How to add and remove a Box Collision Component in C++?

[anonymous_user_67a6e241]

In The Declaration class definition file (.h)

UBoxComponent* CollisionMesh = nullptr;

In The constructor class definition file (.cpp) :

CollisionMesh = CreateDefaultSubobject<UBoxComponent>(FName("Collision Mesh"));

If you need to put it at the top hierarchy:

SetRootComponent(CollisionMesh);

If you need add other child component like particle system :

Blast = CreateDefaultSubobject<UParticleSystemComponent>(FName("BlastExplosion"));
Blast->AttachToComponent(RootComponent, FAttachmentTransformRules::KeepRelativeTransform); // since 4.12 isn't AttachTo(1arg) anymore, but AttachToComponent(2args)

CreateDefaultSubobject works only in constructor. Everywhere else use NewObject.