UE蓝图中变量的建立

先在C++的.h下设置变量名和属性

如下所示：

//场景中编辑，蓝图可读写
UPROPERTY(EditInstanceOnly,BlueprintReadWrite,Category= "FloaterVar")
FVector InitialLoction;//=FVector(0);
//任意窗口可见，蓝图只读
UPROPERTY(EditAnywhere,BlueprintReadOnly,Category= "FloaterVar")
//自定义的逻辑变量
bool bShouldFloat;
//蓝图窗口可编辑，蓝图可读写
UPROPERTY(EditDefaultsOnly,BlueprintReadWrite,Category= "FloaterVar")
bool bInitializeFloaterLocation;

然后在.cpp中初始化变量，并使用变量

如下所示：

AFloater::AFloater()
{
//构造函数
// Set this actor to call Tick() every frame. You can turn this off to improve performance if you don't need it.
PrimaryActorTick.bCanEverTick = true;
StaticMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("CustomStaticMesh"));
//变量初始化
InitialLoction = FVector(0);
bInitializeFloaterLocation = false;
bShouldFloat = false;
InitialDirection = FVector(1,0,0);

}
// Called when the game starts or when spawned
void AFloater::BeginPlay()
{
Super::BeginPlay();

if (bInitializeFloaterLocation) {
SetActorLocation(InitialLoction);
}

}

// Called every frame

//这是Tick事件
void AFloater::Tick(float DeltaTime)
{
Super::Tick(DeltaTime);
if (bShouldFloat)
{
AddActorLocalOffset(InitialDirection);
}
}