我正在视频控制器中录制音频(语音备忘录)。这有效。只要用户不关闭视图控制器,我就可以播放录制的音频。
但是,如果用户取消视图控制器并再次打开视图控制器,则初始化AVAudioPlayer会因OSStatus错误1685348671而失败。
我还尝试使用NSData初始化播放器:
NSData *data = [[NSData alloc] initWithContentsOfURL:_outputFileURL];
_player = [[AVAudioPlayer alloc] initWithData:data error:&error2];
,但这不起作用
我试过.caf,跟着每个教程,但不知怎的,我不能让它工作...... 这个错误似乎是指无效文件左右,但我不确定。但是,如果我在管理器中下载应用程序并在我的Mac上打开它,我可以播放它,因此文件本身没有损坏。
这是我的记录方法:
- (IBAction)recordPauseTapped:(id)sender {
// Stop the audio player before recording
if (_player.playing) {
[_player stop];
}
if (!_recorder.recording) {
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setActive:YES error:nil];
// Start recording
[_recorder record];
[recordPauseButton setTitle:@"Pause" forState:UIControlStateNormal];
} else {
// Pause recording
[_recorder pause];
[recordPauseButton setTitle:@"Aufnahme" forState:UIControlStateNormal];
}
[stopButton setEnabled:YES];
[playButton setEnabled:NO];
}
录制工作正常,文件存在于Documents目录中。
这是我的播放方法,如果文件是在之前录制的,并且没有用户离开视图控制器,则该方法有效:
- (IBAction)playTapped:(id)sender {
if (!_recorder.recording){
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setActive:YES error:nil];
NSError *error;
BOOL success = [audioSession overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker error:&error];
if(!success)
{
NSLog(@"error doing outputaudioportoverride - %@", [error localizedDescription]);
}
NSError *error2;
NSLog(@"_outputFileURL: %@", _outputFileURL);
_player = [[AVAudioPlayer alloc] initWithContentsOfURL:_outputFileURL error:&error2];
if (error2) {
NSLog(@"error initialising player - %@", [error2 localizedDescription]);
}
[_player setDelegate:self];
[_player play];
}
}
这是我的viewDidLoad:
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationController.navigationBar.translucent = NO;
[stopButton setEnabled:NO];
// Set the audio file
if ([_audioFileName isEqualToString:@""]) {
NSString *guid = [[NSUUID new] UUIDString];
_audioFileName = [NSString stringWithFormat:@"audio-%@.m4a", guid];
[playButton setEnabled:NO];
} else {
[playButton setEnabled:YES];
}
NSLog(@"_audioFileName: %@", _audioFileName);
NSArray *pathComponents = [NSArray arrayWithObjects:
[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject],
_audioFileName,
nil];
_outputFileURL = [NSURL fileURLWithPathComponents:pathComponents];
// Setup audio session
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];
[session setActive:YES error:nil];
// Define the recorder setting
NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue:[NSNumber numberWithInt:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 2] forKey:AVNumberOfChannelsKey];
// Initiate and prepare the recorder
_recorder = [[AVAudioRecorder alloc] initWithURL:_outputFileURL settings:recordSetting error:nil];
_recorder.delegate = self;
_recorder.meteringEnabled = YES;
[_recorder prepareToRecord];
}
答案 0 :(得分:1)
你的问题是你有[_recorder prepareToRecord];进入viewLoad,意思是 每次加载视图控制器时都会被覆盖。 如果你不希望这种行为,你应该删除这一行,并把它放在开头 以recordPauseTapped为例。 这应该可以解决你的问题。