我浏览了与此主题相关的各种帖子,但答案并没有真正帮助。我使用this教程来实现音频文件的录制和播放。似乎缺少的是如何保存记录永久。当我退出我的应用程序时,声音文件就在那里,但没有任何内容。我甚至不知道它是保存rocerd还是只是创建文件。 这是一个代码示例:
NSArray *dirPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *docsDir = [dirPaths objectAtIndex:0];
NSString *soundFilePath = [docsDir
stringByAppendingPathComponent:@"tmpSound.caf"];
tempRecFile = [NSURL fileURLWithPath:soundFilePath];
NSDictionary *recSettings = [NSDictionary
dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:AVAudioQualityMin],
AVEncoderAudioQualityKey,
[NSNumber numberWithInt:16],
AVEncoderBitRateKey,
[NSNumber numberWithInt: 2],
AVNumberOfChannelsKey,
[NSNumber numberWithFloat:44100.0],
AVSampleRateKey,
nil];
recorder = [[AVAudioRecorder alloc] initWithURL:tempRecFile settings:recSettings error:nil];
[recorder setDelegate:self];
[recorder prepareToRecord];
[recorder record];
我看到了这个问题的可能解决方案here但是因为我是iOS的新手,所以我没有真正得到它,或者它只是不适合我。
请提供帮助并提供代码示例。我阅读了有关AVFoundation和其他课程的文档,但没有取得积极成果。
SOS:)
更新 这是我的录音方法:
-(IBAction)recording{
//***** METHOD for recording
if(isNotRecording){
isNotRecording = NO;
[recButton setTitle:@"Stop" forState:UIControlStateNormal];
recStateLabel.text = @"Recording";
[recorder setDelegate:self];
[recorder prepareToRecord];
[recorder record];
}
else{
isNotRecording = YES;
[recButton setTitle:@"Rec Begin" forState:UIControlStateNormal];
playButton.hidden = NO;
recStateLabel.text = @"Not recording";
[recorder stop];
}
}
这是我的viewDidLoad:
- (void)viewDidLoad
{
//record sound test code - start
isNotRecording = YES;
//playButton.hidden = YES;
recStateLabel.text = @"Not recording";
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];
[audioSession setActive:YES error:nil];
//record sound test code - END
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
// code for generating the sound file that is to be saved
NSArray *dirPaths;
NSString *docsDir;
dirPaths = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
NSString *soundFilePath = [docsDir
stringByAppendingPathComponent:@"sound.caf"];
NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath];
NSDictionary *recordSettings = [NSDictionary
dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:AVAudioQualityMin],
AVEncoderAudioQualityKey,
[NSNumber numberWithInt:16],
AVEncoderBitRateKey,
[NSNumber numberWithInt: 2],
AVNumberOfChannelsKey,
[NSNumber numberWithFloat:44100.0],
AVSampleRateKey,
nil];
NSError *error = nil;
recorder = [[AVAudioRecorder alloc]
initWithURL:soundFileURL
settings:recordSettings
error:&error];
if (error)
{
NSLog(@"error: %@", [error localizedDescription]);
} else {
[recorder prepareToRecord];
}
}
这是我的playBack方法:
-(IBAction)playback{
//AVAudioPlayer *player = [[AVAudioPlayer alloc] initWithContentsOfURL:temporaryRecFile error:nil];
NSError *error;
// setting the uri of the formed created file
NSArray *dirPaths;
NSString *docsDir;
dirPaths = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = [dirPaths objectAtIndex:0];
NSString *soundFilePath = [docsDir
stringByAppendingPathComponent:@"sound.caf"];
NSURL *soundFileURL = [NSURL fileURLWithPath:soundFilePath];
AVAudioPlayer *player = [[AVAudioPlayer alloc]initWithContentsOfURL:soundFileURL error:&error];
[player setNumberOfLoops:0];
[player prepareToPlay];
[player setVolume:1];
[player play];
NSLog(@"URL je: %@", soundFileURL);
//method 2
if (error)
NSLog(@"Error: %@",
[error localizedDescription]);
else
{
[player play];
if(player.isPlaying==YES)
{
NSLog(@"It's playing");
}
}
}
我告诉你,这清楚地说明了我的所作所为。 有什么建议我可能错了吗?答案 0 :(得分:3)
问题是当你告诉XCode(在viewDidLoad方法中)[recorder prepareToRecord];它摆脱了以前录制的音频文件。消除“if”语句中的那段代码,当您退出并返回应用程序时,将保存您的音频文件。
答案 1 :(得分:2)
您需要停止录制才能永久保存数据:
[recorder stop];
答案 2 :(得分:1)
仅供参考 - " [录音机prepareToRecord]" method创建一个新的音频文件,覆盖以前录制的任何文件。