iOS 录音及播放 音波图波形

Posted 2023-03-18

参考技术A #pragma mark -录音设置配置

- (void)initRecordConfig

//录音设置

NSMutableDictionary*recordSetting = [[NSMutableDictionaryalloc]init];

//设置录音格式AVFormatIDKey==kAudioFormatLinearPCM

[recordSettingsetValue:[NSNumbernumberWithInt:kAudioFormatLinearPCM]forKey:AVFormatIDKey];

//设置录音采样率(Hz)如：AVSampleRateKey==8000/44100/96000（影响音频的质量）,采样率必须要设为11025才能使转化成mp3格式后不会失真

[recordSettingsetValue:[NSNumbernumberWithFloat:11025.0]forKey:AVSampleRateKey];

//录音通道数1或2，要转换成mp3格式必须为双通道

[recordSettingsetValue:[NSNumbernumberWithInt:2]forKey:AVNumberOfChannelsKey];

//线性采样位数8、16、24、32

[recordSettingsetValue:[NSNumbernumberWithInt:16]forKey:AVLinearPCMBitDepthKey];

//录音的质量

[recordSettingsetValue:[NSNumbernumberWithInt:AVAudioQualityHigh]forKey:AVEncoderAudioQualityKey];

//存储录音文件

_recordUrl= [NSURLURLWithString:[NSTemporaryDirectory()stringByAppendingString:@"selfRecord.caf"]];

//初始化

_audioRecorder= [[AVAudioRecorderalloc]initWithURL:_recordUrlsettings:recordSettingerror:nil];

//开启音量检测

_audioRecorder.meteringEnabled=YES;

_audioRecorder.delegate=self;



录音长按按钮

#pragma mark- UILongPressGestureRecognizer

//添加手势操作，长按按钮

- (void)handSpeakBtnPressed:(UILongPressGestureRecognizer*)gestureRecognizer

UIView*view= gestureRecognizer.view;

UIImageView*imageView = (UIImageView*)view.superview;

if(gestureRecognizer.state==UIGestureRecognizerStateBegan)

if(self.typeIndex==2||self.typeIndex==4)

[selfplayVoiceBtnAction];

return;



[imageViewstartAnimating];

[selfstartRecordVoice];

self.remindLabel.text=@"松开结束";



if(gestureRecognizer.state==UIGestureRecognizerStateEnded)

[imageViewstopAnimating];

[selfstopRecordVoice];

self.remindLabel.text=@"按住说话";





#pragma mark --------开始录音

- (void)startRecordVoice

[self.sendkBtnsetUserInteractionEnabled:NO];

_audiosession= [AVAudioSessionsharedInstance];//得到AVAudioSession单例对象

[self.audioSessionsetCategory:AVAudioSessionCategoryPlayAndRecorderror:nil];//设置类别,表示该应用同时支持播放和录音

[self.audioSessionsetActive:YESerror:nil];//启动音频会话管理,此时会阻断后台音乐的播放.

[self.audioRecorderprepareToRecord];

[self.audioRecorderpeakPowerForChannel:1.0];

[self.audioRecorderrecord];

self.second=0;

self.timer= [NSTimerscheduledTimerWithTimeInterval:1target:selfselector:@selector(timeAnim)userInfo:nilrepeats:YES];



#pragma mark -定时器

- (void)timeAnim

if(self.second>=TOTAL_SECOND)

[selfstopRecordVoice];

[self.timerinvalidate];



self.second++;

if(self.second<10)

self.timeLabel.textColor= [UIColorcolorWithHexString:@"818C9E"];

self.timeLabel.text= [NSStringstringWithFormat:@"0:0%ld",(long)self.second];

else

self.timeLabel.textColor= [UIColorcolorWithHexString:@"818C9E"];

self.timeLabel.text= [NSStringstringWithFormat:@"0:%ld",(long)self.second];





#pragma mark --------停止录音

- (void)stopRecordVoice

if(self.typeIndex!=1)

return;



[self.recordBtnImageViewstopAnimating];

if(self.second<5)

self.timeLabel.text=@"0:00";

[self.timerinvalidate];

[self.audioRecorderstop];//录音停止

[self.audioSessionsetActive:NOerror:nil];//一定要在录音停止以后再关闭音频会话管理（否则会报错），此时会延续后台音乐播放

self.timeLabel.textColor= [UIColorcolorWithHexString:@"E6E8EB"];

[MBProgressHUDshowError:@"说话时间不得低于5秒"toView:self.view];

else

[selftransformCAFToMP3];

[self.timerinvalidate];

[self.audioRecorderstop];//录音停止

[self.audioSessionsetCategory:AVAudioSessionCategoryPlaybackerror:nil];//此处需要恢复设置回放标志，否则会导致其它播放声音也会变小

[self.audioSessionsetActive:NOerror:nil];//一定要在录音停止以后再关闭音频会话管理（否则会报错），此时会延续后台音乐播放

if(self.playerView==nil)

NSString*videoStr = [NSTemporaryDirectory()stringByAppendingPathComponent:@"myselfRecord.mp3"];

NSURL*fileURL = [NSURLfileURLWithPath:videoStr];

AVURLAsset*asset = [AVURLAssetURLAssetWithURL:fileURLoptions:nil];

//录音完的时候调用，显示音波图

self.playerView= [[SYWaveformPlayerViewalloc]initWithFrame:CGRectMake(0,116,self.view.frame.size.width,82)asset:assetcolor:[UIColorlightGrayColor]progressColor:[UIColorcolorWithHexString:@"818C9E"]];

[self.WaveformViewaddSubview:self.playerView];



self.timeLabel.font= [UIFontsystemFontOfSize:32];

[self.timeLabelsetFont:[UIFontfontWithName:@"Helvetica-Bold"size:32]];

self.timeLabel.frame=CGRectMake(0,221,WIDTH,32);

self.remindLabel.hidden=YES;

self.typeIndex=2;

self.recordBtnImageView.image=kImageWithName(@"btn_recording_play");

//基于现有的一个值,再进行平移

self.sendkBtn.hidden=NO;

//基于现有的一个值,再进行平移

self.delectVoiceBtn.hidden=NO;

self.delectVoiceBtn.alpha=0;

self.sendkBtn.alpha=0;

[UIViewanimateWithDuration:0.5animations:^

self.delectVoiceBtn.transform=CGAffineTransformTranslate(self.delectVoiceBtn.transform, -(WIDTH/2-55),0);

self.sendkBtn.transform=CGAffineTransformTranslate(self.sendkBtn.transform,WIDTH/2-55,0);

self.delectVoiceBtn.alpha=1;

self.sendkBtn.alpha=1;

];





音波图的库 http://www.open-open.com/lib/view/home/1422534470439

基于Swift的iOS应用程序开发：录音及播放声音

本文所涉及内容适合在SwiftUI架构下使用。文末提供有完整的封装好的类。

欢迎给我留言，或是写邮件给我：

[e-mail]

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一、声明

 

首先声明文件的保存路径及音频文件的后缀名：

public let PATH_DOC = "/Documents";
public let AUDIO_SUFFIX = "m4a";

然后是与录音与播放有关的一些类：

//录音器、会话和播放器
public var audioRecorder:AVAudioRecorder!;
public var audioSession:AVAudioSession!;
public var audioPlayer:AVAudioPlayer!;

这三个类都存在于AVKit中：

import AVKit

二、权限

在XCode的Info配置中添加对于麦克风的使用权限：

Privacy - Microphone Usage Description

 

 在代码中，我们需要在创建AVAudioSession的时候来判断权限是否已经获取到了：