频：

 

首先在导入框架：

#import <AVFoundation/AVFoundation.h>

 

//01  加载音频路径

 

NSString *str=[[NSBundle mainBundle] pathForResource:@"半点心_草蜢" ofType:@"mp3"];  

    NSURL *musicUrl=[NSURL fileURLWithPath:str];

//02 创建AVAudioPlayer的对象

  AVAudioPlayer*   _player=[[AVAudioPlayer alloc] initWithContentsOfURL:musicUrl error:nil];

 

//03 准备播放

//因为有些音频可能过大，一次性加载到内存可能会耗时过长，所以先使用准备播放，就是提前加载音频到内存中

      [_player prepareToPlay];

 

//开始播放

    [_player play];

 

//暂停播放

    [_player pause];

 

 

录音：

 

 

首先在导入框架：

#import <AVFoundation/AVFoundation.h>

 

//01 创建录音保存路径

   //保存到沙盒路径下

    NSString* path = [NSString stringWithFormat:@"%@/Documents/luyin", NSHomeDirectory()];

    NSURL* url = [NSURL fileURLWithPath:path];

 

// 02  对录音进行设置

 

以/*******————*****/开始，到/*******————*****/结束之间的代码可以完全一样，因为录音设置的对象太多了，以下设置方式，已经可以实现大多数的录音效果了，所以推荐没有特殊情况，不要修改，直接复制即可

 

/*******————*****/

    //录音设置

    NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc]init];

    //设置录音格式  AVFormatIDKey==kAudioFormatLinearPCM

    [recordSetting setValue:[NSNumber numberWithInt:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey];

    //设置录音采样率(Hz) 如：AVSampleRateKey==8000/44100/96000（影响音频的质量）

    [recordSetting setValue:[NSNumber numberWithFloat:44100] forKey:AVSampleRateKey];

    //录音通道数  1 或 2

    [recordSetting setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey];

    //线性采样位数  8、16、24、32

    [recordSetting setValue:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];

    //录音的质量

    [recordSetting setValue:[NSNumber numberWithInt:AVAudioQualityHigh] forKey:AVEncoderAudioQualityKey];

 

/*******————*****/

 

//03 创建AVAudioRecorder对象

//初始化录音

   AVAudioRecorder* _recorder = [[AVAudioRecorder alloc] initWithURL:url settings:recordSetting error:nil];

 

 

//04  准备录音

 

      //准备录音

    [_recorder prepareToRecord];

 

 

//开始录音

    [_recorder record];

//停止录音

  [_recorder stop];

 

完整代码工程：

第一个界面：播放音频

sstoryboard截图：

 

 对应代码：

#import "AZViewController.h"
#import <AVFoundation/AVFoundation.h>
#import "AZSecondViewController.h"
@interface  AZViewController ()
{
    AVAudioPlayer *_player;
    NSTimer  *_timer;
}
@property  (weak,  nonatomic )  IBOutlet  UISlider *proSlider;
@property  (weak,  nonatomic )  IBOutlet  UISlider *voiceSlider;
@property  (weak,  nonatomic )  IBOutlet  UISlider *panSlider;
@property  (weak,  nonatomic )  IBOutlet  UISlider *speedSlider;

@property  (weak,  nonatomic )  IBOutlet  UIProgressView *pv2;

@property  (weak,  nonatomic )  IBOutlet  UIProgressView *pv1;


- ( IBAction )play:( id )sender;
- ( IBAction )puse:( id )sender;
- ( IBAction )next:( id )sender;

@end

@implementation  AZViewController

- ( void )viewDidLoad
{
    [ super  viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self .navigationItem.title=@ "播放声音" ;

    NSString  *str=[[ NSBundle  mainBundle] pathForResource:@ "半点心_草蜢"  ofType:@ "mp3" ];

    NSURL  *musicUrl=[ NSURL  fileURLWithPath:str];

    _player=[[AVAudioPlayer alloc] initWithContentsOfURL:musicUrl error: nil ];

    //准备播放
    [_player prepareToPlay];


    //开启变速
    [_player setEnableRate: YES ];
    //开启峰值
    _player.meteringEnabled= YES ;


    [ self .proSlider addTarget: self  action: @selector (setProcess) forControlEvents:UIControlEventValueChanged];

    [ self .voiceSlider addTarget: self  action: @selector (changeVoice) forControlEvents:UIControlEventValueChanged];

    [ self .panSlider addTarget: self  action: @selector (changePan) forControlEvents:UIControlEventValueChanged];

    [ self .speedSlider addTarget: self  action: @selector (changeSpeed) forControlEvents:UIControlEventValueChanged];
}

-( void )setProcess
{
    //设置进度
    _player.currentTime=_player.duration* self .proSlider.value;
}
-( void )changeVoice
{
    //设置声音
    _player.volume= self .voiceSlider.value;
}
-( void )changePan
{
    _player.pan= self .panSlider.value;
}
-( void )changeSpeed
{
    //设置播放速度
    _player.rate= self .speedSlider.value;
}

- ( void )didReceiveMemoryWarning
{
    [ super  didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- ( IBAction )play:( id )sender
{
    //开始播放
    [_player play];
    if  (!_timer) {
       _timer=[ NSTimer  scheduledTimerWithTimeInterval:0.1 target: self  selector: @selector (timeCome) userInfo: nil  repeats: YES ];
    }
    [_timer setFireDate:[ NSDate  distantPast]];

}
-( void )timeCome
{
    //进度=当前时间/总时间
    float  pro=_player.currentTime/_player.duration;
    [ self .proSlider setValue:pro animated: YES ];

    //刷新峰值
    [_player updateMeters];
    //最大峰值
    float  peakValue=[_player peakPowerForChannel:0];

    //平均值
    float  avgValue=[_player averagePowerForChannel:0];


    //打印查看该音乐的最大峰值，和平均峰值的范围
    // NSLog(@"%f--%f",peakValue,avgValue);
    //该音乐一般为  -20，有的音乐可能不同
    [_pv1 setProgress:(peakValue+20)/20 animated: YES ];
    [_pv2 setProgress:(avgValue+20)/20 animated: YES ];
}

- ( IBAction )puse:( id )sender
{
    //暂停播放
    [_player pause];
    //暂停定时器
    [_timer setFireDate:[ NSDate  distantFuture]];

}

- ( IBAction )next:( id )sender
{
    AZSecondViewController *secondVC=[[AZSecondViewController alloc] init];
    [ self .navigationController pushViewController:secondVC animated: YES ];
}
@end

 第二个界面：录音

界面：

代码：

#import "AZSecondViewController.h"
#import <AVFoundation/AVFoundation.h>
@interface  AZSecondViewController ()
{
    UIButton *_button;
    AVAudioPlayer* _player;
    AVAudioRecorder* _recorder;
}
@end

@implementation  AZSecondViewController

- ( id )initWithNibName:( NSString  *)nibNameOrNil bundle:( NSBundle  *)nibBundleOrNil
{
    self  = [ super  initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if  ( self ) {
        // Custom initialization
    }
    return  self ;
}

- ( void )viewDidLoad
{
    [ super  viewDidLoad];
    // Do any additional setup after loading the view.
    self .view.backgroundColor=[UIColor whiteColor];
    self .navigationItem.title=@ "录音" ;
    _button=[UIButton buttonWithType:UIButtonTypeCustom];
    _button.frame=CGRectMake(100, 100, 100, 20);
    [_button setTitle:@ "开始录音"  forState:UIControlStateNormal];
    [_button setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
    [_button addTarget: self  action: @selector (startRecond) forControlEvents:UIControlEventTouchDown]; //按下开始响应事件

    [_button addTarget: self  action: @selector (stopRecond) forControlEvents:UIControlEventTouchUpInside]; //松开的响应事件
    [ self .view addSubview:_button];
    //保存到沙盒路径下
    NSString * path = [ NSString  stringWithFormat:@ "%@/Documents/luyin" ,  NSHomeDirectory ()];
    NSURL * url = [ NSURL  fileURLWithPath:path];

    //录音设置
    NSMutableDictionary  *recordSetting = [[ NSMutableDictionary  alloc]init];
    //设置录音格式  AVFormatIDKey==kAudioFormatLinearPCM
    [recordSetting setValue:[ NSNumber  numberWithInt:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey];
    //设置录音采样率(Hz) 如：AVSampleRateKey==8000/44100/96000（影响音频的质量）
    [recordSetting setValue:[ NSNumber  numberWithFloat:44100] forKey:AVSampleRateKey];
    //录音通道数  1 或 2
    [recordSetting setValue:[ NSNumber  numberWithInt:1] forKey:AVNumberOfChannelsKey];
    //线性采样位数  8、16、24、32
    [recordSetting setValue:[ NSNumber  numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
    //录音的质量
    [recordSetting setValue:[ NSNumber  numberWithInt:AVAudioQualityHigh] forKey:AVEncoderAudioQualityKey];


    //初始化录音
    _recorder = [[AVAudioRecorder alloc] initWithURL:url settings:recordSetting error: nil ];
    //准备录音
    [_recorder prepareToRecord];
    //[_recorder setMeteringEnabled:YES];


}
-( void )startRecond
{
    [_button setTitle:@ "录音中...."  forState:UIControlStateNormal];
    [_recorder record];

}
-( void )stopRecond
{
    [_button setTitle:@ "开始录音"  forState:UIControlStateNormal];
    [_recorder stop];

    NSString * path = [ NSString  stringWithFormat:@ "%@/Documents/luyin" ,  NSHomeDirectory ()];
    NSURL * url = [ NSURL  fileURLWithPath:path];
    _player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error: nil ];
    [_player prepareToPlay];
    [_player play];

}
- ( void )didReceiveMemoryWarning
{
    [ super  didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

/*
#pragma mark - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    // Get the new view controller using [segue destinationViewController].
    // Pass the selected object to the new view controller.
}
*/

@end