AVAudioSession声音很低

Question

由于某种原因，当我在应用程序中播放声音时，我几乎听不到它。知道为什么吗？下面是我用来播放声音的代码。

UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,sizeof (audioRouteOverride),&audioRouteOverride);

[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: nil];

NSString *audioFilePath = [[NSBundle mainBundle] pathForResource:soundToPlay ofType:@"wav"];
NSURL *audioFileURL = [NSURL fileURLWithPath:audioFilePath];
AVAudioPlayer *audioPlayer = [[AVAudioPlayer alloc] initWithContentsOfURL:audioFileURL error:nil];
audioPlayer.volume = 1;
[audioPlayer prepareToPlay];
[audioPlayer play];   

Answer 1

您需要调用 AVAudioSession.sharedInstance().setActive(true)

Answer 2

我将 AudioSession init 从 viewDidLoad 移至 viewDidAppear，声音不再低了。希望这有帮助。