音频处理（录音一）

来源：互联网发布：mac os x sierra下载编辑：程序博客网时间：2024/06/09 23:34

简单录音功能实现可以录音和播放，根据声音大小显示相应的音量图片。

1.添加框架AVFoundation.framework与CoreAudio.framework

创建两个按钮

startButton = [UIButtonbuttonWithType:UIButtonTypeCustom];

startButton.frame =CGRectMake(50, 300,100, 50);

startButton.backgroundColor = [UIColorblackColor];

[startButtonaddTarget:selfaction:@selector(startStop)forControlEvents:UIControlEventTouchUpInside];

[startButtonsetTitle:@"开始录音" forState:UIControlStateNormal];

[self.viewaddSubview:startButton];

UIButton * playButton = [UIButtonbuttonWithType:UIButtonTypeCustom];

playButton.frame = CGRectMake(200,300, 100, 50);

playButton.backgroundColor = [UIColorblackColor];

[playButton addTarget:selfaction:@selector(play)forControlEvents:UIControlEventTouchUpInside];

[playButton setTitle:@"开始播放" forState:UIControlStateNormal];

[self.view addSubview:playButton];

3. 创建一个url

recordedTempFile = [NSURLfileURLWithPath:[NSTemporaryDirectory()stringByAppendingString:@"RecordedFile"]];

AVAudioSession *session = [AVAudioSessionsharedInstance];

[session setCategory:AVAudioSessionCategoryPlayAndRecorderror:nil];

[session setActive:YESerror:nil];

4.创建一个imageview

self.imageView = [[UIImageViewalloc] initWithFrame:CGRectMake(50,50, 100,100)];

[self.viewaddSubview:self.imageView];

具体代码如下：

- (void)viewDidLoad

{

[superviewDidLoad];

[selfcreatButton];

startOrStopFlag = YES;

recordedTempFile = [NSURLfileURLWithPath:[NSTemporaryDirectory()stringByAppendingString:@"RecordedFile"]];

AVAudioSession *session = [AVAudioSessionsharedInstance];

[session setCategory:AVAudioSessionCategoryPlayAndRecorderror:nil];

[session setActive:YESerror:nil];

}

- (void)creatButton

{

startButton = [UIButtonbuttonWithType:UIButtonTypeCustom];

startButton.frame =CGRectMake(50, 300,100, 50);

startButton.backgroundColor = [UIColorblackColor];

[startButtonaddTarget:selfaction:@selector(startStop)forControlEvents:UIControlEventTouchUpInside];

[startButtonsetTitle:@"开始录音" forState:UIControlStateNormal];

[self.viewaddSubview:startButton];

UIButton * playButton = [UIButtonbuttonWithType:UIButtonTypeCustom];

playButton.frame = CGRectMake(200,300, 100, 50);

playButton.backgroundColor = [UIColorblackColor];

[playButton addTarget:selfaction:@selector(play)forControlEvents:UIControlEventTouchUpInside];

[playButton setTitle:@"开始播放" forState:UIControlStateNormal];

[self.view addSubview:playButton];

self.imageView = [[UIImageViewalloc] initWithFrame:CGRectMake(50,50, 100,100)];

[self.viewaddSubview:self.imageView];

// UILabel * hzLabel = [[UILabel alloc] initWithFrame:CGRectMake(50, 50, 100, 50)];

// hzLabel.text = @"采样频率";

// [self.view addSubview:hzLabel];

// UILabel * voLabel = [[UILabel alloc] initWithFrame:CGRectMake(50, 150, 100, 50)];

// voLabel.text = @"音量";

// [self.view addSubview:voLabel];

// hzTextField = [[UITextField alloc] initWithFrame:CGRectMake(200, 50, 100, 50)];

// hzTextField.borderStyle = UITextBorderStyleRoundedRect;

// hzTextField.text = @"44100.0";

// [self.view addSubview:hzTextField];

// voTextField = [[UITextField alloc] initWithFrame:CGRectMake(200, 150, 100, 50)];

// voTextField.borderStyle = UITextBorderStyleRoundedRect;

// voTextField.text = @"2";

// [self.view addSubview:voTextField];

activity = [[UIActivityIndicatorViewalloc] initWithFrame:CGRectMake(100,400, 50,50)];

activity.backgroundColor = [UIColorredColor];

[self.viewaddSubview:activity];

}

- (void)dealloc

{

// NSFileManager * fm = [NSFileManager defaultManager];

// [fm removeItemAtPath:[recordedTempFile path] error:nil];

// recorder = nil;

}

- (void)startStop

{

if (startOrStopFlag) {

[startButtonsetTitle:@"暂停录音" forState:UIControlStateNormal];

recorder = [[AVAudioRecorderalloc] initWithURL:recordedTempFilesettings:nilerror:nil];

//开启音量检测

recorder.meteringEnabled =YES;

recorder.delegate =self;

//设置定时检测

timer = [NSTimerscheduledTimerWithTimeInterval:0target:selfselector:@selector(detectionVoice)userInfo:nilrepeats:YES];

startOrStopFlag = NO;

[activitystartAnimating];

[recorderprepareToRecord];

[recorder record];

}

else

{

startOrStopFlag = YES;

[activitystopAnimating];

[startButtonsetTitle:@"开始录音" forState:UIControlStateNormal];

[recorder stop];

player = [[AVAudioPlayeralloc] initWithContentsOfURL:recordedTempFileerror:nil];

}

- (void)detectionVoice

{

[recorderupdateMeters];

double lowPassResults = pow(10, (0.05 * [recorderpeakPowerForChannel:0]));

if (0<lowPassResults<=0.06) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_01.png"]];

}else if (0.06<lowPassResults<=0.13) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_02.png"]];

}else if (0.13<lowPassResults<=0.20) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_03.png"]];

}else if (0.20<lowPassResults<=0.27) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_04.png"]];

}else if (0.27<lowPassResults<=0.34) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_05.png"]];

}else if (0.34<lowPassResults<=0.41) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_06.png"]];

}else if (0.41<lowPassResults<=0.48) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_07.png"]];

}else if (0.48<lowPassResults<=0.55) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_08.png"]];

}else if (0.55<lowPassResults<=0.62) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_09.png"]];

}else if (0.62<lowPassResults<=0.69) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_10.png"]];

}else if (0.69<lowPassResults<=0.76) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_11.png"]];

}else if (0.76<lowPassResults<=0.83) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_12.png"]];

}else if (0.83<lowPassResults<=0.9) {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_13.png"]];

}else {

[self.imageViewsetImage:[UIImage imageNamed:@"record_animate_14.png"]];

}

- (void)play

{

[playerprepareToPlay];

[player play];

}

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