参考：http://blog.csdn.net/u013346305/article/details/47280731#t8
代码看下面，需要看效果的话直接复制到控制器即可，注意的是本案例采用storyboard布置界面，需要自己往ViewController里面拖拽几个UIBarButtonItem，并对UIBarButtonItem对应的方法连线。
【简单粗暴的录音、播放功能】注意以下是AVAudioRecorder文件里面主要的属性、对象方法、代理方法，并不是全部的，如有需要还得AVAudioRecorder.h中查看完整的属性、对象方法、代理方法。
| 属性 |
说明 |
| @property(readonly, getter=isRecording) BOOL recording;
|
是否正在录音，只读 |
| @property(readonly) NSURL *url;
|
录音文件存储地址，只读 |
| @property(readonly) NSDictionary *settings;
|
录音文件设置， 只读 |
| @property(readonly) NSTimeInterval currentTime;
|
录音时长，注意仅仅在录音状态可用 |
| @property(readonly) NSTimeInterval deviceCurrentTime;
|
输入设置的时间长度，只读 注意此属性一直可访问 |
| @property(getter=isMeteringEnabled) BOOL meteringEnabled;
|
是否启用录音测量 ，如果启用录音测量可以获得录音分贝等数据信息 |
| @property(nonatomic, copy) NSArray *channelAssignments;
|
当前录音的通道 |
| 对象方法 |
说明 |
| - (instancetype)initWithURL:(NSURL *)url settings:(NSDictionary *)settings error:(NSError **)outError;
|
录音机对象初始化方法，注意其中的url必须是本地文件url，settings是录音格式、编码等设置 |
| - (BOOL)prepareToRecord |
准备录音，主要用于创建缓冲区，如果不手动调用，在调用record录音时也会自动调用 |
| - (BOOL)record |
开始录音 |
| - (BOOL)recordAtTime:(NSTimeInterval)time;
|
在指定的时间开始录音，一般用于录音暂停再恢复录音 |
| - (BOOL)recordForDuration:(NSTimeInterval) duration;
|
按指定的时长开始录音 |
| - (BOOL)recordAtTime:(NSTimeInterval)time forDuration:(NSTimeInterval) duration;
|
在指定的时间开始录音，并指定录音时长 |
| - (void)pause;
|
暂停录音 |
| - (void)stop;
|
停止录音 |
| - (BOOL)deleteRecording;
|
删除录音，注意要删除录音此时录音机必须处于停止状态 |
| - (void)updateMeters;
|
更新测量数据，注意只有meteringEnabled为YES此方法才可用 |
| - (float)peakPowerForChannel:(NSUInteger)channelNumber;
|
指定通道的测量峰值，注意只有调用完updateMeters才有值 |
| - (float)averagePowerForChannel:(NSUInteger)channelNumber;
|
指定通道的测量平均值，注意只有调用完updateMeters才有值 |
| 代理方法 |
说明 |
| - (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag;
|
完成录音 |
| - (void)audioRecorderEncodeErrorDidOccur:(AVAudioRecorder *)recorder error:(NSError *)error;
|
录音编码发生错误 |
//
//ViewController.m
//录音
//
//Created by wwh on 17/2/21.
//Copyright ? 2017年 wwh. All rights reserved.
//#import "ViewController.h"
#import
#import "MBProgressHUD.h"#define kRecordAudioFile @"Record.caf"@interface ViewController ()@property (nonatomic,strong) AVAudioRecorder *audioRecorder;
//音频录音机
@property (nonatomic,strong) AVAudioPlayer *audioPlayer;
//音频播放器，用于播放录音文件
@property (nonatomic,strong) NSTimer *timer;
//录音声波监控
@property (nonatomic,strong) NSTimer *timer1;
//播放声波监控
@property (weak, nonatomic) IBOutlet UIProgressView*audioPower;
//音频波动
@end@implementation ViewController#pragma mark - 控制器视图方法- (void)dealloc {
[self.timer invalidate];
self.timer = nil;
[self.timer1 invalidate];
self.timer1 = nil;
}- (void)viewDidLoad {
[super viewDidLoad];
// 设置控制器View背景
self.view.backgroundColor = [UIColor darkGrayColor];
// 设置音频会话
[self setAudioSession];
}#pragma mark - 私有方法
/**
*设置音频会话
*/
- (void)setAudioSession {
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
//设置为播放和录音状态，以便可以在录制完之后播放录音
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];
[audioSession setActive:YES error:nil];
}/**
*取得录音文件保存路径
*
*@return 录音文件路径
*/
- (NSURL *)getSavePath {
NSString *urlStr = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
urlStr = [urlStr stringByAppendingPathComponent:kRecordAudioFile];
NSURL *url = [NSURL fileURLWithPath:urlStr];
return url;
}/**
*取得录音文件设置
*Note:在创建录音机时除了指定路径外还必须指定录音设置信息，因为录音机必须知道录音文件的格式、采样率、通道数、每个采样点的位数等信息，但是也并不是所有的信息都必须设置，通常只需要几个常用设置
*
*@return 录音设置
*/
- (NSDictionary *)getAudioSetting{
NSMutableDictionary *dicSettings = [NSMutableDictionary dictionary];
//设置录音格式
[dicSettings setObject:@(kAudioFormatLinearPCM) forKey:AVFormatIDKey];
//设置录音采样率，8000是电话采样率，对于一般录音已经够了
[dicSettings setObject:@(8000) forKey:AVSampleRateKey];
//设置通道,这里采用单声道
[dicSettings setObject:@(1) forKey:AVNumberOfChannelsKey];
//每个采样点位数,分为8、16、24、32
[dicSettings setObject:@(8) forKey:AVLinearPCMBitDepthKey];
//是否使用浮点数采样
[dicSettings setObject:@(YES) forKey:AVLinearPCMIsFloatKey];
//....其他设置等
return dicSettings;
}/**
*获得AVAudioRecorder对象
*
*@return AVAudioRecorder对象
*/
- (AVAudioRecorder *)audioRecorder{
if (!_audioRecorder) {
//创建录音文件保存路径
NSURL *url = [self getSavePath];
//创建录音格式设置
NSDictionary *setting = [self getAudioSetting];
//创建录音机
NSError *error = nil;
_audioRecorder = [[AVAudioRecorder alloc] initWithURL:url settings:setting error:&error];
_audioRecorder.delegate = self;
_audioRecorder.meteringEnabled = YES;
//如果要监控声波则必须设置为YES
if (error) {
NSLog(@"创建录音机对象时发生错误，错误信息：%@",error.localizedDescription);
return nil;
}
}
return _audioRecorder;
}/**
*创建播放器
*
*@return 播放器
*/
- (AVAudioPlayer *)audioPlayer{
if (!_audioPlayer) {
NSURL *url = [self getSavePath];
NSError *error = nil;
_audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
_audioPlayer.numberOfLoops = 0;
_audioPlayer.delegate = self;
_audioPlayer.meteringEnabled = YES;
[_audioPlayer prepareToPlay];
if (error) {
NSLog(@"创建播放器过程中发生错误，错误信息：%@",error.localizedDescription);
return nil;
}
}
return _audioPlayer;
}/**
*录音声波监控定制器
*
*@return 定时器
*/
- (NSTimer *)timer{
if (!_timer) {
_timer = [NSTimer scheduledTimerWithTimeInterval:0.1f target:self selector:@selector(audioPowerChange) userInfo:nil repeats:YES];
}
return _timer;
}/**
*播放声波监控定制器
*
*@return 定时器
*/
- (NSTimer *)timer1{
if (!_timer1) {
_timer1 = [NSTimer scheduledTimerWithTimeInterval:0.1f target:self selector:@selector(playAudioPowerChange) userInfo:nil repeats:YES];
}
return _timer1;
}/**
*录音声波状态设置
*/
- (void)audioPowerChange {
[self.audioRecorder updateMeters];
//更新测量值
float power = [self.audioRecorder averagePowerForChannel:0];
//取得第一个通道的音频，注意音频强度范围时-160到0
CGFloat progress = (1.0/160.0)*(power+160.0);
[self.audioPower setProgress:progress];
}#pragma mark - UI事件
/**
*点击录音按钮
*
*@param sender 录音按钮
*/
- (IBAction)recordClick:(UIBarButtonItem *)sender {
if (![self.audioRecorder isRecording]) {
// 满足一些特定时长录音需求
//- (BOOL)recordForDuration:(NSTimeInterval) duration;
[self.audioRecorder record];
//首次使用应用时如果调用record方法会询问用户是否允许使用麦克风
self.timer.fireDate = [NSDate distantPast];
}
}/**
*点击暂定按钮
*
*@param sender 暂停按钮
*/
- (IBAction)pauseClick:(UIBarButtonItem *)sender {
if ([self.audioRecorder isRecording]) {
[self.audioRecorder pause];
self.timer.fireDate = [NSDate distantFuture];
}
}/**
*点击恢复按钮
*恢复录音只需要再次调用record，AVAudioSession会帮助你记录上次录音位置并追加录音
*
*@param sender 恢复按钮
*/
- (IBAction)resumeClick:(UIBarButtonItem *)sender {[self recordClick:sender];
}/**
*点击停止按钮
*
*@param sender 停止按钮
*/
- (IBAction)stopClick:(UIBarButtonItem *)sender {
[self.audioRecorder stop];
self.timer.fireDate = [NSDate distantFuture];
self.audioPower.progress = 0.0;
}/**
*点击播放按钮
*
*@param sender 播放按钮
*/
- (IBAction)playClick:(UIBarButtonItem *)sender {
if (![self.audioPlayer isPlaying]) {
[self.audioPlayer play];
self.timer1.fireDate = [NSDate distantPast];
}
}/**
*播放声波状态设置
*/
- (void)playAudioPowerChange {
[self.audioPlayer updateMeters];
//更新测量值//取得第一个通道的音频，注意音频强度范围时-160到0
float power = [self.audioPlayer averagePowerForChannel:0];
CGFloat progress = (1.0/160.0)*(power+160.0);
[self.audioPower setProgress:progress];
}#pragma mark - AVAudioRecorderDelegate Methods
/**
*录音完成
*
*@param recorder AVAudioRecorder对象
*@param flag是否成功
*/
- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag{
if (flag) {
[MBProgressHUD showHUDAddedTo:self.view animated:YES];
MBProgressHUD *hud = [MBProgressHUD HUDForView:self.view];
hud.mode = MBProgressHUDModeCustomView;
hud.label.text = @"录音完毕";
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[hud hideAnimated:YES];
});
}
}#pragma mark - AVAudioPlayerDelegate Methods
/**
*播放完成
*
*@param player AVAudioPlayer对象
*@param flag是否成功
*/
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag {
if (flag) {
[MBProgressHUD showHUDAddedTo:self.view animated:YES];
MBProgressHUD *hud = [MBProgressHUD HUDForView:self.view];
hud.mode = MBProgressHUDModeCustomView;
hud.label.text = @"播放完毕";
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[hud hideAnimated:YES];
});
}
}@end
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