我在FCraftingRecipie结构中声明变量时遇到问题。因为第19行引发错误无法识别的类型“FMasterItem”-类型必须是UCLASS、USTRUCT或UENUM -MasterItem. h-第19行
Master项目需要存储FCraftingRecipie数组，因为这是所需项目和数量的列表。
以下是主项目头文件的副本

#pragma once
#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "Engine/DataTable.h"
#include "MasterItem.generated.h"
USTRUCT(BlueprintType)
struct FCraftingRecipie : public FTableRowBase
{
    GENERATED_BODY()
public:
    FCraftingRecipie();
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        FMasterItem itemClass;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        int amount;
};
USTRUCT(BlueprintType)
struct FMasterItem : public FTableRowBase
{
    GENERATED_BODY()
public:
    FMasterItem();
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        FName itemID;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        FText name;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        FText description;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        UTexture2D* itemIcon;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        bool canBeUsed;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        FText useText;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        bool isStackable;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        float itemWeight;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        TArray<FCraftingRecipie> recipie;
    UPROPERTY(EditAnywhere, BlueprintReadWrite)
        float price;
    bool operator==(const FMasterItem& OtherItem) const
    {
        if (itemID == OtherItem.itemID)
        {
            return true;
        }
        return false;
    }
};