/// <summary>
/// 淡出所有（包括对话框）【需要与RemoveAll连用】
/// </summary>
/// <param name="fadeout">淡出时间，默认0.3s</param>
public EffectPiece FadeoutAll(float fadeout = 0.3f)
{
Queue <NewImageEffect> effects = new Queue <NewImageEffect>();
effects.Enqueue(NewEffectBuilder.FadeOutAll(fadeout));
return(new EffectPiece(id++, effects));
}
