How to get a reference to a UI element in c++?

Question

unreal engine

Hello. I created a UI using the Blueprint class(Widget) and now I want to get a c++ reference to its elements (buttons, pictures, etc.). How can I do this?

Answer 1

Don't use NewObject to get a reference to the UUserWidget class. With this approach, BindWidget simply won't work and your widget references will be null.

Answer 2

For example, you can do this. I create a "Say Hello world" button in the blueprint widget.

Further, for example, in the C ++ class GameMode I will add a new function that will display a message on the screen.
GameMode.h

UFUNCTION(BlueprintCallable, Category = "Custom")
    void SayHello();

GameMode.cpp

void AMyGameModeBase::SayHello()
{
  GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Orange, TEXT("Hello World"));
}

We compile the project and return to the widget.
We create an event for a new button, then we turn to the current GameMod and look for our function in the Custom tab.

We check.

Everything is working.