/// <summary>
/// 调用bgAudioSource的Play播放音频文件,,直接使用已经预加载的AB资源
/// </summary>
/// <param name="volumeScale">音量缩放比</param>
public static void PlayBg(string audioABName, float volumeScale = 1.0f)
{
KSound.PlayBg(KAssetBundle.GetObject <AudioClip>(audioABName), volumeScale);
}