unreal engine 5.2 基本数据类型

基本数据类型

蓝图	C++	sizeof	描述
Boolean	bool	1	true / false
Byte	uint8	1	0 / 255
Integer	int32	4	−2,147,483,648 / 2,147,483,647
Integer64	int64	8	−9,223,372,036,854,775,808 / 9,223,372,036,854,775,807
Float	double	8
Name	FName	12	不区分大小写。它们为不可变，无法被操作。
String	FString	16	可变字符串
Text	FText	24	文本本地化的主要组件
Vector	FVector	24
Vector2D	FVector2D	16
Rotator	FRotator	24
Transform	FTransform	96
UObject	UObject	48
UFunction	UFunction	264
AActor	AActor	1024

通过C++ Header Preview工具查看实际映射

/** Please add a class description */
UCLASS(Blueprintable, BlueprintType)
class ABp_HelloGameState : public AHelloGameStateBase
{
    GENERATED_BODY()
public:
    /** Please add a variable description */
    UPROPERTY(BlueprintReadOnly, VisibleAnywhere, Category="Default")
    TObjectPtr<USceneComponent> DefaultSceneRoot;

    /** Please add a variable description */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category="Default")
    bool NewVar;

    /** Please add a variable description */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category="Default")
    uint8 NewVar_0;

    /** Please add a variable description */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category="Default")
    int32 NewVar_1;

    /** Please add a variable description */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category="Default")
    int64 NewVar_2;

    /** Please add a variable description */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category="Default")
    double NewVar_3;

    /** Please add a variable description */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category="Default")
    FName NewVar_4;

    /** Please add a variable description */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category="Default")
    FString NewVar_5;

    /** Please add a variable description */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category="Default")
    FText NewVar_6;

    /** Please add a variable description */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category="Default")
    FVector NewVar_7;

    /** Please add a variable description */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category="Default")
    FRotator NewVar_8;

    /** Please add a variable description */
    UPROPERTY(BlueprintReadWrite, EditDefaultsOnly, Category="Default")
    FTransform NewVar_9;
};

参考

https://docs.unrealengine.com/5.2/zh-CN/blueprint-variables-in-unreal-engine/
https://docs.unrealengine.com/5.2/zh-CN/string-handling-in-unreal-engine/
https://docs.unrealengine.com/5.0/zh-CN/epic-cplusplus-coding-standard-for-unreal-engine/
https://www.tomlooman.com/unreal-engine-cpp-guide/
https://en.cppreference.com/w/cpp/language/types
https://zhuanlan.zhihu.com/p/163587790