UE4 数据 Table 结构错误

Question

我正在关注有关 CSV table 条目的 Packt 教程。本教程要求我 a) 创建一个新的 Actor class，b) 将其命名为 TestCustomData，然后 c )将新生成的TestCustomData.h中的内容替换为如下代码：

#pragma once

#include "TestCustomData.generated.h"

USTRUCT(BlueprintType)
struct FTestCustomData : public FTableRowBase
{
GENERATED_USTRUCT_BODY()

UPROPERTY( BlueprintReadOnly, Category = "TestCustomData" )
int32 SomeNumber;

UPROPERTY( BlueprintReadOnly, Category = "TestCustomData" )
FString SomeString;
};

但是，TestCustomData文件编译失败，输出如下日志：

Error f:\unreal\ue4 assignments\ue4_projectrpg\source\ue4_projectrpg\TestCustomData.h(5) : error C2504: 'FTableRowBase': base class undefined
Info Compiling game modules for hot reload
Info Parsing headers for UE4_ProjectRPGEditor
Info   Running UnrealHeaderTool "F:\Unreal\UE4 Assignments\UE4_ProjectRPG\UE4_ProjectRPG.uproject" "F:\Unreal\UE4 Assignments\UE4_ProjectRPG\Intermediate\Build\Win64\UE4_ProjectRPGEditor\Development\UE4_ProjectRPGEditor.uhtmanifest" -LogCmds="loginit warning, logexit warning, logdatabase error" -Unattended -WarningsAsErrors -installed
Info Reflection code generated for UE4_ProjectRPGEditor in 3.4146568 seconds
Info Performing 4 actions (4 in parallel)
Info TestCustomData.cpp
Info UE4_ProjectRPG.generated.cpp
Error f:\unreal\ue4 assignments\ue4_projectrpg\source\ue4_projectrpg\TestCustomData.h(6) : error C3646: 'Super': unknown override specifier
Error f:\unreal\ue4 assignments\ue4_projectrpg\source\ue4_projectrpg\TestCustomData.h(6) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
Error F:\Unreal\UE4 Assignments\UE4_ProjectRPG\Source\UE4_ProjectRPG\TestCustomData.h(5) : error C2504: 'FTableRowBase': base class undefined
Error F:\Unreal\UE4 Assignments\UE4_ProjectRPG\Source\UE4_ProjectRPG\TestCustomData.h(6) : error C3646: 'Super': unknown override specifier
Error F:\Unreal\UE4 Assignments\UE4_ProjectRPG\Source\UE4_ProjectRPG\TestCustomData.h(6) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
Info ERROR: UBT ERROR: Failed to produce item: F:\Unreal\UE4 Assignments\UE4_ProjectRPG\Binaries\Win64\UE4Editor-UE4_ProjectRPG-3031.dll
Info Total build time: 6.88 seconds (Local executor: 0.00 seconds)

我对 UE4 中的 Whosebug 和 C++ 还很陌生，如有任何帮助，我们将不胜感激。也欢迎任何改进我的问题的反馈！预先感谢您的帮助。

Answer 1

我被困在同一个地方，这解决了它：我将资产命名为 "MyActor2" 并将结构命名为 "ThisNewStructure"，因此存在一些小差异...

我认为基本上是 Datatable.h 和 "public:" 成功了。

头文件：

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "Runtime/Engine/Classes/Engine/DataTable.h"
#include "MyActor2.generated.h"

USTRUCT(BlueprintType)
struct FThisNewStructure : public FTableRowBase
{
    GENERATED_USTRUCT_BODY()
public:

    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = test)
        int32 SomeNumber;
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = test)
        FString SomeString;

};

cpp:

#include "MyActor2.h"

然后编译成功。我不得不为编辑器做一些 closing/reopening 的 VS 和 UE 以了解新结构。

Answer 2

可能有点晚了，但我只是运行亲自参与其中。有时您会有一个自动获取 FTableRowBase 的包含，但有时 class 没有回调它的 header。在那种情况下：

#pragma once

#include "Engine/DataTable.h"//this is where FTableRowBase is declared.
#include "TestCustomData.generated.h"

struct FFoo : FTableRowBase
{
    GENERATED_USTRUCT_BODY()
    public:
       the rest of your class...

希望对您有所帮助！ :D

Answer 3

感谢您的帮助，我在同一教程中解决了同样的问题。显然您不需要将 TestCustomData 重命名为 MyActor2，您只需要在 "GENERATED_USTRUCT_BODY()".

之后添加行 "public:"

UE4 数据 Table 结构错误

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c++

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unreal-engine4