我试图记录用户的声音在后台使用AVAudioRecorder
但每次我得到NO
同时呼吁recordForDuration
方法。 我想补充“音频”,以UIBackgroundModes
但这没有帮助。 顺便说一句,一切工作在前台完美。 我初始化AVAudioRecorder
使用此代码:
NSError* error;
if (![[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryRecord error:&error])
{
NSLog(@"Error while setting audio session category. Code - %d, description - \"%@\".", [error code], [error localizedDescription]);
return;
}
NSURL* outputFileURL = [VKMFileSystemHelper uniqueFileInPath:[[VKMFileSystemHelper subdirectoryInsideLibrary:DIR_AUDIO] path] withExtension:@"m4a"];
NSDictionary* recordSettings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithInt:kAudioFormatMPEG4AAC], AVFormatIDKey,
[NSNumber numberWithInt:AVAudioQualityMin] , AVEncoderAudioQualityKey,
[NSNumber numberWithInt:16] , AVEncoderBitRateKey,
[NSNumber numberWithInt:1] , AVNumberOfChannelsKey,
[NSNumber numberWithFloat:12000.0] , AVSampleRateKey,
nil];
_recorder = [[AVAudioRecorder alloc] initWithURL:outputFileURL settings:recordSettings error:&error];
[_recorder setDelegate:self];
if (error)
{
NSLog(@"Error occured during audio recorder initialization. Error code - %d, description - \"%@\".", [error code], [error localizedDescription]);
}
else
{
NSLog(@"Start recording.");
if ([_recorder recordForDuration:[shedule execLength]])
{
NSLog(@"Record started.");
}
else
{
NSLog(@"Record failed.");
}
}
如何从麦克风从后台记录? 这可能吗?