1.界面布局，以及相關功能

點擊中間開始錄音，點擊左上角播放或暫停播放，點擊右上角移除文件

2.定義相關屬性

#import "SendVoiceController.h"

#import#import "RecordVoiceView.h"

#import "lame.h"

#import "PlayVoiceView.h"

#define cafFilePathName @"myRecordForCaf.caf"

#define mp3FilePathName @"myRecordForMp3.mp3"

@interface SendVoiceController ()//錄音存儲路徑

@property (nonatomic, strong)NSURL *tmpFile;

//錄音

@property (nonatomic, strong)AVAudioRecorder *recorder;

//播放

@property (nonatomic, strong)AVAudioPlayer *player;

//錄音動畫

@property(nonatomic,strong)RecordVoiceView *recordview;

@property(strong,nonatomic)PlayVoiceView *playview;

//錄音計時器

@property(nonatomic,strong)NSTimer *recordTimer;

//錄音秒數

@property(strong,nonatomic)NSTimer *timer;

@property(nonatomic,assign)int index;

@property(nonatomic,assign)int duration;

@end

@implementation SendVoiceController

3.創建audiosession

-(void)setAVRecorder{

NSString *urlStr=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

urlStr=[urlStr stringByAppendingPathComponent:cafFilePathName];

self.tmpFile = [NSURL fileURLWithPath:urlStr];

//設置后臺播放

AVAudioSession *session = [AVAudioSession sharedInstance];

NSError *sessionError;

//AVAudioSessionCategoryPlayAndRecord,這個確保了既能錄音也能播放

[session setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError];

//判斷后臺有沒有播放

if (session == nil) {

NSLog(@"Error creating sessing:%@", [sessionError description]);

} else {

[session setActive:YES error:nil];

}

}

4.中間圖片手勢代理方法

//長按事件的實現方法

- (void) handleTableviewCellLongPressed:(UILongPressGestureRecognizer *)gestureRecognizer {

if (gestureRecognizer.state ==

UIGestureRecognizerStateBegan) {

NSLog(@"UIGestureRecognizerStateBegan");

[self recorderPressing];

}

if (gestureRecognizer.state ==

UIGestureRecognizerStateChanged) {

NSLog(@"UIGestureRecognizerStateChanged");

}

if (gestureRecognizer.state == UIGestureRecognizerStateEnded) {

NSLog(@"UIGestureRecognizerStateEnded");

[self recorderEnd];

}

}

5.創建AVAudioRecorder并開始錄音

-(void)recorderPressing{

NSDictionary *settingdic = [NSDictionary dictionaryWithObjectsAndKeys:

[NSNumber numberWithFloat:8000],? ? ? ? ? ? ? ? ? AVSampleRateKey, // 電話所用采樣率

[NSNumber numberWithInt:kAudioFormatLinearPCM],? ? AVFormatIDKey,

[NSNumber numberWithInt:2],? ? ? ? ? ? ? ? ? ? ? AVNumberOfChannelsKey,

[NSNumber numberWithInt:16],? ? ? ? ? ? ? ? ? ? ? AVLinearPCMBitDepthKey,

[NSNumber numberWithInt:AVAudioQualityMin],? ? ? AVEncoderAudioQualityKey,

nil];

//開始錄音,將所獲取到得錄音存到文件里

//開始錄音,將所獲取到得錄音存到文件里

self.recorder = [[AVAudioRecorder alloc] initWithURL:_tmpFile settings:settingdic error:nil];

self.recorder.meteringEnabled = YES;

self.recorder.delegate=self;

//準備記錄錄音

[self.recorder prepareToRecord];

//啟動或者恢復記錄的錄音文件

[self.recorder record];

self.player = nil;

//以下是我仿照衛星發語音的動畫效果

self.recordview.hidden=NO;

self.recordTimer=[NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(recordTimerChange) userInfo:nil repeats:YES];

}

6.中間圖片長按取消的同時關閉錄音

-(void)recorderEnd{

self.duration=self.index;

self.index=0;

//停止錄音

if (self.recordTimer) {

[self.recordTimer invalidate];

self.recordTimer=nil;

}

[self.recorder stop];

self.recordview.hidden=YES;

self.recorder = nil;

self.playBtn.hidden=NO;

self.removeBtn.hidden=NO;

self.curveLineImage.hidden=NO;

NSError *playError;

NSString *urlStr=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

urlStr=[urlStr stringByAppendingPathComponent:mp3FilePathName];

NSURL *url = [NSURL fileURLWithPath:urlStr];

self.player = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&playError];

//當播放錄音為空, 打印錯誤信息

if (self.player == nil) {

NSLog(@"Error crenting player: %@", [playError description]);

}

self.player.delegate = self;

//? ? [self.player play];

}

7.與其同時觸發avaudiorecord代理方法

這里面的主要作用是把錄音的caf文件轉成mp3文件，用于上傳到服務器，其中的方法是來自于Libmo3lame庫

#pragma mark－－-錄音代理

- (void)audioRecorderDidFinishRecording:(AVAudioRecorder *)recorder successfully:(BOOL)flag{

NSString *urlStr=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

NSString *cafFilePath =[urlStr stringByAppendingPathComponent:cafFilePathName];? ? //caf文件路徑

NSString *mp3FilePath = [urlStr stringByAppendingPathComponent:mp3FilePathName]; ;//存儲mp3文件的路徑

NSFileManager * fileManager=[ NSFileManager defaultManager ];

if ([fileManager fileExistsAtPath:cafFilePath]){

float msize= [[fileManager attributesOfItemAtPath:cafFilePath error:nil] fileSize]/(1024.0*1024.0);

NSLog(@"caf文件大小%lf",msize);

}else{

float msize= [[fileManager attributesOfItemAtPath:mp3FilePathName error:nil] fileSize]/(1024.0*1024.0);

NSLog(@"mp3文件大小%lf",msize);

}

if ([fileManager removeItemAtPath :mp3FilePath error : nil ])

{

NSLog ( @" 刪除 " );

}

@try {

int read, write;

FILE *pcm = fopen ([cafFilePath cStringUsingEncoding : 1 ], "rb" );? //source 被 轉換的音頻文件位置

if (pcm == NULL )

{

NSLog ( @"file not found" );

}

else

{

fseek (pcm, 4 * 1024 , SEEK_CUR );? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? //skip file header

FILE *mp3 = fopen ([mp3FilePath cStringUsingEncoding : 1 ], "wb" );? //output 輸出生成的 Mp3 文件位置

const int PCM_SIZE = 8192 ;

const int MP3_SIZE = 8192 ;

short int pcm_buffer[PCM_SIZE* 2 ];

unsigned char mp3_buffer[MP3_SIZE];

lame_t lame = lame_init ();

lame_set_num_channels (lame, 2 ); // 設置 1 為單通道，默認為 2 雙通道

lame_set_in_samplerate (lame,? 8000.0 ); //11025.0

//lame_set_VBR(lame, vbr_default);

lame_set_brate (lame, 16);

lame_set_mode (lame, 3 );

lame_set_quality (lame, 2 ); /* 2=high 5 = medium 7=low 音 質 */

lame_init_params (lame);

do {

read = fread (pcm_buffer, 2 * sizeof ( short int ), PCM_SIZE, pcm);

if (read == 0 )

write = lame_encode_flush (lame, mp3_buffer, MP3_SIZE);

else

write = lame_encode_buffer_interleaved (lame, pcm_buffer, read, mp3_buffer, MP3_SIZE);

fwrite (mp3_buffer, write, 1 , mp3);

} while (read != 0 );

lame_close (lame);

fclose (mp3);

fclose (pcm);

return? ;

}

return? ;

}

@catch (NSException *exception) {

NSLog ( @"%@" ,[exception description ]);

return? ;

}

@finally {

NSLog ( @" 執行完成 " );

}

}

8.左上角按鈕事件

-(IBAction)playerClick:(id)sender{

NSString *urlStr=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

NSString * path=[urlStr stringByAppendingPathComponent:cafFilePathName];

NSFileManager* manager = [NSFileManager defaultManager];

if ([manager fileExistsAtPath:path]){

float msize= [[manager attributesOfItemAtPath:path error:nil] fileSize]/(1024.0*1024.0);

NSLog(@"文件大小%lf",msize);

}

else{

_player=nil;

}

//判斷是否正在播放,如果正在播放

if ([self.player isPlaying]) {

//暫停播放

[_player pause];

[self.playBtn? setImage:[UIImage imageNamed:@"voice_play"] forState:UIControlStateNormal];

//按鈕顯示為播放

} else {

//開始播放

[_player play];

[self.playBtn? setImage:[UIImage imageNamed:@"voice_pause"] forState:UIControlStateNormal];

}

}

9.右上角按鈕事件

-(IBAction)removeClick:(id)sender{

NSIndexPath *indexpath=[NSIndexPath indexPathForItem:6 inSection:0];

self.playBtn.hidden=YES;

self.removeBtn.hidden=YES;

self.curveLineImage.hidden=YES;

NSString *urlStr=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

NSString *cafFilePath =[urlStr stringByAppendingPathComponent:cafFilePathName];? ? //caf文件路徑

NSString *mp3FilePath = [urlStr stringByAppendingPathComponent:mp3FilePathName]; ;//存儲mp3文件的路徑

NSFileManager * fileManager=[ NSFileManager defaultManager ];

if ([fileManager removeItemAtPath :mp3FilePath error : nil ])

{

NSLog ( @" 刪除 mp3" );

}

if ([fileManager removeItemAtPath :cafFilePath error : nil ])

{

NSLog ( @" 刪除 caf" );

}

}

10.上傳到服務器

主要的邏輯是把MP3文件轉成nsdata，然后通過base64string 轉成字符串傳給后臺

NSString *url=[[HJInterfaceManager sharedInstance]addRichInfo];

NSMutableDictionary *mdic=[[NSMutableDictionary alloc]initWithCapacity:0];

NSString *urlStr=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

NSString *mp3FilePath = [urlStr stringByAppendingPathComponent:mp3FilePathName]; ;//

//? ? NSString *imagePath = [[NSBundle mainBundle] pathForResource:@"1" ofType:@"png"];

NSData *filedata=[NSData dataWithContentsOfFile:mp3FilePath];

SelfDataModel *selfModel=[SelfDataModel returnModelBySelectFMDB];

//? ? ? ? * @param familyId

//? ? ? ? * @param userId

//? ? ? ? * @param content

//? ? ? ? * @param richContent

//? ? ? ? * @param type

//? ? ? ? * @param sendTime

NSDate *date=[NSDate date];

NSDateFormatter *form=[[NSDateFormatter alloc]init];

[form setDateFormat:@"YYYY-MM-dd HH:mm:ss"];

NSString *datestr=[form stringFromDate:date ];

if (!self.isMyself) {

[mdic setObject:self.family.idNum forKey:@"familyId"];

}

[mdic setObject:selfModel.idNum forKey:@"userId"];

[mdic setObject:@"" forKey:@"content"];

[mdic setObject:[NSString stringWithFormat:@"%d",self.duration] forKey:@"duration"];

[mdic setObject:[filedata base64Encoding] forKey:@"richContents"];

[mdic setObject:@"SOUND" forKey:@"type"];

[mdic setObject:datestr forKey:@"sendTime"];

[HJHttpManager PostRequestWithUrl:url param:mdic finish:^(NSData *data) {

NSDictionary *dic=(NSDictionary *)data;

if ([dic[@"status"] isEqualToString:@"S"]) {

[MBProgressHUD showSuccess:@"發送成功"];

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

[self.navigationController popViewControllerAnimated:YES];

});

}else{

[MBProgressHUD showError:dic[@"message"]];

}

} failed:^(NSError *error) {

NSLog(@"請求失敗");

}];

小帖士：

以下是監聽聲音分貝的方法

#pragma mark----監聽聲音分貝

/* 該方法確實會隨環境音量變化而變化，但具體分貝值是否準確暫時沒有研究 */

- (void)recordTimerChange {

//? ? [self.recorder updateMeters];//刷新音量數據

//? ? double lowPassResults = pow(10, (0.05 * [self.recorder peakPowerForChannel:0]));

//? ? NSLog(@"大小：%lf",lowPassResults);

self.recordview.timeLab.text=[NSString stringWithFormat:@"%d s",self.index];

self.index++;

[self.recorder updateMeters];

float? level;? ? ? ? ? ? ? ? // The linear 0.0 .. 1.0 value we need.

float? minDecibels = -80.0f; // Or use -60dB, which I measured in a silent room.

float? decibels? ? = [self.recorder averagePowerForChannel:0];

if (decibels < minDecibels)

{

level = 0.0f;

}

else if (decibels >= 0.0f)

{

level = 1.0f;

}

else

{

float? root? ? ? ? ? ? = 2.0f;

float? minAmp? ? ? ? ? = powf(10.0f, 0.05f * minDecibels);

float? inverseAmpRange = 1.0f / (1.0f - minAmp);

float? amp? ? ? ? ? ? = powf(10.0f, 0.05f * decibels);

float? adjAmp? ? ? ? ? = (amp - minAmp) * inverseAmpRange;

level = powf(adjAmp, 1.0f / root);

}

float ben=level*120;

if (ben<20) {

[self.recordview.imageview setImage:[UIImage imageNamed:@"order_voice_1"]];

}

else if (ben<35) {

[self.recordview.imageview setImage:[UIImage imageNamed:@"order_voice_2"]];

}

else{

[self.recordview.imageview setImage:[UIImage imageNamed:@"order_voice_3"]];

}

NSLog(@"大小%lf",ben);

}

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