ue4-数据表的使用

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把它做成一个插件，再写个导出二进制数据的方法导出一个二进制文件a.bin，然后在游戏运行时读取a.bin文件，这样数据就相对安全点了

1、excel中到处csv，再导入ue中（貌似可以直接认识的只有csv了）

另存为csv文件

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2、c++中写个结构体对应字段属性，字段名必须完全一致

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USTRUCT(Blueprintable)
struct FTestData : public FTableRowBase
{
    GENERATED_USTRUCT_BODY()
public:
    FTestData();
    virtual ~FTestData();

public:
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "FTestData")
        int32           mId;
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "FTestData")
        FString         mName;
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "FTestData")
        FString         mDescr;
};

3、导入csv到ue中

（导入时记得关闭excel，不然文件被进程占用无法导入）

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数据导入Done

4、c++中使用这些数据

把他丢带一个资源引用指针中，资源数据中引用好这个数据表资源，延迟加载

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UCLASS()
class UResDataBase : public UDataAsset
{
    GENERATED_BODY()
public:
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "UResMgr")
        TAssetPtr<UDataTable>   mTestData;
private:
    //TMap<int32, UBehaviorData*>       mBehaviorDataMap;//存放技能数据
};

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5、加载引用的资源

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void UResMgr::TestloadCSV()
{
	UObject* obj = mAssetLoader->SynchronousLoad(mResDB->mTestData.ToStringReference());
	UDataTable* data = Cast<UDataTable>(obj);
	if (data != nullptr)
	{
		UE_LOG(ResLogger, Warning, TEXT("--- UResMgr::TestloadCSV success"));
		FTestData* tmpPtr = nullptr;
		for (auto it : data->RowMap)
		{
			// it.Key has the key from first column of the CSV file
			// it.Value has a pointer to a struct of data. You can safely cast it to your actual type, e.g FMyStruct* data = (FMyStruct*)(it.Value);
			tmpPtr = (FTestData*)(it.Value);
			UE_LOG(ResLogger, Warning, TEXT("--- row:%s, key:%d, name:%s"), *it.Key.ToString(), tmpPtr->mId, *tmpPtr->mName);
		}
	}
}

ps:加载器时是这个东东 FStreamableManager* mAssetLoader;

6、遍历一下结果