Unreal Engine 5 C++: Make Your Own Action Combat Game Lecture 31

[Haitham]

In lecture 31. Observer Pattern I copied the instructor’s code on this link and it didn’t work (23. Observer Pattern (5a8d6b45) · Commits · GameDev.tv / Unreal Action Combat / GameDev.tv - Unreal Action Combat · GitLab)
Somehow my Unreal can’t compile successfully
Something about Broadcast is not a member of fonupdatedtargetsignature and see declaration of fonupdatedtargetsignature

Here’s my log

Here’s my lockon header file

Here’s my lockon cpp file
I dit restart UE but still did not compile

[beegeedee]

Your class name case in the delegate is wrong. You called your class ULockonComponent but the instructor used ULockOnComponent. The cases don’t match.

All the errors you’ve shared are for exactly this issue.

[Haitham]

Sorry, which line is it i couldn’t find it
Edit: I got it, mine was
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_OneParam(
FOnUpdatedTargetSignature,
ULockOnComponent, OnUpdatedTargetDelegate,
AActor*, NewTargetActorRef
);
And the instructor’s
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_OneParam(
FOnUpdatedTargetSignature,
ULockonComponent, OnUpdatedTargetDelegate,
AActor*, NewTargetActorRef
);

[beegeedee]

@Haitham

ULockOnComponent, OnUpdatedTargetDelegate

The o in LockOn should be lower case o, not a capital.