1

Src/Unity/Scripts/UX/Library/TabContainer.cs

@@ -73,15 +73,20 @@ namespace BITKit.UX
 				{
 					_externalTabBar.OnTabChanged -= EntryTab;
 				}
-				if (panel?.visualTree != null)
+				if (parent is not null)
 				{
-					_externalTabBar = panel.visualTree.Q<TabBar>(value);
+					_externalTabBar = parent.Q<TabBar>(value);
 					if (_externalTabBar is not null)
 					{
 						_externalTabBar.OnTabChanged += EntryTab;
-					}
+					}	
+					viewDataKey=_externalTabBar is null ? $"找到了:{value}" :$"未找到:{value}";
 				}
-				viewDataKey=_externalTabBar is null ? "找到了TabBar" :"未找到Tab";
+				else
+				{
+					viewDataKey = $"{value} is null";
+				}
+		
 			}
 		}
 		private readonly VisualElement _container;
@@ -104,12 +109,24 @@ namespace BITKit.UX
 		}
 		public void EntryTab(int index)
 		{
+			if(index == -1)return;
+			var isCatched = false;
 			foreach (var x in _container.Children())
 			{
 				x.SetActive(false);
 			}
-			if(_container.Children().TryGetElementAt(index,out var element))
+
+			if (_container.Children().TryGetElementAt(index, out var element))
+			{
+				isCatched = true;
 				element.SetActive(true);
+			}
+
+			if (index is -1 && isCatched is false  && this.childCount>0)
+			{
+				this.Children().First().SetActive(true);
+			}
+			
 			OnTabChanged?.Invoke(index);
 		}
 	}