我正在创建一个音频文件并播放它。这不适用于模拟器和 itouch。我不知道我在编码中缺少什么。
创建音频文件：
[audioSession setCategory :AVAudioSessionCategoryRecord error:&err];
if(err){
NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
return;
}
[audioSession setActive:YES error:&err];
err = nil;
if(err){
NSLog(@"audioSession: %@ %d %@", [err domain], [err code], [[err userInfo] description]);
return;
}
NSMutableDictionary* recordSetting = [[NSMutableDictionary alloc] init];
[recordSetting setValue :[NSNumber numberWithInt:kAudioFormatAppleIMA4] forKey:AVFormatIDKey];
[recordSetting setValue:[NSNumber numberWithFloat:16000.0] forKey:AVSampleRateKey];
[recordSetting setValue:[NSNumber numberWithInt: 1] forKey:AVNumberOfChannelsKey];
///****
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory , NSUserDomainMask, YES);
NSString* documentsDir = [paths objectAtIndex:0];
recordedTmpFile = [NSURL fileURLWithPath:[documentsDir stringByAppendingPathComponent: [NSString stringWithFormat: @"%.0f.%@", [NSDate timeIntervalSinceReferenceDate] * 1000.0, @"caf"]]];
///****
NSLog(@"Using File called: %@",recordedTmpFile);
recorder = [[ AVAudioRecorder alloc] initWithURL:recordedTmpFile settings:recordSetting error:&error];
AudioServicesCreateSystemSoundID((CFURLRef)recordedTmpFile, &_pewPewSound);
[recorder setDelegate:self];
[recorder prepareToRecord];
[recorder record];
...现在播放音频文件：
AVAudioSession *audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];
AVAudioPlayer * audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:recordedTmpFile error:&error];
[audioPlayer setDelegate:self];
[audioPlayer prepareToPlay];
//[audioPlayer play];
audioPlayer.numberOfLoops = 0;
if (audioPlayer == nil)
NSLog([error description]);
else
[audioPlayer play];
AudioServicesPlaySystemSound(_pewPewSound);