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。
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