BroadCast event cpp not call my function

Development Programming & Scripting
1

Hi dear UE community,

Edit: It works now, my problem was elsewhere.

I’m trying to use MultiCast Delegate to fire an event the same way as OnComponentHit works for collision.

I have declared a Delegate in my file AShip.h:

USTRUCT(BlueprintType)
struct FDamageStruct
{
};
...
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FOnDamageTaken, const FDamageStruct&, Damage);
...

In my class:

UPROPERTY(BlueprintAssignable, Category = "Damage")
	FOnDamageTaken OnDamageTaken;

in my file AShip.cpp

OnDamageTaken.Broadcast (damage);

On an another class i register a function to this event with:

Skill.cpp:

MyShip->OnDamageTaken.AddDynamic(this, &ASkill::OnShipDamageTaken);

with Skill.h

UFUNCTION()
    void OnShipDamageTaken(const FDamageStruct& Damage);

My problem is:

During execution time my function OnShipDamageTaken is never call.

If I check the variable OnDamageTaken i see my function is registered.

Does anyone know why my function could not be called ?

Thx

References:

https://docs.unrealengine.com/latest/INT/Programming/UnrealArchitecture/Delegates/Multicast/index.html

https://docs.unrealengine.com/latest/INT/Programming/UnrealArchitecture/Delegates/index.html

2

I mark it as Solved

3

I have a same problem with you, can you tell me how to solve it? Thanks~

4

I was wondering the same thing, but then I realized AddDynamic() was calling my delegate on Broadcast(). The breakpoint in my delegate was skipped because I compiled with the “Development Editor” config and the empty call was optimized-out.

5

How did you fix the problem?

6

For people stumbling on this post years later, as i did:
The answer is to put the macro UFUNCTION() in front of the functions that are getting called by the broadcast.

1 Like