iOS录音

1.导入头文件,声明属性

#import <MobileCoreServices/MobileCoreServices.h>

@property (nonatomic,strong) AVAudioPlayer * audioPlayerSend;
@property (nonatomic,strong) AVAudioSession * audioSession;
@property (nonatomic,strong) AVAudioRecorder * audioRecorder;

2.定制录音按钮

self.longPressRecordBtn=[UIButton buttonWithType:UIButtonTypeCustom];
    self.longPressRecordBtn.frame=CGRectMake(50, 7, _screenW-140, 30);
    [self.longPressRecordBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [self.longPressRecordBtn setTitle:[NSString stringWithFormat:@"按住 说话"] forState:UIControlStateNormal];
    [self.longPressRecordBtn setTitle:[NSString stringWithFormat:@"松开 结束"] forState:UIControlStateHighlighted];
    [self.longPressRecordBtn setBackgroundImage:[UIImage imageNamed:@"bg_Tool_Record"] forState:UIControlStateNormal];
    [self.longPressRecordBtn addTarget:self action:@selector(talkPrepare) forControlEvents:UIControlEventTouchDown];
    [self.longPressRecordBtn addTarget:self action:@selector(talkSend) forControlEvents:UIControlEventTouchUpInside];
    [self.longPressRecordBtn addTarget:self action:@selector(recordViewBtnCancel) forControlEvents:UIControlEventTouchDragOutside];
    [self.longPressRecordBtn addTarget:self action:@selector(recordViewBtnRecording) forControlEvents:UIControlEventTouchDragInside];
    [self.longPressRecordBtn addTarget:self action:@selector(talkCancel) forControlEvents:UIControlEventTouchUpOutside];
    self.longPressRecordBtn.hidden=YES;

3.开始录音方法

-(void)startAudioRecord
{
    [_audioSession setActive:YES error: nil];
    
//    NSString * nnPKChat = [Util GetUUID];
//    NSString * nPKChat = [nnPKChat lowercaseString];
    
    // 获取音频文件的保存路径
    NSString *destinationString = [SaveAudioVoiceDataEngine getRecordTemporaryVoiceWholePath];
    NSURL *destinationURL = [NSURL fileURLWithPath:destinationString];
    // 创建一个NSDictionary，用于保存录制属性
    NSMutableDictionary *recordSettings = [[NSMutableDictionary alloc] init];
    
    // 设置录制音频的格式
    [recordSettings setObject:[NSNumber numberWithInt:kAudioFormatLinearPCM]
                       forKey: AVFormatIDKey];
    
    // 设置录制音频的采样率
    //    float sampleRate=11025.0;
    float sampleRate=8000.0;
    [recordSettings setObject:[NSNumber numberWithFloat:
                               sampleRate] forKey: AVSampleRateKey];
    
    // 设置录制音频的通道数
    NSInteger ch=1;
    [recordSettings setObject:
     [NSNumber numberWithInt:ch]
                       forKey:AVNumberOfChannelsKey];
    
    // 设置录制音频的每个样点的位数
    NSInteger bi=16;
    [recordSettings setObject: [NSNumber numberWithInt:bi]
                       forKey:AVLinearPCMBitDepthKey];
    
    //    // 设置录制音频采用高位优先的记录格式
    //    [recordSettings setObject:[NSNumber numberWithBool:NO]
    //                       forKey:AVLinearPCMIsBigEndianKey];
    //
    //    // 设置采样信号采用浮点数
    //    [recordSettings setObject:[NSNumber numberWithBool:NO]
    //                       forKey:AVLinearPCMIsFloatKey];
    //
    //    // 音频质量
    //    [recordSettings setValue:[NSNumber numberWithInt:AVAudioQualityMin] forKey:AVEncoderAudioQualityKey];
    NSError *recorderSetupError = nil;
    
    // 初始化AVAudioRecorder
    self.audioRecorder = [[AVAudioRecorder alloc] initWithURL:destinationURL
                                                     settings:recordSettings  error:&recorderSetupError];
    self.audioRecorder.meteringEnabled=YES;
    [self.audioRecorder updateMeters];
    self.audioRecorder.delegate = self;
    [self.audioRecorder record];
    
    _recordTimeNum=0.0;
    _recordingTimer = [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(volumeChange) userInfo:nil repeats:YES];
}

4.说话声音大小改变图片(并且存储临时声音文件)

-(void)volumeChange
{
    _recordTimeNum+=0.5;
    
    if (self.audioRecorder)
    {
        if (_recordTimeNum < 50)
        {
            [self.audioRecorder updateMeters];
            
            float h = pow(10, (0.05 * [self.audioRecorder peakPowerForChannel:0]));
            NSInteger vh = ceilf(h * 8);
            NSLog(@"---%f",h);
            
            self.recordingHUD.showVolumeView.image=[UIImage imageNamed:[NSString stringWithFormat:@"icon_chat_microphone%d",vh]];
        }else if (_recordTimeNum < 60)
        {
            [self showCancelRecordHUD];
            _cancelRecordHUD.statusLab.text=[NSString stringWithFormat:@"%.0f",ceilf(_recordTimeNum)];
        }else if (_recordTimeNum == 60)
        {
            _timeoutSended=YES;
            [self hidenRecordHUD];
            [self recordEndToSend];
        }
    }
}

5.发送语音消息

-(void)recordEndToSend
{
    [self closeAudioSessionAndAudioRecord];
    
    NSString *destinationString = [SaveAudioVoiceDataEngine getRecordTemporaryVoiceWholePath];
    NSURL *destinationURL = [NSURL fileURLWithPath:destinationString];
    
    AVAudioPlayer * avap = [[AVAudioPlayer alloc]initWithContentsOfURL:destinationURL error:nil];
    NSInteger l=(int)avap.duration;
    
    if (l >= 1)
    {
        NSString * nnPKChat = [Util GetUUID];
        NSString * nPKChat = [nnPKChat lowercaseString];
        NSString * updatePath = [SaveAudioVoiceDataEngine spliceRelativePathWithWithPKVoice:nPKChat phoneNumber:self.friendPhoneNumber pathType:1];
        
        [VoiceConverter wavToAmr:[SaveAudioVoiceDataEngine getRecordTemporaryVoiceWholePath] amrSavePath:[SaveAudioVoiceDataEngine getVoiceLocalWholePathWithPath:updatePath PKVoice:nPKChat]];
        
        MessageObj * obj = [[MessageObj alloc]init];
        obj.PKChat=nPKChat;
        obj.MessageType = 4;
        obj.MessageFromType=1;
        obj.PKUserFrom = _myUserStr;
        obj.MessageActions=@"";
        obj.createTime = [Util getNowDateTime];
        obj.voiceLength = l;
        obj.voiceStatus=1;
        obj.VoiceRelPath=updatePath;
        obj.messageSize = CGSizeMake(20, 20);
        
        [_array addObject:obj];
        [self.chatTableView reloadData];
        if (_array.count>0)
        {
            [self.chatTableView scrollToRowAtIndexPath:[NSIndexPath indexPathForRow:_array.count-1 inSection:0] atScrollPosition:UITableViewScrollPositionBottom animated:YES];
        }
        
        _recordTimeNum=0;
        
        [SNSInfomationEngine operateChatInfomationToSQLWithMessageObj:obj PKUserTo:self.PKUserFriend imageSize:CGSizeZero];
        [SaveAudioVoiceDataEngine sendChatVoiceWithMessageObj:obj PKUserTo:self.PKUserFriend chatMsgServer:self.chatMsgSer UserHostServer:_appdelegate.serviceUrl phoneNumber:self.friendPhoneNumber success:^
        {
            NSLog(@"sendVoiceSuccess");
        } Failure:^
        {
            NSLog(@"sendVoicefailure");
        }];
        
    }else
    {
        NSLog(@"说话时间太短");
    }
}