Question

我已经能够将我的音频路由到speakerPhone，但它仍然无法以尽可能大的音量播放。我已经尝试了[audioAlert setVolume：1.0]并且它仍然保持在用户当前设置的音量上。如果有人知道我做错了什么，我会非常感激。

这是我的代码：

AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:NULL];

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

    NSURL* soundUrl = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"HsTR_soundEFX_2-1" ofType:@"mp3"]];
   audioAlert= [[AVAudioPlayer alloc] initWithContentsOfURL:soundUrl error:nil];
    audioAlert.delegate = self;
    [audioAlert setVolume:1.0];
    [audioAlert prepareToPlay];
    [audioAlert play];

感谢PaulPerry！

现在已解决：

我还添加了一些额外内容，并使用以下代码将其设置回上一卷：

 AVAudioSession *audioSession = [AVAudioSession sharedInstance];
    [audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error:NULL];

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

    NSURL* soundUrl = [NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"HsTR_soundEFX_2-1" ofType:@"mp3"]];
   audioAlert= [[AVAudioPlayer alloc] initWithContentsOfURL:soundUrl error:nil];
    audioAlert.delegate = self;
    [audioAlert prepareToPlay];
    float maxVolume = 1.0;
    float currentVolume=[MPMusicPlayerController applicationMusicPlayer].volume;
    [[MPMusicPlayerController applicationMusicPlayer] setVolume:maxVolume];
    [audioAlert play];
   //set up timer to wait until audioAlert is finished playing,
   // and then call the line below to set the volume back to it's original setting
    [[MPMusicPlayerController applicationMusicPlayer]setVolume:currentVolume];

Answer 1

这会将整个系统的音量重置为最大值。

浮动体积= 1.0; [[MPMusicPlayerController applicationMusicPlayer] setVolume：volume];

Answer 2

你首先将它初始化为0，然后在[audioAlert prepareToPlay]将其重新设置为1之后：

[audioAlert prepareToPlay]
[audioAlert setVolume:1.0]

播放最大的speakerPhone音量，然后使用AVAudioPlayer --- IOS重置为之前的音量

2 个答案: