1

Signed-off-by: TRAfoer <lhf190@outlook.com>

Assets/Scripts/Manager/InputListener.cs

@@ -23,6 +23,12 @@ namespace Ichni.Editor
         private List<SelectionConnector> lastHitConnectors = new List<SelectionConnector>();
         private int currentSelectIndex = 0;
 
+        private Vector2 lastMousePosition;
+        private bool cachedIsPointerOverUI;
+        private GameObject cachedHoveredUI;
+        private int uiCheckFrameInterval = 3; // 每3帧检查一次
+        private int frameCount;
+
         private void Awake()
         {
             instance = this;
@@ -34,7 +40,22 @@ namespace Ichni.Editor
 
         private void Update()
         {
-            isPointerOverUI = IsPointerOverUI(out hoveredUI);
+            frameCount++;
+
+            // 只有当鼠标移动或每隔几帧时才更新UI检测
+            Vector2 currentMousePosition = Mouse.current.position.ReadValue();
+            if (currentMousePosition != lastMousePosition || frameCount % uiCheckFrameInterval == 0)
+            {
+                isPointerOverUI = IsPointerOverUI(out hoveredUI);
+                lastMousePosition = currentMousePosition;
+                cachedIsPointerOverUI = isPointerOverUI;
+                cachedHoveredUI = hoveredUI;
+            }
+            else
+            {
+                isPointerOverUI = cachedIsPointerOverUI;
+                hoveredUI = cachedHoveredUI;
+            }
 
             SceneCameraOperation();
             MusicPlayerOperation();
@@ -296,6 +317,12 @@ namespace Ichni.Editor
         public bool IsPointerOverUI(out GameObject hoveredUI)
         {
             hoveredUI = null;
+
+            // 快速检查 - 使用Unity内置方法
+            if (!EventSystem.current.IsPointerOverGameObject())
+                return false;
+
+            // 详细检查 - 只有当快速检查通过时才执行
             if (eventSystem == null || graphicRaycasters.Count == 0)
                 return false;
 
@@ -306,20 +333,19 @@ namespace Ichni.Editor
 
             List<RaycastResult> allResults = new List<RaycastResult>();
 
-            // 遍历所有 Canvas 上的 GraphicRaycaster
-            foreach (var raycaster in graphicRaycasters)
+            // 只对最上层的Canvas进行检测
+            foreach (var raycaster in graphicRaycasters.Where(r => r.gameObject.activeInHierarchy))
             {
                 List<RaycastResult> results = new List<RaycastResult>();
                 raycaster.Raycast(pointerEventData, results);
-                allResults.AddRange(results);
-            }
 
-            if (allResults.Count > 0)
-            {
-                // 按照 sortingOrder 获取最前面的 UI 物体
-                allResults.Sort((a, b) => b.sortingOrder.CompareTo(a.sortingOrder));
-                hoveredUI = allResults[0].gameObject;
-                return true;
+                if (results.Count > 0)
+                {
+                    // 找到最前面的结果后立即返回
+                    results.Sort((a, b) => b.sortingOrder.CompareTo(a.sortingOrder));
+                    hoveredUI = results[0].gameObject;
+                    return true;
+                }
             }
 
             return false;