1.录音
录音使用的对象是AVAudioRecorder对象,其录音步骤分为一下几个步骤：
(1)初始化一个全局会话AVAudioSession,并设置会话种类:[_session setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError];
(2)//激活全局会话：[_session setActive:YES error:nil];
(3)指定音频存储路径
(4)设置录音相关参数并初始化录音器对象AVAudioRecorder
(5)设置录音缓冲并开始录制:[_recoder prepareToRecord], [_recoder record];
其实现代码如下：
///录音/取消/完成
- (void)recordAction:(UIButton *)sender {
if (sender.tag == 132343 ) {
//取消 删除录制的音频
_timeLabel.text = @"00:00:00";
if (_recordButtons[1].selected) {
_recordButtons[1].selected = NO;
[_timer invalidate];
_timer = nil;
}
NSFileManager *manager = [NSFileManager defaultManager];
if ([manager fileExistsAtPath:_filePath]) {
//删除路径下的录音文件
BOOL isDeleteSucess = [manager removeItemAtPath:_filePath error:nil];
if (isDeleteSucess) {
iToastMsg(@"请重新录制!");
}
} else {
iToastMsg(@"未录制音频!");
}
}else if (sender.tag ==132344 ) {
//录音或者暂停
sender.selected = ! sender.selected;
if (sender.selected) {
iToastMsg(@"开始录音!!!");
//初始化全局会话
_session = [AVAudioSession sharedInstance];
NSError *sessionError;
//设置会话种类
[_session setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError];
//激活全局会话
if (_session) {
[_session setActive:YES error:nil];
}
//时间戳
NSDateFormatter *nameforamt = [NSDateFormatter new];
[nameforamt setDateFormat:kDateFormat_yyyyMdHms];
NSString *dateStr = [ nameforamt stringFromDate:[NSDate date]];
//指定音频存储路径
_filePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject] stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.wav",dateStr]];
DLog(@"path = %@",_filePath);
_recoderUrl = [NSURL fileURLWithPath:_filePath];
//设置录音参数
NSDictionary *recordSetting = [[NSDictionary alloc] initWithObjectsAndKeys:
[NSNumber numberWithFloat: 8000.0],AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatLinearPCM],AVFormatIDKey,
[NSNumber numberWithInt:16],AVLinearPCMBitDepthKey,
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
[NSNumber numberWithInt:AVAudioQualityMax],AVEncoderAudioQualityKey,
nil];
NSError *initError;
//初始化录音器
_recoder = [[AVAudioRecorder alloc] initWithURL:_recoderUrl
settings:recordSetting
error:&initError];
if (_recoder) {
_recoder.meteringEnabled = YES;
//开始录音
[_recoder prepareToRecord];
[_recoder record];
__block NSInteger hour = 0;
__block NSInteger minute = 0;
//定时器计算录音时长
_timer = [NSTimer scheduledTimerWithTimeInterval:1
repeats:YES
block:^(NSTimer * _Nonnull timer) {
_seconds ++;
if (_seconds>60) {
minute ++;
_seconds = 0;
}
if (minute>60) {
minute = 0;
hour ++;
}
NSString *secondstr= [NSString stringWithFormat:@"%@%zd" ,_seconds< 10 ? @"0":@"" ,_seconds];
NSString *minuteStr= [NSString stringWithFormat:@"%@%zd" ,minute< 10 ? @"0":@"" ,minute];
NSString *hourStr= [NSString stringWithFormat:@"%@%zd" ,hour< 10 ? @"0":@"" ,hour];
_timeLabel.text = [NSString stringWithFormat:@"%@:%@:%@",hourStr,minuteStr,secondstr];
}];
[[NSRunLoop currentRunLoop] addTimer:_timer forMode:NSRunLoopCommonModes];
} else {
iToastMsg([initError description]);
}
} else {
iToastMsg(@"停止录音!!!");
if ([_recoder isRecording]) {
[_recoder stop];
}
_totalTimeLabel.text = _timeLabel.text;
NSFileManager *manager = [NSFileManager defaultManager];
//计算文件大小
if ([manager fileExistsAtPath:_filePath]){
NSString *tipStr = [NSString stringWithFormat:@"录了 %@,文件大小为 %.2fMB",_timeLabel.text,[[manager attributesOfItemAtPath:_filePath error:nil] fileSize]/1024.0/1024.0];
iToastMsg(tipStr);
}
//销毁定时器
if ([_timer isValid]) {
[_timer invalidate];
_timer = nil;
}
}
}
}
2.播放
这里实现播放音频的对象是AVAudioPlayer,值的注意的是这里的AVAudioPlayer音频播放器只能播放本地文件，并且是一次性加载所有的音频数据.这里不做网络流媒体的边下载边实现播放的功能,播放本地的音频文件相对简单,其实现代码如下所示:
NSError *error;
_player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:_filePath] error:&error];
//设置代理
_player.delegate = self;
- (void)playOrPause:(UIButton *)sender {
if (!_filePath.length) {
iToastMsg(@"未录制音频！");
return ;
}
if ([_timer isValid]) {
iToastMsg(@"正在录制!");
return;
}
sender.selected = !sender.selected;
if (sender.selected) {
//播放
[_player play];
//定时器计算播放进度
[NSTimer scheduledTimerWithTimeInterval:0.01
repeats:YES
block:^(NSTimer * _Nonnull timer) {
NSTimeInterval currentTime = _player.currentTime;
NSInteger hour = currentTime / 3600;
NSInteger minute = currentTime / 60;
NSInteger second = ((NSInteger) currentTime) %60;
NSString *secondstr= [NSString stringWithFormat:@"%@%zd" ,second< 10 ? @"0":@"" ,second];
NSString *minuteStr= [NSString stringWithFormat:@"%@%zd" ,minute< 10 ? @"0":@"" ,minute];
NSString *hourStr= [NSString stringWithFormat:@"%@%zd" ,hour< 10 ? @"0":@"" ,hour];
_playCurrentTimeLabel.text = [NSString stringWithFormat:@"%@:%@:%@",hourStr,minuteStr,secondstr];
float floatValue = currentTime/_seconds;
[_progressView setProgress:floatValue animated:YES];
}];
} else {
//暂停
if ([_player isPlaying]) {
[_player pause];
}
}
}
//清除缓存
- (void)deleteCaches {
NSString *documentPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];
NSFileManager *manager = [NSFileManager defaultManager];
NSArray *paths = [manager contentsOfDirectoryAtPath:documentPath error:nil];
//删除音频文件
for (int i = 0; i < paths.count; i ++) {
NSString *subPath = paths[i];
if ([subPath rangeOfString:@"wav"].length) {
if ([manager isDeletableFileAtPath:subPath]) {
[manager removeItemAtPath:subPath error:nil];
}
}
}
}
#pragma mark --AVAudioPlayerDelegate
//监听播放完成
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag {
iToastMsg(@"播放完成");
_playButton.selected = NO;
}
其效果如下所示：
录音与播放.png
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作者---------mrChan1234
