增加Navigation Skip

Runtime/UXComponent/Navigation/UXNavigationRuntime.cs

@@ -211,7 +211,7 @@ namespace UnityEngine.UI
 
             foreach (Transform layerRoot in _interactiveLayerRoots)
             {
-                if (layerRoot == null)
+                if (layerRoot == null || IsNavigationSkipped(layerRoot))
                 {
                     continue;
                 }
@@ -220,7 +220,9 @@ namespace UnityEngine.UI
                 for (int i = 0; i < holders.Length; i++)
                 {
                     UIHolderObjectBase holder = holders[i];
-                    if (holder == null || holder.GetComponent<UXNavigationScope>() != null)
+                    if (holder == null
+                        || holder.GetComponent<UXNavigationScope>() != null
+                        || IsNavigationSkipped(holder.transform))
                     {
                         continue;
                     }
@@ -287,7 +289,14 @@ namespace UnityEngine.UI
                 return false;
             }
 
-            return TryGetInteractiveLayerRoot(scope.transform, out _);
+            return !IsNavigationSkipped(scope.transform)
+                   && scope.HasAvailableSelectable()
+                   && TryGetInteractiveLayerRoot(scope.transform, out _);
+        }
+
+        private static bool IsNavigationSkipped(Transform current)
+        {
+            return current != null && current.GetComponentInParent<UXNavigationSkip>(true) != null;
         }
 
         private bool TryGetInteractiveLayerRoot(Transform current, out Transform layerRoot)

Runtime/UXComponent/Navigation/UXNavigationScope.cs

@@ -160,6 +160,26 @@ namespace UnityEngine.UI
             return null;
         }
 
+        internal bool HasAvailableSelectable()
+        {
+            RefreshSelectableCache();
+
+            if (IsSelectableValid(_defaultSelectable))
+            {
+                return true;
+            }
+
+            for (int i = 0; i < _cachedSelectables.Count; i++)
+            {
+                if (IsSelectableValid(_cachedSelectables[i]))
+                {
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
         internal void RecordSelection(GameObject selectedObject)
         {
             if (!_rememberLastSelection || selectedObject == null)

Runtime/UXComponent/Navigation/UXNavigationSkip.cs

@@ -0,0 +1,10 @@
+#if INPUTSYSTEM_SUPPORT
+namespace UnityEngine.UI
+{
+    [DisallowMultipleComponent]
+    [AddComponentMenu("UI/UX Navigation Skip")]
+    public sealed class UXNavigationSkip : MonoBehaviour
+    {
+    }
+}
+#endif

Runtime/UXComponent/Navigation/UXNavigationSkip.cs.meta

@@ -0,0 +1,11 @@
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