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 ;// 0.1sself.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YESif (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/fantasy_jun/article/details/77895525
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