.h
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FLoginErrorEvent, FString, ErrorMessage);
UPROPERTY(BlueprintAssignable, Category = "Event")
FLoginErrorEvent loginErrorEvent;
.cpp
loginErrorEvent.Broadcast(TEXT("hello World"));
2023-01-07 07:42:58
.h
DECLARE_DYNAMIC_MULTICAST_DELEGATE_OneParam(FLoginErrorEvent, FString, ErrorMessage);
UPROPERTY(BlueprintAssignable, Category = "Event")
FLoginErrorEvent loginErrorEvent;
.cpp
loginErrorEvent.Broadcast(TEXT("hello World"));