[UE4]Constructor与Runtime两种环境下创建Component并Attach的方式

Component MyActor.h： UShapeComponent * CollisionMesh; Constructor中 Create & Attach MyActor.cpp： CollisionMesh = CreateDefaultSubobject<UBoxComponent>(TEXT("TestCollision")); if(CollisionMesh) { CollisionMesh->SetupAttachment(GetRootComponent()); } Runtime中（非构造） Create & Attach MyActor.cpp： CollisionMesh = NewObject<UBoxComponent>(this); if (CollisionMesh) { CollisionMesh->RegisterComponent(); CollisionMesh->AttachToComponent(GetRootComponent(), FAttachmentTransformRules::KeepRelativeTransform)...