效果如图
主要代码如下
#import "ViewController.h"#import#import "lame.h"
//用宏来定义需要用到的变量 运算符
#define SCREEN_WIDTH ([UIScreen mainScreen].bounds.size.width)
#define SCREEN_HEIGHT ([UIScreen mainScreen].bounds.size.height)
#define NAVBAR_HEIGHT 40
#define TITLE_X (SCREEN_WIDTH/2-SCREEN_WIDTH/10)
#define TITLE_Y (1.5*NAVBAR_HEIGHT)
#define TITLE_WIDTH (SCREEN_WIDTH/5)
#define TITLE_HEIGHT NAVBAR_HEIGHT
#define RECORDBAR_X (SCREEN_WIDTH/2-SCREEN_WIDTH/4)
#define RECORDBAR_Y (TITLE_Y+TITLE_HEIGHT+NAVBAR_HEIGHT/2)
#define RECORDBAR_WIDTH (SCREEN_WIDTH/2)
#define TIME_X (SCREEN_WIDTH/2-SCREEN_WIDTH/8)
#define TIME_Y (RECORDBAR_Y+NAVBAR_HEIGHT)
#define TIME_WIDTH (SCREEN_WIDTH/4)
#define TIME_HEIGHT NAVBAR_HEIGHT
#define RECORDBUTTON_X (SCREEN_WIDTH/2-SCREEN_WIDTH/6)
#define RECORDBUTTON_Y (TIME_Y+TIME_HEIGHT+NAVBAR_HEIGHT/2)
#define RECORDBUTTON_WIDTH (SCREEN_WIDTH/3)
#define RECORDBUTTON_HEIGHT RECORDBUTTON_WIDTH
#define PLAYBUTTON_X (SCREEN_WIDTH/2-SCREEN_WIDTH/8)
#define PLAYBUTTON_Y (TIME_Y+2*TIME_HEIGHT)
#define PLAYBUTTON_WIDTH SCREEN_WIDTH/4
#define PLAYBUTTON_HEIGHT PLAYBUTTON_WIDTH
#define RECORE_BUTTON_TAG 1010
#define NEW_PLAY_BUTTON_TAG 1011
#define PAUSE_PLAY_BUTTON_TAG 1012
#define FINISH_BUTTON_TAG 1013
#define RECORDAGAIN_BUTTON_TAG 1014
#define PAUSE_BUTTON_TAG 1015
@interface ViewController ()
@end
@implementation ViewController
{
UILabel* recordTitleLabel; //记录标题标签
UISlider* progressView; //进度条
UILabel* timeLabel; //时间表
UIButton* recordButton; //录音按钮
UILabel* recordLabel;
NSTimer* timer;
int recordTime; //录音时间
int playTime; //播放时间
int playDuration; //播放持续时间
int second;
int minute;
UIButton* playButton; //播放按钮
UIButton* finishButton; //完成按钮
UIButton* pauseButton; //暂停按钮
UIButton* recordAgainButton; //重新录制按钮
UILabel* playLabel;
UILabel* finishLabel;
UILabel* pauseLabel;
UILabel* recordAgainLabel;
AVAudioRecorder *audioRecorder;
AVAudioPlayer *audioPlayer;
AVAudioSession * audioSession;
NSURL* recordUrl;
NSURL* mp3FilePath;
NSURL* audioFileSavePath;
}
- (void)viewDidLoad {
[self initializeUI];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)initializeUI {
playButton = [[UIButton alloc] initWithFrame:CGRectMake(PLAYBUTTON_X, PLAYBUTTON_Y, PLAYBUTTON_WIDTH, PLAYBUTTON_HEIGHT)];
[playButton setImage:[UIImage imageNamed:@"play_button.png"] forState:UIControlStateNormal];
playButton.tag = NEW_PLAY_BUTTON_TAG;
[playButton addTarget:self action:@selector(clickOnButton:) forControlEvents:UIControlEventTouchUpInside];
playLabel = [[UILabel alloc] initWithFrame:CGRectMake(PLAYBUTTON_X, PLAYBUTTON_Y+PLAYBUTTON_HEIGHT, PLAYBUTTON_WIDTH, NAVBAR_HEIGHT)];
[playLabel setText:@"播放"];
[playLabel setTextAlignment:NSTextAlignmentCenter];
pauseButton = [[UIButton alloc] initWithFrame:CGRectMake(PLAYBUTTON_X, PLAYBUTTON_Y, PLAYBUTTON_WIDTH, PLAYBUTTON_HEIGHT)];
[pauseButton setImage:[UIImage imageNamed:@"pause_button.png"] forState:UIControlStateNormal];
pauseButton.tag = PAUSE_BUTTON_TAG;
[pauseButton addTarget:self action:@selector(clickOnButton:) forControlEvents:UIControlEventTouchUpInside];
pauseLabel = [[UILabel alloc] initWithFrame:CGRectMake(PLAYBUTTON_X, PLAYBUTTON_Y+PLAYBUTTON_HEIGHT, PLAYBUTTON_WIDTH, NAVBAR_HEIGHT)];
[pauseLabel setText:@"暂停"];
[pauseLabel setTextAlignment:NSTextAlignmentCenter];
finishButton = [[UIButton alloc] initWithFrame:CGRectMake(PLAYBUTTON_X-PLAYBUTTON_WIDTH-10, PLAYBUTTON_Y, PLAYBUTTON_WIDTH, PLAYBUTTON_HEIGHT)];
[finishButton setImage:[UIImage imageNamed:@"finish_button.png"] forState:UIControlStateNormal];
finishButton.tag = FINISH_BUTTON_TAG;
[finishButton addTarget:self action:@selector(clickOnButton:) forControlEvents:UIControlEventTouchUpInside];
finishLabel = [[UILabel alloc] initWithFrame:CGRectMake(PLAYBUTTON_X-PLAYBUTTON_WIDTH-10, PLAYBUTTON_Y+PLAYBUTTON_HEIGHT, PLAYBUTTON_WIDTH, NAVBAR_HEIGHT)];
[finishLabel setText:@"完成"];
[finishLabel setTextAlignment:NSTextAlignmentCenter];
recordAgainButton = [[UIButton alloc] initWithFrame:CGRectMake(PLAYBUTTON_X+PLAYBUTTON_WIDTH+10, PLAYBUTTON_Y, PLAYBUTTON_WIDTH, PLAYBUTTON_HEIGHT)];
[recordAgainButton setImage:[UIImage imageNamed:@"record_again_button.png"] forState:UIControlStateNormal];
recordAgainButton.tag = RECORDAGAIN_BUTTON_TAG;
[recordAgainButton addTarget:self action:@selector(clickOnButton:) forControlEvents:UIControlEventTouchUpInside];
recordAgainLabel = [[UILabel alloc] initWithFrame:CGRectMake(PLAYBUTTON_X+PLAYBUTTON_WIDTH+10, PLAYBUTTON_Y+PLAYBUTTON_HEIGHT, PLAYBUTTON_WIDTH, NAVBAR_HEIGHT)];
[recordAgainLabel setText:@"重新录制"];
[recordAgainLabel setTextAlignment:NSTextAlignmentCenter];
recordTitleLabel = [[UILabel alloc] initWithFrame:CGRectMake(TITLE_X, TITLE_Y, SCREEN_WIDTH, TITLE_HEIGHT)];
[recordTitleLabel setText:@"录制语音"];
progressView = [[UISlider alloc] initWithFrame:CGRectMake(RECORDBAR_X, RECORDBAR_Y, RECORDBAR_WIDTH, 20)];
[progressView setThumbImage:[UIImage imageNamed:@"one.png"] forState:UIControlStateNormal];
progressView.value = 0;
progressView.userInteractionEnabled = NO;
timeLabel = [[UILabel alloc] initWithFrame:CGRectMake(TIME_X, TIME_Y, TIME_WIDTH, TIME_HEIGHT)];
[timeLabel setText:@"00:00"];
[timeLabel setFont:[UIFont systemFontOfSize:32]];
[timeLabel setTextColor:[UIColor blackColor]];
recordButton = [[UIButton alloc] initWithFrame:CGRectMake(RECORDBUTTON_X, RECORDBUTTON_Y, RECORDBUTTON_WIDTH, RECORDBUTTON_HEIGHT)];
recordButton.tag = RECORE_BUTTON_TAG;
[recordButton addTarget:self action:@selector(clickOnButton:) forControlEvents:UIControlEventTouchUpInside];
[recordButton setImage:[UIImage imageNamed:@"record_button.png"] forState:UIControlStateNormal];
recordLabel = [[UILabel alloc] initWithFrame:CGRectMake(RECORDBUTTON_X, RECORDBUTTON_Y+RECORDBUTTON_HEIGHT, RECORDBUTTON_WIDTH, NAVBAR_HEIGHT/2)];
[recordLabel setText:@"点击开始"];
[recordLabel setTextAlignment:NSTextAlignmentCenter];
//录音设置
NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc] init];
//设置录音格式 AVFormatIDKey==kAudioFormatLinearPCM
[recordSetting setValue:[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey];
//设置录音采样率(Hz) 如：AVSampleRateKey==8000/44100/96000（影响音频的质量）, 采样率必须要设为11025才能使转化成mp3格式后不会失真
[recordSetting setValue:[NSNumber numberWithFloat:11025.0] forKey:AVSampleRateKey];
//录音通道数 1 或 2 ，要转换成mp3格式必须为双通道
[recordSetting setValue:[NSNumber numberWithInt:2] forKey:AVNumberOfChannelsKey];
//线性采样位数 8、16、24、32
[recordSetting setValue:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];
//录音的质量
[recordSetting setValue:[NSNumber numberWithInt:AVAudioQualityHigh] forKey:AVEncoderAudioQualityKey];
//存储录音文件
recordUrl = [NSURL URLWithString:[NSTemporaryDirectory() stringByAppendingString:@"selfRecord.caf"]];
//初始化
audioRecorder = [[AVAudioRecorder alloc] initWithURL:recordUrl settings:recordSetting error:nil];
//开启音量检测
audioRecorder.meteringEnabled = YES;
audioRecorder.delegate = self;
[self.view addSubview:recordTitleLabel];
[self.view addSubview:progressView];
[self.view addSubview:timeLabel];
[self.view addSubview:recordButton];
[self.view addSubview:recordLabel];
}
- (void)transformCAFToMP3 {
mp3FilePath = [NSURL URLWithString:[NSTemporaryDirectory() stringByAppendingString:@"myselfRecord.mp3"]];
@try {
int read, write;
FILE *pcm = fopen([[recordUrl absoluteString] cStringUsingEncoding:1], "rb"); //source 被转换的音频文件位置
fseek(pcm, 4*1024, SEEK_CUR); //skip file header
FILE *mp3 = fopen([[mp3FilePath absoluteString] cStringUsingEncoding:1], "wb"); //output 输出生成的Mp3文件位置
const int PCM_SIZE = 8192;
const int MP3_SIZE = 8192;
short int pcm_buffer[PCM_SIZE*2];
unsigned char mp3_buffer[MP3_SIZE];
lame_t lame = lame_init();
lame_set_in_samplerate(lame, 11025.0);
lame_set_VBR(lame, vbr_default);
lame_init_params(lame);
do {
read = fread(pcm_buffer, 2*sizeof(short int), PCM_SIZE, pcm);
if (read == 0)
write = lame_encode_flush(lame, mp3_buffer, MP3_SIZE);
else
write = lame_encode_buffer_interleaved(lame, pcm_buffer, read, mp3_buffer, MP3_SIZE);
fwrite(mp3_buffer, write, 1, mp3);
} while (read != 0);
lame_close(lame);
fclose(mp3);
fclose(pcm);
}
@catch (NSException *exception) {
NSLog(@"%@",[exception description]);
}
@finally {
audioFileSavePath = mp3FilePath;
NSLog(@"MP3生成成功: %@",audioFileSavePath);
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"mp3转化成功！" message:nil delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
[alert show];
}
}
- (void)clickOnButton:(UIButton*)sender {
audioSession = [AVAudioSession sharedInstance];//得到AVAudioSession单例对象
switch (sender.tag) {
case RECORE_BUTTON_TAG:{
if (![audioRecorder isRecording]) {
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];//设置类别,表示该应用同时支持播放和录音
[audioSession setActive:YES error:nil];//启动音频会话管理,此时会阻断后台音乐的播放.
[audioRecorder prepareToRecord];
[audioRecorder peakPowerForChannel:0.0];
[audioRecorder record];
recordTime = 0;
[self recordTimeStart];
[recordButton setImage:[UIImage imageNamed:@"recording_button.png"] forState:UIControlStateNormal];
[recordLabel setText:@"点击结束"];
}
else{
[audioRecorder stop]; //录音停止
[audioSession setActive:NO error:nil]; //一定要在录音停止以后再关闭音频会话管理（否则会报错），此时会延续后台音乐播放
[timer invalidate]; //timer失效
[timeLabel setText:@"00:00"]; //时间显示复位
[progressView setValue:0 animated:YES]; //进度条复位
[recordButton removeFromSuperview];
[recordLabel removeFromSuperview];
[self.view addSubview:playButton];
[self.view addSubview:finishButton];
[self.view addSubview:recordAgainButton];
[self.view addSubview:playLabel];
[self.view addSubview:finishLabel];
[self.view addSubview:recordAgainLabel];
}
}
break;
case NEW_PLAY_BUTTON_TAG:{
[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
[audioSession setActive:YES error:nil];
if (mp3FilePath != nil) {
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:mp3FilePath error:nil];
}
else if (recordUrl != nil){
audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:recordUrl error:nil];
}
[audioPlayer prepareToPlay];
audioPlayer.volume = 1;
[audioPlayer play];
[playButton removeFromSuperview];
[playLabel removeFromSuperview];
[self.view addSubview:pauseButton];
[self.view addSubview:pauseLabel];
playDuration = (int)audioPlayer.duration;
NSLog(@"音频时长为：%i",playDuration);
playTime = 0;
[self audioPlayTimeStart];
}
break;
case PAUSE_PLAY_BUTTON_TAG:{
[audioSession setActive:YES error:nil];
[audioPlayer play];
[playButton removeFromSuperview];
[playLabel removeFromSuperview];
[self.view addSubview:pauseButton];
[self.view addSubview:pauseLabel];
}
break;
case PAUSE_BUTTON_TAG:{
[audioPlayer pause];
[audioSession setActive:NO error:nil];
playButton.tag = PAUSE_PLAY_BUTTON_TAG;
[pauseButton removeFromSuperview];
[pauseLabel removeFromSuperview];
[self.view addSubview:playButton];
[self.view addSubview:playLabel];
}
break;
case FINISH_BUTTON_TAG:{
[self transformCAFToMP3];
}
break;
case RECORDAGAIN_BUTTON_TAG:{
[audioPlayer stop];
[audioRecorder stop];
[audioSession setActive:NO error:nil];
[timer invalidate];
progressView.value = 0;
[timeLabel setText:@"00:00"];
recordTime = 0;
playTime = 0;
[playButton removeFromSuperview];
[pauseButton removeFromSuperview];
[finishButton removeFromSuperview];
[recordAgainButton removeFromSuperview];
[playLabel removeFromSuperview];
[pauseLabel removeFromSuperview];
[finishLabel removeFromSuperview];
[recordAgainLabel removeFromSuperview];
[self.view addSubview:recordButton];
[self.view addSubview:recordLabel];
[recordButton setImage:[UIImage imageNamed:@"record_button.png"] forState:UIControlStateNormal];
[recordLabel setText:@"点击开始"];
}
break;
default:
break;
}
}
- (void)recordTimeStart {
timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(recordTimeTick) userInfo:nil repeats:YES];
}
- (void)recordTimeTick {
recordTime += 1;
[progressView setValue:(float)recordTime/30.0 animated:YES];
if (recordTime == 30) {
recordTime = 0;
[audioRecorder stop];
[[AVAudioSession sharedInstance] setActive:NO error:nil];
[timer invalidate];
[timeLabel setText:@"00:00"];
[progressView setValue:0.0 animated:YES];
[recordButton removeFromSuperview];
[recordLabel removeFromSuperview];
[self.view addSubview:playButton];
[self.view addSubview:finishButton];
[self.view addSubview:recordAgainButton];
[self.view addSubview:playLabel];
[self.view addSubview:finishLabel];
[self.view addSubview:recordAgainLabel];
return;
}
[self updateAudioRecordTime];
}
- (void)updateAudioRecordTime {
minute = recordTime/60.0;
second = recordTime-minute*60;
[timeLabel setText:[NSString stringWithFormat:@"%02d:%02d",minute,second]];
}
- (void)audioPlayTimeStart {
timer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(playTimeTick) userInfo:nil repeats:YES];
}
- (void)playTimeTick {
if (playDuration == playTime) {
playTime = 0;
[audioPlayer stop];
[[AVAudioSession sharedInstance] setActive:NO error:nil];
[pauseButton removeFromSuperview];
[pauseLabel removeFromSuperview];
[self.view addSubview:playButton];
[self.view addSubview:playLabel];
playButton.tag = NEW_PLAY_BUTTON_TAG;
[timeLabel setText:@"00:00"];
[timer invalidate];
progressView.value = 0;
return;
}
if (![audioPlayer isPlaying]) {
return;
}
playTime += 1;
[progressView setValue:(float)playTime/(float)playDuration animated:YES];
[self updateAudioPlayTime];
}
- (void)updateAudioPlayTime {
minute = playTime/60.0;
second = playTime-minute*60;
[timeLabel setText:[NSString stringWithFormat:@"%02d:%02d",minute,second]];
}
//AVAudioRecorderDelegate方法
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag {
[audioSession setActive:NO error:nil];
playTime = 0;
[pauseButton removeFromSuperview];
[pauseLabel removeFromSuperview];
[self.view addSubview:playButton];
[self.view addSubview:playLabel];
playButton.tag = NEW_PLAY_BUTTON_TAG;
[timeLabel setText:@"00:00"];
[timer invalidate];
progressView.value = 0;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
注意要开启麦克风权限，如果模拟器可以用真机却不可以，将Enable Bitcode 关闭就可以了。
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