Unreal Engine 4 OnOverlap

.h

UFUNCTION()
virtual void OnOverlapBegin(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);

UFUNCTION()
virtual void OnOverlapEnd(UPrimitiveComponent* OverlappedComponent, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex);

.cpp

->OnComponentBeginOverlap.AddDynamic(this, &AItem::OnOverlapBegin);
->OnComponentEndOverlap.AddDynamic(this, &AItem::OnOverlapEnd);