本文将涉及到以下内容：
一、搭建长按录音UI效果；
二、使用AVAudioRecorder录音；
三、使用AVAudioPlayer播放，并添加播放动画；
四、使用lame将caf音频转化为mp3;
五、将mp3 转化为 base64编码；
六、查看录音文件大小；
七、删除语音文件；
--------------------------
一、搭建长按录音UI效果；
页面样式效果如下：
其中：
1、录音按钮是由两个UIImageView实现，监听手势方法，长按第一层UIImageView时，第二层开始旋转动画；
这里我想过用UIButton来实现点击录音效果，其中UIControlEventTouchDown可以检测点击下去的效果，UIControlEventTouchUpInside可以检测点击后起来的效果，但是测试点击下去后，没有直接起来，而是将手指移动到其他位置，导致录音无法关闭，所以，还是使用了长按手势来监听。
2、其他控件比较简单。
核心代码
1、长按启动录音；
- (UIImageView *)recordBtn{
if (!_recordBtn) {
_recordBtn = [[UIImageView alloc]init];
_recordBtn.backgroundColor = [UIColor clearColor];
[_recordBtn setImage:[UIImage imageNamed:@"record_norm"]];
_recordBtn.userInteractionEnabled = YES;
//方便添加长按手势 }
return _recordBtn;
}
self.recordBtn.frame = CGRectMake((kSCREEN_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(recordNotice) forControlEvents:UIControlEventTouchDown];
// [self.recordBtn addTarget:self action:@selector(stopNotice) forControlEvents:UIControlEventTouchUpInside];
//实例化长按手势监听 UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleTableviewCellLongPressed:)];
//代理 longPress.delegate = self;
longPress.minimumPressDuration = 0.5;
[self.recordBtn addGestureRecognizer:longPress];
//长按事件的实现方法- (void) handleTableviewCellLongPressed:(UILongPressGestureRecognizer *)gestureRecognizer {
if (gestureRecognizer.state == UIGestureRecognizerStateBegan) {
NSLog(@"UIGestureRecognizerStateBegan");
[self startRecordNotice];
}
if (gestureRecognizer.state == UIGestureRecognizerStateChanged) {
}
if (gestureRecognizer.state == UIGestureRecognizerStateEnded) {
NSLog(@"UIGestureRecognizerStateEnded");
[self stopRecordNotice];
}
}
2、录音过程中，录音外圈旋转效果
1）初始化
-(UIImageView *)rotateImgView{
if (!_rotateImgView) {
_rotateImgView = [[UIImageView alloc]init];
_rotateImgView.image = [UIImage imageNamed:@"rcirle_norm"];
_rotateImgView.frame = CGRectMake(0, 0, btnH, btnH);
_rotateImgView.center = self.recordBtn.center;
}
return _rotateImgView;
}
2）动画设置
// 执行动画- (void)starAnimalWithTime:(CFTimeInterval)time //time为旋转一周的时间{
self.rotateImgView.image = [UIImage imageNamed:@"rcirle_high"];
self.rotationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
self.rotationAnimation.toValue = [NSNumber numberWithFloat: M_PI * 2.0 ];
self.rotationAnimation.duration = time;
self.rotationAnimation.cumulative = YES;
self.rotationAnimation.repeatCount = HUGE_VALF;
[self.rotateImgView.layer addAnimation:self.rotationAnimation forKey:@"rotationAnimation"];
}
3、播放时的动画效果
1）动画设置
#pragma mark - 动画效果- (void)pictureChangeAnimationSetting{
NSArray *picArray = @[[UIImage imageNamed:@"voice1"], [UIImage imageNamed:@"voice2"], [UIImage imageNamed:@"voice3"],];
// self.imageView.image = [UIImage imageNamed:@"voice1"];
//imageView的动画图片是数组images self.voiceView.animationImages = picArray;
//按照原始比例缩放图片，保持纵横比 self.voiceView.contentMode = UIViewContentModeScaleAspectFit;
//切换动作的时间3秒，来控制图像显示的速度有多快， self.voiceView.animationDuration = 1;
//动画的重复次数，想让它无限循环就赋成0 self.voiceView.animationRepeatCount = 0;
}
2）开启动画
[self.voiceView startAnimating];
3）关闭动画
[self.voiceView.layer removeAllAnimations];
self.voiceView.image = [UIImage imageNamed:@"voice3"];
二、使用AVAudioRecorder录音；
#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YES if (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;
}
- (void)startRecordNotice{
if ([self.audioRecorder isRecording]) {
[self.audioRecorder stop];
}
[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 ;
//0.1s self.timer1 = [NSTimer scheduledTimerWithTimeInterval:timeInterval target:self selector:@selector(changeRecordTime) userInfo:nil repeats:YES];
[self.timer1 fire];
}
[self starAnimalWithTime:2.0];
}
- (void)stopRecordNotice{
NSLog(@"----------结束录音----------");
[self.audioRecorder stop];
[self.timer1 invalidate];
}
三、使用AVAudioPlayer播放；
这段代码写的不好，暂不分享，欢迎大家分享给我
四、使用lame将caf音频转化为mp3;
导入lame框架，import进来头文件即可使用，如果导出后是噪音，需要检查录音的设置
#pragma mark - caf转mp3- (void)audio_PCMtoMP3{
@try {
int read, write;
FILE *pcm = fopen([self.cafPathStr 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([self.mp3PathStr 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 {
NSLog(@"MP3生成成功: %@",self.mp3PathStr);
}
}
五、将mp3 转化为 base64编码；
#pragma mark - 文件转换// 二进制文件转为base64的字符串- (NSString *)Base64StrWithMp3Data:(NSData *)data{
if (!data) {
NSLog(@"Mp3Data 不能为空");
return nil;
}
// NSString *str = [data base64EncodedStringWithOptions:NSDataBase64Encoding64CharacterLineLength];
NSString *str = [data base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed];
return str;
}
// base64的字符串转化为二进制文件- (NSData *)Mp3DataWithBase64Str:(NSString *)str{
if (str.length ==0) {
NSLog(@"Mp3DataWithBase64Str:Base64Str 不能为空");
return nil;
}
NSData *data = [[NSData alloc] initWithBase64EncodedString:str options:NSDataBase64DecodingIgnoreUnknownCharacters];
NSLog(@"Mp3DataWithBase64Str:转换成功");
return data;
}
六、查看录音文件大小；
//单个文件的大小,返回单位为K- (long long) fileSizeAtPath:(NSString*)filePath{
NSFileManager* manager = [NSFileManager defaultManager];
if ([manager fileExistsAtPath:filePath]){
return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
}
return 0;
}
调用
//计算文件大小 long long fileSize = [self fileSizeAtPath:self.mp3PathStr]/1024.0;
NSString *fileSizeStr = [NSString stringWithFormat:@"%lld",fileSize];
七、删除(语音)文件；
-(void)deleteOldRecordFileAtPath:(NSString *)pathStr{
NSFileManager* fileManager=[NSFileManager defaultManager];
BOOL blHave=[[NSFileManager defaultManager] fileExistsAtPath:pathStr];
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");
}
}
}
