private static void MarkLayoutRootForRebuild(RectTransform controller)
{
if (!(controller == null))
{
LayoutRebuilder layoutRebuilder = LayoutRebuilder.s_Rebuilders.Get();
layoutRebuilder.Initialize(controller);
if (!CanvasUpdateRegistry.TryRegisterCanvasElementForLayoutRebuild(layoutRebuilder))
{
LayoutRebuilder.s_Rebuilders.Release(layoutRebuilder);
}
}
}
private static void MarkLayoutRootForRebuild(RectTransform controller)
{
if (controller == null)
{
return;
}
var rebuilder = s_Rebuilders.Get();
rebuilder.Initialize(controller);
if (!CanvasUpdateRegistry.TryRegisterCanvasElementForLayoutRebuild(rebuilder))
{
s_Rebuilders.Release(rebuilder);
}
}
private static void MarkLayoutRootForRebuild(RectTransform controller)
{
if ((UnityEngine.Object)controller == (UnityEngine.Object)null)
{
return;
}
LayoutRebuilder element = LayoutRebuilder.s_Rebuilders.Get();
element.Initialize(controller);
if (CanvasUpdateRegistry.TryRegisterCanvasElementForLayoutRebuild((ICanvasElement)element))
{
return;
}
LayoutRebuilder.s_Rebuilders.Release(element);
}
/// <summary>
/// 标记根节点重新布局
/// </summary>
/// <param name="controller"></param>
private static void MarkLayoutRootForRebuild(RectTransform controller)
{
if (controller == null)
{
return;
}
var rebuilder = s_Rebuilders.Get();
rebuilder.Initialize(controller);
//如果注册rebuild队列中已经包含了这个gameobject，就直接进行释放回收
//不包含的话，就注册进去，暂时不回收
// 19/5 2020 Image 源码学习
//这里注册的到rebuild队列的对象类型为继承自ICanvasElement的LayoutRebuilder
//主要是受s_rebuilders的影响,这样在CanvasUpdateRegistry中进行layoutRebuid的时候调用的就是LayoutRebuilder重写的rebuild方法了
//TryRegisterCanvasElementForLayoutRebuild这个方法使用了多态的概念
if (!CanvasUpdateRegistry.TryRegisterCanvasElementForLayoutRebuild(rebuilder))
{
s_Rebuilders.Release(rebuilder);
}
}
