/// <summary>
/// 将指定的<see cref="UILayer"/>移动到分组最高显示优先级。
/// </summary>
/// <param name="layer">图层</param>
internal void BringToFront(UILayer layer)
{
if (layer.Group != this)
{
throw new ArgumentException("layer");
}
if (mLayers.Count <= 1)
{
return;
}
mLayers.Remove(layer);
layer.Order = mLayers.Last().Order + 1;
mLayers.Add(layer);
}
/// <summary>
/// 当<see cref="UILayer"/>创建完毕后调用此方法。
/// </summary>
/// <param name="layer"></param>
protected override void OnAddUILayer(UILayer layer)
{
var canvasLayer = (RectTransformLayer)layer;
canvasLayer.SetParent(GroupTransform);
}
/// <summary>
/// 当<see cref="UILayer"/>创建完毕后调用此方法。
/// </summary>
/// <param name="layer"></param>
protected virtual void OnAddUILayer(UILayer layer)
{
}
/// <summary>
/// 移除分组中指定的<see cref="UILayer"/>。
/// </summary>
/// <param name="layer"></param>
internal void Remove(UILayer layer)
{
mLayers.Remove(layer);
}