diff options
Diffstat (limited to 'Assets/uGUI-2017.1/UnityEngine.UI')
4 files changed, 60 insertions, 28 deletions
diff --git a/Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/UIBehaviour.cs b/Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/UIBehaviour.cs index 198f48e..fa24cff 100644 --- a/Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/UIBehaviour.cs +++ b/Assets/uGUI-2017.1/UnityEngine.UI/EventSystem/UIBehaviour.cs @@ -2,7 +2,7 @@ namespace UnityEngine.EventSystems { public abstract class UIBehaviour : MonoBehaviour {
-#region Monobehaviour共有生命周期 +#region MonoBehaviour共有生命周期 protected virtual void Awake() {} @@ -19,7 +19,15 @@ namespace UnityEngine.EventSystems protected virtual void OnDestroy() {}
-#endregion + // 父节点（包括非直接父节点的祖先节点）在hierachy中的父子层级改变前调用
+ protected virtual void OnBeforeTransformParentChanged() + { } + + // 父节点（包括非直接父节点的祖先节点）在hierachy中的父子层级改变完调用 + protected virtual void OnTransformParentChanged() + { }
+
+#endregion public virtual bool IsActive() { @@ -36,18 +44,6 @@ namespace UnityEngine.EventSystems {}
#endif -#region Monobehaviour回调函数 -
- // 父节点（包括非直接父节点的祖先节点）在hierachy中的父子层级改变前调用
- protected virtual void OnBeforeTransformParentChanged() - {} - - // 父节点（包括非直接父节点的祖先节点）在hierachy中的父子层级改变完调用 - protected virtual void OnTransformParentChanged() - {} - -#endregion -
#region UGUI特有回调函数 // 当gRectTransform大小改变（不包括位置）的时候回调。且如果子物体由于锚点的设置也会导致
@@ -59,9 +55,11 @@ namespace UnityEngine.EventSystems protected virtual void OnDidApplyAnimationProperties() {} + // 祖先节点CanvasGroup参数变化或enable\disable或canvasGroup下面的canvas的层级变化 protected virtual void OnCanvasGroupChanged() {} + // 祖先节点Canvas enable\disable或OverrideSorting状态改变 protected virtual void OnCanvasHierarchyChanged() {}
diff --git a/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/CanvasUpdateRegistry.cs b/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/CanvasUpdateRegistry.cs index bc7263b..d03d0e7 100644 --- a/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/CanvasUpdateRegistry.cs +++ b/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/CanvasUpdateRegistry.cs @@ -4,6 +4,8 @@ using UnityEngine.UI.Collections; namespace UnityEngine.UI { + // canvas的不同阶段，用来设置layout、graphic做不同的事情，具体看CanvasUpdateRegistry + // prelayout -> layout -> postlayout -> prerender -> laterender =>=>=> render public enum CanvasUpdate { Prelayout = 0, @@ -11,13 +13,14 @@ namespace UnityEngine.UI PostLayout = 2, PreRender = 3, LatePreRender = 4, + MaxUpdateValue = 5 } public interface ICanvasElement { - void Rebuild(CanvasUpdate executing); Transform transform { get; } + void Rebuild(CanvasUpdate executing); void LayoutComplete(); void GraphicUpdateComplete(); // due to unity overriding null check @@ -26,6 +29,7 @@ namespace UnityEngine.UI bool IsDestroyed(); } + // 需要注意整个游戏只有一个单例 public class CanvasUpdateRegistry { private static CanvasUpdateRegistry s_Instance; @@ -38,9 +42,11 @@ namespace UnityEngine.UI protected CanvasUpdateRegistry() { + // willRenderCanvases在渲染canvas之前调用，执行PerformUpdate来Rebuild处理m_LayoutRebuildQueue和m_GraphicRebuildQueue Canvas.willRenderCanvases += PerformUpdate; } + // 简单单例 public static CanvasUpdateRegistry instance { get @@ -51,6 +57,7 @@ namespace UnityEngine.UI } } + // 检查一下实现了ICanvasElement的对象合法性，实现了ICanvasElement接口的对象必须是Unity Object， private bool ObjectValidForUpdate(ICanvasElement element) { var valid = element != null; @@ -104,6 +111,8 @@ namespace UnityEngine.UI } private static readonly Comparison<ICanvasElement> s_SortLayoutFunction = SortLayoutList; + // 在渲染canvas之前对canvas下的元素进行rebuild + // 进行 prelayout -> layout -> postlayout -> prerender -> LatePreRender 流程 private void PerformUpdate() { UISystemProfilerApi.BeginSample(UISystemProfilerApi.SampleType.Layout); @@ -111,8 +120,12 @@ namespace UnityEngine.UI m_PerformingLayoutUpdate = true; + // 重建layout + + // 根据父节点从少到多排序，先布局父节点少的，由少到多，由内到外 m_LayoutRebuildQueue.Sort(s_SortLayoutFunction); - for (int i = 0; i <= (int)CanvasUpdate.PostLayout; i++) + // prelayout -> layout -> postlayout + for (int i = 0; i <= (int)CanvasUpdate.PostLayout; i++) // 不同的阶段 { for (int j = 0; j < m_LayoutRebuildQueue.Count; j++) { @@ -129,16 +142,22 @@ namespace UnityEngine.UI } } + // 布局完成 for (int i = 0; i < m_LayoutRebuildQueue.Count; ++i) m_LayoutRebuildQueue[i].LayoutComplete(); + // 清空队列，重置状态 instance.m_LayoutRebuildQueue.Clear(); m_PerformingLayoutUpdate = false; + // 做剔除（裁剪） // now layout is complete do culling... ClipperRegistry.instance.Cull(); + // 重建graphic + m_PerformingGraphicUpdate = true; + // prerender -> lateprerender for (var i = (int)CanvasUpdate.PreRender; i < (int)CanvasUpdate.MaxUpdateValue; i++) { for (var k = 0; k < instance.m_GraphicRebuildQueue.Count; k++) @@ -156,14 +175,21 @@ namespace UnityEngine.UI } } + // graphic设置mesh和材质完成 for (int i = 0; i < m_GraphicRebuildQueue.Count; ++i) m_GraphicRebuildQueue[i].GraphicUpdateComplete(); + // 清空队列，重置状态 instance.m_GraphicRebuildQueue.Clear(); m_PerformingGraphicUpdate = false; + + // 到了这里布局和网格、材质都设置完毕，后面canvas会渲染 + + // profiler不用管 UISystemProfilerApi.EndSample(UISystemProfilerApi.SampleType.Layout); } + // 统计父节点个数 private static int ParentCount(Transform child) { if (child == null) @@ -179,14 +205,27 @@ namespace UnityEngine.UI return count; } + // 根据父节点由少到多排序 private static int SortLayoutList(ICanvasElement x, ICanvasElement y) { Transform t1 = x.transform; Transform t2 = y.transform; return ParentCount(t1) - ParentCount(t2); + }
+
+ public static bool IsRebuildingLayout() + { + return instance.m_PerformingLayoutUpdate; } + public static bool IsRebuildingGraphics() + { + return instance.m_PerformingGraphicUpdate; + }
+
+#region 将canvas elements注册到队列里的方法 +
public static void RegisterCanvasElementForLayoutRebuild(ICanvasElement element) { instance.InternalRegisterCanvasElementForLayoutRebuild(element); @@ -260,16 +299,9 @@ namespace UnityEngine.UI } element.GraphicUpdateComplete(); instance.m_GraphicRebuildQueue.Remove(element); - } + }
+
+#endregion - public static bool IsRebuildingLayout() - { - return instance.m_PerformingLayoutUpdate; - } - - public static bool IsRebuildingGraphics() - { - return instance.m_PerformingGraphicUpdate; - } } } diff --git a/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/Graphics/Graphic.cs b/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/Graphics/Graphic.cs index 4bbabc7..1ded27a 100644 --- a/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/Graphics/Graphic.cs +++ b/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/Graphics/Graphic.cs @@ -411,6 +411,7 @@ namespace UnityEngine.UI workerMesh.Clear(); } + // 自定义流程 var components = ListPool<Component>.Get(); GetComponents(typeof(IMeshModifier), components); diff --git a/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/VertexModifiers/BaseMeshEffect.cs b/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/VertexModifiers/BaseMeshEffect.cs index 785de2a..aac679d 100644 --- a/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/VertexModifiers/BaseMeshEffect.cs +++ b/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/VertexModifiers/BaseMeshEffect.cs @@ -9,8 +9,9 @@ namespace UnityEngine.UI { [Obsolete("Use BaseMeshEffect.ModifyMeshes instead", true)] //We can't upgrade automatically since the signature changed. public abstract void ModifyVertices(List<UIVertex> vertices); - } - + }
+
+ // 关键在于实现IMeshModifier接口，自己写效果，不一定要继承这个类
[ExecuteInEditMode] public abstract class BaseMeshEffect : UIBehaviour, IMeshModifier { |