/// <summary>
/// 淡出并移除背景
/// </summary>
/// <param name="time">淡出时间</param>
public static Queue <ImageEffect> FadeOutBackground(float time)
{
AnimationBuilder builder = new AnimationBuilder();
UI2DSprite ui = EffectBuilder.backgroundSprite;
return(builder.BeginWith(EffectBuilder.FadeOut(ui, time)).Then(EffectBuilder.RemoveSprite(ui)).Get());
}