iOS 录音

很早之前做过的demo,送给需要的人,有空再补充相关知识.需要导入AVFoundation框架和#import <AVFoundation/AVFoundation.h>头文件

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIButton *luyinbutton;
@property (weak, nonatomic) IBOutlet UIButton *playbutton;
@property (weak, nonatomic) IBOutlet UIImageView *imageview;
@property (nonatomic, retain)AVAudioPlayer * avPlay;
@property (nonatomic, retain) AVAudioRecorder * recorder;
//坚挺音量大小,控制话筒图片
@property (nonatomic, retain) NSTimer * timer;
@property (nonatomic, retain) NSURL * urlPlay;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    //录音按钮绑定方法
    //按下
    [self.luyinbutton addTarget:self action:@selector(butDown:) forControlEvents:UIControlEventTouchDown];
    
    //手起来时
    [self.luyinbutton addTarget:self action:@selector(butUP:) forControlEvents:UIControlEventTouchUpInside];
    
    //收移开时
    [self.luyinbutton addTarget:self action:@selector(butDragUP:) forControlEvents:UIControlEventTouchDragExit];
    
    //播放按钮绑定方法
    [self.playbutton addTarget:self action:@selector(playRecordSoundButton:) forControlEvents:UIControlEventTouchUpInside];
    [self audio];
    self.imageview.image = [UIImage imageNamed:@"record_animate_01.png"];
    
    
}
//播放按钮方法
- (void)playRecordSoundButton:(UIButton *)sender
{
    //如果正在播放声音就暂停
    if (self.avPlay.playing) {
        [self.avPlay stop];
        return;
    }
    //初始化AVAudioPlayer 对象
    AVAudioPlayer * player = [[AVAudioPlayer alloc] initWithContentsOfURL:self.urlPlay error:nil];
    self.avPlay = player;
    [self.avPlay play];
    
}

- (void)butUP:(UIButton *)sender
{
    double cTime = self.recorder.currentTime;
    if (cTime > 2) {
        NSLog(@"发送成功");
    }else{
    //删除记录的文件
    [self.recorder deleteRecording];
    }
    [self.recorder stop];//录音结束
    [self.timer invalidate];//取消定时器
}

- (void)butDragUP:(UIButton *)sender
{
    [self.recorder deleteRecording];
    [self.recorder stop];//录音结束
    [self.timer invalidate];//取消定时器
    NSLog(@"取消发送");
}

- (void)butDown:(UIButton *)sender
{
    if ([self.recorder prepareToRecord]) {
        //开始录音
        [self.recorder record];
    }
    //定时检测
    self.timer = [NSTimer scheduledTimerWithTimeInterval:0 target:self selector:@selector(detectionVice) userInfo:nil repeats:YES];
}

//检测当前声音
- (void)detectionVice
{
    [self.recorder updateMeters];
    double lowPassResults = pow(10, (0.5 * [self.recorder peakPowerForChannel:0]));
    //图片随音量大小变化
    if (0<lowPassResults<=0.06) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_01.png"]];
    }else if (0.06<lowPassResults<=0.13) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_02.png"]];
    }else if (0.13<lowPassResults<=0.20) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_03.png"]];
    }else if (0.20<lowPassResults<=0.27) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_04.png"]];
    }else if (0.27<lowPassResults<=0.34) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_05.png"]];
    }else if (0.34<lowPassResults<=0.41) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_06.png"]];
    }else if (0.41<lowPassResults<=0.48) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_07.png"]];
    }else if (0.48<lowPassResults<=0.55) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_08.png"]];
    }else if (0.55<lowPassResults<=0.62) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_09.png"]];
    }else if (0.62<lowPassResults<=0.69) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_10.png"]];
    }else if (0.69<lowPassResults<=0.76) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_11.png"]];
    }else if (0.76<lowPassResults<=0.83) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_12.png"]];
    }else if (0.83<lowPassResults<=0.9) {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_13.png"]];
    }else {
        [self.imageview setImage:[UIImage imageNamed:@"record_animate_14.png"]];
    }//图片根据音量来变化,大家知道就好

}

//录音设置
- (void)audio
{
    NSMutableDictionary *recodeSeting = [@{} mutableCopy];
    [recodeSeting setValue:[NSNumber numberWithFloat:44100] forKey:AVSampleRateKey];
    //录音通道数
    [recodeSeting setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey];
    //线性采样位数
    [recodeSeting setValue:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
    //录音质量
    [recodeSeting setValue:[NSNumber numberWithInt:AVAudioQualityHigh] forKey:AVEncoderAudioQualityKey];
    //数据持久化(将声音存储到磁盘中)
    NSString *strUrl = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
    NSURL *url = [NSURL fileURLWithPath:[NSString stringWithFormat:@"%@lll.aac", strUrl]];
    self.urlPlay = nil;
    NSError *error = nil;
    //初始化AVAudioRecorder
    self.recorder = [[AVAudioRecorder alloc] initWithURL:url settings:recodeSeting error:&error];
    self.recorder.meteringEnabled = YES;
}