大纲视图需要treeview控件的树形结构展示，创建一个treeview需要两个要素：

1、Item：我称之为一组数据，就类似于一个actor中都包含哪些组件，或者是一个类与类中的成员。

2、treeview控件：实现树形结构的类，在这个类中将item作为数据添加到树形结构中，然后创建树形结构。

Item数据类的示例（没有什么复杂实现，所以只有一个.h就可以）

#pragma onceclass FCustomItemClass : public TSharedFromThis<FCustomItemClass>
{
public://FString Name;//TArray<TSharedPtr<FCustomItemClass>> Children;// 构造函数FCustomItemClass(const FString& InName) : Name(InName) { }	void addChild(TSharedPtr<FCustomItemClass> Child){Children.Add(Child);}
};

treeview类的示例

#pragma once
#include "CustomItemClass.h"class CUSTOMWINDOW_API SCustomOutliner : public SCompoundWidget
{
public:SLATE_BEGIN_ARGS(SCustomOutliner){}SLATE_END_ARGS()void Construct(const FArguments& InArgs);private:// 1. TreeView 必需的两个成员TSharedPtr<STreeView<TSharedPtr<FCustomItemClass>>> TreeViewWidget;  // TreeViewDataTArray<TSharedPtr<FCustomItemClass>> RootItems;                      // 根节点数组// 2. TreeView 必需的两个回调函数TSharedRef<ITableRow> OnGenerateRow(TSharedPtr<FCustomItemClass> Item, const TSharedRef<STableViewBase>& OwnerTable);void OnGetChildren(TSharedPtr<FCustomItemClass> Item, TArray<TSharedPtr<FCustomItemClass>>& OutChildren);};

#include "CustomOutliner.h"#include "CustomItemClass.h"
#include "Kismet/GameplayStatics.h"
#include "GameFramework/Actor.h"void SCustomOutliner::Construct(const FArguments& InArgs)
{UWorld* World = GEngine->GetWorldContexts()[0].World();if (World){TSharedPtr<FCustomItemClass> RootActor = MakeShareable(new FCustomItemClass("SceneActor"));TArray<AActor*> AllActors;UGameplayStatics::GetAllActorsOfClass(World, AActor::StaticClass(), AllActors);//遍历容器内元素for (AActor* Actor : AllActors){if (Actor){TSharedPtr<FCustomItemClass> ActorItem = MakeShareable(new FCustomItemClass(Actor->GetName()));//用于存储和管理场景中的组件数组。它通常用于存储USceneComponent对象，这些对象代表了场景中的各种组件，如网格体、摄像机等。TInlineComponentArray<UActorComponent*> Components;Actor->GetComponents(Components);for (UActorComponent* Component : Components){if (Component){TSharedPtr<FCustomItemClass> ComponentItem = MakeShareable(new FCustomItemClass(Component->GetName()));ActorItem->addChild(ComponentItem);}}RootActor->addChild(ActorItem);}}RootItems.Add(RootActor);}//这里是最简树形结构的数据示例TSharedPtr<FCustomItemClass> Root = MakeShareable(new FCustomItemClass("A"));TSharedPtr<FCustomItemClass> A1 = MakeShareable(new FCustomItemClass("A1"));TSharedPtr<FCustomItemClass> A2 = MakeShareable(new FCustomItemClass("A1_1"));Root->addChild(A1);A1->addChild(A2);RootItems.Add(Root);ChildSlot[SAssignNew(TreeViewWidget, STreeView<TSharedPtr<FCustomItemClass>>).TreeItemsSource(&RootItems).OnGenerateRow(this, &SCustomOutliner::OnGenerateRow).OnGetChildren(this, &SCustomOutliner::OnGetChildren)];
}TSharedRef<ITableRow> SCustomOutliner::OnGenerateRow(TSharedPtr<FCustomItemClass> Item,const TSharedRef<STableViewBase>& OwnerTable)
{return SNew(STableRow<TSharedPtr<FCustomItemClass>>, OwnerTable)[SNew(STextBlock).Text(FText::FromString(Item->Name))];
}void SCustomOutliner::OnGetChildren(TSharedPtr<FCustomItemClass> Item,TArray<TSharedPtr<FCustomItemClass>>& OutChildren)
{OutChildren = Item->Children;
}

显示（调用）方法

return SNew(SDockTab).TabRole(ETabRole::PanelTab).Label(FText::FromString("OutlinerTabLabel")) //使用宏DefineLabel.ToolTipText(FText::FromString("OutlinerTabToolTip"))[//创建一个树形结构类的实例SNew(SCustomOutliner)];