ios录音功能实现

来源：互联网发布：python 写入环境变量编辑：程序博客网时间：2024/05/16 09:03

实现功能主要为：按下按钮开始录音，时间条开始计时，松开停止录音，时间条停止计时，滑开手指放弃录音。保存录音文件到本地document文件中。

一、导入头文件和代理

#import <AVFoundation/AVFoundation.h>

<AVAudioRecorderDelegate>

二、在.h文件中声明

{    MBProgressHUD *HUD;    UILabel *noticeLabel;//提示标签}@property (nonatomic,strong) UIView *recordView;//录音界面@property (nonatomic,strong) UIButton *recordBtn;//录音按钮@property (nonatomic,strong) UILabel *timeLabel;  //录音计时@property (nonatomic,strong) AVAudioRecorder *audioRecorder;//音频录音机@property (nonatomic,assign) NSInteger countNum;//录音计时（秒）@property (nonatomic,strong) NSTimer *timer1;  //控制录音时长显示更新@property (nonatomic,copy) NSString *cafPathStr;

三、正文

在.m文件中添加

#define margin 15#define kSandboxPathStr [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject]#define kCafFileName @"myRecord.caf"/** *存放所有的音乐播放器 */static NSMutableDictionary *_musices;

//页面布局- (void)setupView{    CGFloat recordH = SCREEN_HEIGHT * 0.4;    CGFloat availH = recordH - margin * 4;    _recordView = [[UIView alloc]initWithFrame:CGRectMake(0, SCREEN_HEIGHT - recordH, SCREEN_WIDTH, recordH)];    _recordView.backgroundColor = [UIColor whiteColor];    [self addSubview:_recordView];    CGFloat timeH = availH * 0.2;    CGFloat btnH = availH * 0.7;    CGFloat noticeH = availH * 0.1;    self.timeLabel.frame = CGRectMake(0, margin, SCREEN_WIDTH, timeH);    self.recordBtn.frame = CGRectMake((SCREEN_WIDTH - btnH)*0.5, CGRectGetMaxY(self.timeLabel.frame) + margin, btnH, btnH);    self.recordBtn.layer.cornerRadius = self.recordBtn.frame.size.width * 0.5;    [self.recordBtn.layer setMasksToBounds:YES];    [self.recordBtn addTarget:self action:@selector(startRecordNotice) forControlEvents:UIControlEventTouchDown];    [self.recordBtn addTarget:self action:@selector(stopRecordNotice) forControlEvents:UIControlEventTouchUpInside];    [self.recordBtn addTarget:self action:@selector(cancelRecordNotice) forControlEvents:UIControlEventTouchUpOutside];    self.closeBtn.frame = CGRectMake(SCREEN_WIDTH - 25, 5, 20, 20);    [_closeBtn addTarget:self action:@selector(closeBtnClick) forControlEvents:UIControlEventTouchUpInside];    [_recordView addSubview:self.timeLabel];    [_recordView addSubview:self.recordBtn];    [_recordView addSubview:self.closeBtn];    noticeLabel = [[UILabel alloc]init];    noticeLabel.frame = CGRectMake(0, recordH - noticeH - margin, SCREEN_WIDTH, noticeH);    noticeLabel.textAlignment = NSTextAlignmentCenter;    noticeLabel.textColor = [UIColor lightGrayColor];    noticeLabel.font = [UIFont systemFontOfSize:14];    noticeLabel.text = @"按住不放录制语音";    [_recordView addSubview:noticeLabel];    self.timeLabel2.text = @"";    self.cafPathStr = [kSandboxPathStr stringByAppendingPathComponent:kCafFileName];}-(UIButton *)closeBtn{    if (!_closeBtn) {        _closeBtn = [[UIButton alloc]init];        [_closeBtn setBackgroundImage:[UIImage imageNamed:@"infoClose.png"] forState:UIControlStateNormal];    }    return _closeBtn;}-(UILabel *)timeLabel{    if (!_timeLabel) {        _timeLabel = [[UILabel alloc]init];        _timeLabel.textAlignment = NSTextAlignmentCenter;        _timeLabel.font = [UIFont fontWithName:@"HelveticaNeue-Thin" size:42];        _timeLabel.text = @"00:00";        _timeLabel.textColor = MF_ColorFromRGB(215, 155, 252);    }    return _timeLabel;}- (UIButton *)recordBtn{    if (!_recordBtn) {        _recordBtn = [[UIButton alloc]init];        _recordBtn.backgroundColor = [UIColor clearColor];        [_recordBtn setBackgroundImage:[UIImage imageNamed:@"record_norm"] forState:UIControlStateNormal];        [_recordBtn setBackgroundImage:[UIImage imageNamed:@"record_high"] forState:UIControlStateHighlighted];//        _recordBtn.userInteractionEnabled = YES;//方便添加长按手势    }    return _recordBtn;}

//点击关闭页面按钮- (void)closeBtnClick{    [self removeFromSuperview];}

#pragma mark - 录音方法//改变录音时间- (void)changeRecordTime{    self.countNum += 1;    NSInteger min = self.countNum/60;    NSInteger sec = self.countNum - min * 60; //   NSInteger sec = self.countNum;    self.timeLabel.text = [NSString stringWithFormat:@"%02ld:%02ld",(long)min,(long)sec];    if (sec == 59) {        [self stopRecordNotice];    }}- (void)startRecordNotice{    self.timeLabel2.text = @"";    [self stopMusicWithUrl:[NSURL URLWithString:self.cafPathStr]];    if ([self.audioRecorder isRecording]) {        [self.audioRecorder stop];    }//    NSLog(@"----------开始录音----------");    [self deleteOldRecordFile];//    如果不删掉，会在原文件基础上录制；虽然不会播放原来的声音，但是音频长度会是录制的最大长度。    AVAudioSession *audioSession=[AVAudioSession sharedInstance];    [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];    if (![self.audioRecorder isRecording]){//    {0--停止、暂停，1-录制中        [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.countNum = 0;        NSTimeInterval timeInterval =1 ;//    0.1s        self.timer1 = [NSTimer scheduledTimerWithTimeInterval:timeInterval  target:self selector:@selector(changeRecordTime)  userInfo:nil  repeats:YES];        [self.timer1 fire];    }    noticeLabel.text = @"脱离按钮，松开手指放弃录音";}- (void)stopRecordNotice{//    NSLog(@"----------结束录音----------");    [self.audioRecorder stop];    [self.timer1 invalidate];//    计算文件大小    long long fileSize = [self fileSizeAtPath:self.mp3PathStr]/1024.0;    NSString *fileSizeStr = [NSString stringWithFormat:@"%lld",fileSize];    self.timeLabel2.text = [NSString stringWithFormat:@"%ld \" %@kb  ",(long)self.countNum,fileSizeStr];    self.timeLabel.text = @"01:00";    [self.delegate getRecordData:self.mp3PathStr type:@"2" fileName:kMp3FileName];    [self removeFromSuperview];}- (void)cancelRecordNotice{//    NSLog(@"----------取消录音----------");    [self.audioRecorder stop];    [self.timer1 invalidate];    //    计算文件大小    long long fileSize = [self fileSizeAtPath:self.mp3PathStr]/1024.0;    NSString *fileSizeStr = [NSString stringWithFormat:@"%lld",fileSize];    self.timeLabel2.text = [NSString stringWithFormat:@"%ld \" %@kb  ",(long)self.countNum,fileSizeStr];    self.timeLabel.text = @"00:00";    noticeLabel.text = @"按住不放录制语音";}

//删除旧录音缓存-(void)deleteOldRecordFile{    NSFileManager* fileManager=[NSFileManager defaultManager];    BOOL blHave=[[NSFileManager defaultManager] fileExistsAtPath:self.cafPathStr];    if (!blHave) {//        NSLog(@"不存在");        return ;    }else {//        NSLog(@"存在");        BOOL blDele= [fileManager removeItemAtPath:self.cafPathStr error:nil];        if (blDele) {//            NSLog(@"删除成功");        }else {//            NSLog(@"删除失败");        }    }}

#pragma mark -  Getter/** *  获得录音机对象 * *  @return 录音机对象 */-(AVAudioRecorder *)audioRecorder{    if (!_audioRecorder) {        //创建录音文件保存路径        NSURL *url=[NSURL URLWithString:self.cafPathStr];        //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;}/** *  取得录音文件设置 * *  @return 录音设置 */-(NSDictionary *)getAudioSetting{    //LinearPCM 是iOS的一种无损编码格式,但是体积较为庞大    //录音设置    NSMutableDictionary *recordSettings = [[NSMutableDictionary alloc] init];    //录音格式 无法使用    [recordSettings setValue :[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey: AVFormatIDKey];    //采样率    [recordSettings setValue :[NSNumber numberWithFloat:11025.0] forKey: AVSampleRateKey];//44100.0    //通道数    [recordSettings setValue :[NSNumber numberWithInt:2] forKey: AVNumberOfChannelsKey];    //线性采样位数    //[recordSettings setValue :[NSNumber numberWithInt:16] forKey: AVLinearPCMBitDepthKey];    //音频质量,采样质量    [recordSettings setValue:[NSNumber numberWithInt:AVAudioQualityMin] forKey:AVEncoderAudioQualityKey];    return recordSettings;}

/** *停止播放音乐文件 */- (void)stopMusicWithUrl:(NSURL *)fileUrl{    if (!fileUrl) return;//如果没有传入文件名，那么就直接返回    //1.取出对应的播放器    AVAudioPlayer *player=[self musices][fileUrl];    //2.停止    if ([player isPlaying]) {        [player stop];//        NSLog(@"播放结束:%@--------",fileUrl);    }    if ([[self musices].allKeys containsObject:fileUrl]) {        [[self musices] removeObjectForKey:fileUrl];    }}

//单个文件的大小- (long long) fileSizeAtPath:(NSString*)filePath{    NSFileManager* manager = [NSFileManager defaultManager];    if ([manager fileExistsAtPath:filePath]){        return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];    }else{        NSLog(@"计算文件大小：文件不存在");    }    return 0;}

PS：ios音频播放实现http://blog.csdn.net/fantasy_jun/article/details/77895525

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