一、打开关卡

UGameplayStatics::OpenLevel(GetWorld(), TEXT("Map1"));

二、退出关卡

//退出关卡

UGameplayStatics::GetPlayerController(GWorld, 0)->ConsoleCommand("quit");

三、TActorIterator 遍历

for (TActorIterator ActorIter(GetWorld()); ActorIter; ++ActorIter)
{
	UKismetSystemLibrary::PrintString(GetWorld(), FString::Printf(TEXT("%s"), *ActorIter->GetName()));
}

  UKismetSystemLibrary::GetAllActorsOfClass

TArray OutActors;
UGameplayStatics::GetAllActorsOfClass(GetWorld(), AStaticMeshActor::StaticClass(), OutActors);
for (AActor* actor : OutActors)
{
UKismetSystemLibrary::PrintString(GetWorld(), actor->GetName());
}

四、蓝图指认类

     UPROPERTY(VisibleAnywhere,Category = UI)

           TSubclassOfActor_Instance;

五、加载蓝图资源

        静态加载资源

//静态加载模型资源
MeshObj = CreateDefaultSubobject(TEXT("Mesh1"));
static ConstructorHelpers::FObjectFinder TmpMesh(TEXT("StaticMesh'/Game/StarterContent/Shapes/Shape_NarrowCapsule.Shape_NarrowCapsule'"));
MeshObj->SetStaticMesh(TmpMesh.Object);
 
静态加载类
static ConstructorHelpers::FClassFinderMyActor2(TEXT("BBlueprint'/Game/Blueprints/BP_LoadTest.BP_LoadTest_C'"));
MyActor = MyActor2.Class;

       动态加载资源

//动态加载资源类
UMaterial *mt = LoadObject<UMaterial>(nullptr, TEXT("/Game/Map/Materials/grass.grass"));
UMaterial *mt = Cast<UMaterial>(StaticLoadObject(UMaterial::StaticClass(), nullptr, TEXT("/Game/Map/Materials/grass.grass")));
 
//动态加载类
Class = LoadClass<AActor>(nullptr,TEXT("Blueprint'/Game/BluePrint/BP_Test.BP_Test_C'"))
Class = Cast<UClass>(StaticLoadObject(UClass::StaticClass(), nullptr, TEXT("Blueprint'/Game/BluePrint/BP_Test.BP_Test_C'")));

六、获取GameMode

AXuHuanVSGameModeBase *MyGameMode = Cast<AXuHuanVSGameModeBase>(GetWorld()->GetAuthGameMode());

七、获取Pawn

AMyPawn *MyPawn = Cast<AMyPawn>(GetWorld()->GetFirstPlayerController()->GetPawn());

八、获取GameState

AGameState *MyState = Cast<AGameState>(GetWorld()->GetGameState());

九、获取PlayerController

AMyPlayerController *MyPlayerController = Cast<AMyPlayerController>(GetWorld()->GetFirstPlayerController());

十、设置UE4世界设置默认的类

    DefaultPawnClass = AMyPawn::StaticClass();
	HUDClass = AMyHUD::StaticClass();
	PlayerControllerClass = AMyPlayerController::StaticClass();
	GameStateClass = AMyGameState::StaticClass();
	PlayerStateClass = AMyPlayerState::StaticClass();

十二、RInterp To

(FMath::RInterpTo(GetControlRotation(), DesireRotation, GetWorld()->GetRealTimeSeconds(), 10)；

 十三、枚举

UENUM()
namespace MyEnum
{
   enum MyTpe
   {
      Type1,
      Type2,
      Type3,
   }
}
 
//声明变量
UPROPERTY(EditDefaultsOnly, Category = KWorld)
		TEnumAsByteCustomA;

十四、结构体

USTRUCT()
struct FGameCharacterDataAttribute
{
	GENERATED_USTRUCT_BODY()
	//角色名称
	UPROPERTY()
		FName Character;
	//角色ID
	UPROPERTY()
		int32 CharacterID;
public:
	FGameCharacterDataAttribute();
}
 
//声明变量
 
	UPROPERTY()
	FGameCharacterDataAttribute CharacterDataBase;