自定義數據表：

#pragma once

#include "CoreMinimal.h"
#include "Engine/UserDefinedStruct.h"
#include "Components/CanvasPanel.h"
#include "Blueprint/UserWidget.h"
#include "Runtime/Engine/Classes/Engine/UserDefinedStruct.h"
#include "Runtime/Engine/Classes/Engine/DataTable.h"
#include "Runtime/CoreUObject/Public/UObject/ObjectMacros.h
 
"

#include "MiniMapFlagData.generated.h"


/*BlueprintType：暴露成為藍圖數據類型，藍圖變量可以使用該結構體作為數據類型*/
USTRUCT(BlueprintType)
struct FUMiniMapFlagDataC : public FTableRowBase
{
    GENERATED_USTRUCT_BODY()

    //小圖標
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        UUserWidget* flag;

    //小圖標對應的Actor
 

    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        AActor* Actor;

    //小圖標對應的Canvas panel Slot
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        UCanvasPanelSlot* Slot;

    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        int MyAge;
};

成員變量添加UPROPERTY標簽，可以享受到UE4垃圾自動管理機制，不用手動釋放變量內存。

自定義類

#pragma once

#include "CoreMinimal.h"
#include "Engine/UserDefinedStruct.h"
#include "Components/CanvasPanel.h"
#include "Blueprint/UserWidget.h"
#include "Runtime/Engine/Classes/Engine/UserDefinedStruct.h"
#include "Runtime/Engine/Classes/Engine/DataTable.h"
#include "Runtime/CoreUObject/Public/UObject/ObjectMacros.h"

#include "MiniMapFlagData.generated.h"

/**
*
*/
UCLASS(BlueprintType)
class PROJ10_0121_API UMiniMapFlagData : public UUserDefinedStruct
{
    GENERATED_BODY()

public:
    UMiniMapFlagData() {}
    UMiniMapFlagData(UUserWidget* flag, AActor* Actor, UCanvasPanelSlot* Slot)
        :flag(flag), Actor(Actor), Slot(Slot)
    {}
    /*
        flag(flag)表示將參數flag賦值給成員參數flag
        使用方法：UMiniMapFlagData data(flag,Actor,Slot);
    */

public:
    //小圖標
    UPROPERTY()
        UUserWidget* flag;

    //小圖標對應的Actor
    UPROPERTY()
        AActor* Actor;

    //小圖標對應的Canvas panel Slot
    UPROPERTY()
        UCanvasPanelSlot* Slot;

    UPROPERTY()
        int MyAge;

};

自定義函數添加說明文字，可在藍圖中顯示，如果要支持中文，則只要把h和cpp文件以utf-8編碼保存就可以了。

註意：EditAnywhere,BlueprintReadWrite等等修飾符不能拼寫錯誤，拼寫錯誤是不會有錯誤提示的，並且編譯出錯信息也不會告訴我們是修飾符寫錯了，只會說編譯出錯，沒有詳細的出錯信息。

#include "CoreMinimal.h"
#include "Blueprint/UserWidget.h"
#include "Components/CanvasPanel.h"
#include "MiniMap/MiniMapFlagData.h"

#include "StaticMiniMapBase.generated.h"

/**
 * 
 */
UCLASS()
class PROJ10_0121_API UStaticMiniMapBase : public UUserWidget
{
    GENERATED_BODY()

protected:
    UPROPERTY(EditAnywhere,BlueprintReadWrite, Category=myMethods,meta=(ToolTip="小圖標容器面板"))
        UCanvasPanel * PanelFlag;
     
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = myMethods,meta=(ToolTip="存放小圖標數據機構數組"))
        TArray<UMiniMapFlagData*> ArrayFlag;
    //TArray<TSubclassOf<class UMiniMapFlagData>> FlagArray;

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = myVariables,meta=(ToolTip="小地圖比例尺"))
        float RatioMap;
    
protected:
    UFUNCTION(BlueprintCallable, Category = myMethods,meta=(ToolTip="初始化UI控件對象"))
        void ini(UCanvasPanel* sFlagPanel);

public:
    UFUNCTION(BlueprintCallable, Category = myMethods,meta=(ToolTip="添加圖標到小地圖"))
    void Add_Flag(UUserWidget* flag, AActor* actor);
    
};

ArrayFlag是在C++定義的函數，可以在藍圖中顯示中文說明文字。

[UE4]自定義結構體、類、數據表