AddToViewport problem. i really don't know why this not work!

Development Programming & Scripting UI
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1

GameModeBase.cpp

// Fill out your copyright notice in the Description page of Project Settings.


#include "MMOGameModBase.h"

void AMMOGameModBase::BeginPlay()
{
	Super::BeginPlay();

	MainMenu = CreateWidget<UUI_MainMenu>(GetWorld(), UUI_MainMenu::StaticClass());
	if (MainMenu != nullptr)
	{
		MainMenu->ToggleMainMenu(true);
	}
}

UI_MainMenu.h

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "Blueprint/UserWidget.h"

#include "UMG_Button.h"

#include "UI_MainMenu.generated.h"

/**
 * 
 */
UCLASS()
class PROJECTM_API UUI_MainMenu : public UUserWidget
{
	GENERATED_BODY()

public:

	UPROPERTY(meta = (BindWidget))
    UUMG_Button* B_NewGame;

    UPROPERTY(meta = (BindWidget))
    UUMG_Button* B_LoadGame;

    UPROPERTY(meta = (BindWidget))
    UUMG_Button* B_ExitGame;
	
    UFUNCTION()
    void ToggleMainMenu(bool bInput);
};

UI_MainMenu.cpp

// Fill out your copyright notice in the Description page of Project Settings.


#include "UI_MainMenu.h"



void UUI_MainMenu::ToggleMainMenu(bool bInput)
{
	if (bInput)
	{
		AddToViewport();
	}
	else 
	{
		RemoveFromViewport();
	}
}

This is the problem
MainMenu->ToggleMainMenu(true);
Debugging it, it arrives well to the AddToViewport(); function. But I don’t know why ican’t see it on the screen.

I already changed the game mode to my GameMode

I’m looking into this problem a lot right now, but I don’t know why it’s like this. I’ve regenerated the project file and rebooted it, but it doesn’t work at all. Help me!

2

what do you expect to see? your widget looks empty.

3

I designed ui with widget blueprints and designated its parent class as Ui_MainMenu. Is there anything I missed?

4

It seems you create the baseclass widget in gamemode and the baseclass adds itself to the viewport, but you are not using the blueprint designed child class nowhere.