Struggling with GetComponentsByTag

Development Programming & Scripting C++
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1

OtherActor->GetComponentsByTag(TSubclassOf, )

I have been struggling with what to put and i would like to use the box component.
Thank you

2

Here is an example, that will get an array of box components components with the “tag1” tag and then log their names:

TArray<UActorComponent*> Comps = GetComponentsByTag(UBoxComponent::StaticClass(), "tag1");

for (const auto& component : Comps)
{
	UE_LOG(LogTemp, Warning, TEXT("Comps > %s"), *component->GetName());
}
1 Like
3

if(OtherActor->GetComponentsByTag(GetComponentsByTag(UBoxComponent::StaticClass(), “tag1”))
{

        }

I have tried other ways and i cant figure it out, not sure why

4

Like I said before “GetComponentsByTag, returns a TArray, so why are you checking that in an if?”

If you want to check an array, check its size:

if (OtherActor->GetComponentsByTag(UBoxComponent::StaticClass(), "tag1").Num() > 0)
{
    // there are Box components with that tag
}
5

Yes thank you. that was me being dumb

6

What is the problem and why do you have GetComponentsByTag twice?

Also, GetComponentsByTag, returns a TArray, so why are you checking that in an if? What are you trying to achieve?

7

sorry i didnt mean to put it twice but the error is = error: use of undeclared identifier ‘UBoxComponent’

8

Did you included the BoxComponent header?

#include "Components/BoxComponent.h"
9

Now i am getting this error: error: value of type ‘TArray’ is not contextually convertible to ‘bool’

10

You probably check the for the presence of the TArray, not its content.
Try something like

TArray.IsEmpty()