簡單實現錄音功能
聲明全局成員變量
@property(nonatomic,strong)AVAudioRecorder *recorder ;
@property (nonatomic, strong) AVAudioPlayer * audioPlayer;
@property (nonatomic, strong) CADisplayLink *link;
@property (nonatomic, assign) double slientDuration;
- (CADisplayLink *)link
{
if (!_link) {
self.link = [CADisplayLink displayLinkWithTarget:self selector:@selector(update)];
}
return _link;
}
//開始錄音
- (IBAction)startRecording:(id)sender {
NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingString:@"tesst.caf"];
NSURL *url = [NSURL fileURLWithPath:path];
NSMutableDictionary *setting = [NSMutableDictionary dictionary];
//音頻格式
setting[AVFormatIDKey] = @(kAudioFormatAppleIMA4);
//音頻採樣率
setting[AVSampleRateKey]= @(8000.0);
//音頻通道數
setting[AVNumberOfChannelsKey] = @(1);
//線性音頻的位深度
setting[AVLinearPCMBitDepthKey] = @(8);
// 創建錄音器
AVAudioRecorder *recorder = [[AVAudioRecorder alloc] initWithURL:url settings:setting error:nil];
//允許測量分貝
recorder.meteringEnabled = YES;
//緩衝
[recorder prepareToRecord];
//錄音
[recorder record];
self.recorder = recorder;
}
- (IBAction)stopRecording:(id)sender {
[self.recorder stop];
}
//真機中文件讀取不到 可以在模擬器中取到聲音文件
- (IBAction)playRecording:(id)sender {
//加載音樂文件
NSString *path = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingString:@"tesst.caf"];
// NSURL *url = [[NSBundle mainBundle] URLForResource:path withExtension:nil];
NSData *data = [[NSFileManager defaultManager] contentsAtPath:path];
NSError *error = nil;
_audioPlayer = [[AVAudioPlayer alloc] initWithData:data error:&error];
// _audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error];
NSLog(@"%@", error);
//緩衝
[_audioPlayer prepareToPlay];
[_audioPlayer play];
}