15c++呵呵老师【使用UMG的用户界面】

1.在HowTo_UMG.Build.cs中 ，写如下代码

using UnrealBuildTool;
 
public class HowTo_UMG : ModuleRules
{
	public HowTo_UMG(ReadOnlyTargetRules Target) : base(Target)
	{
		PCHUsage = PCHUsageMode.UseExplicitOrSharedPCHs;
	
		PublicDependencyModuleNames.AddRange(new string[] { "Core", "CoreUObject", "Engine", "InputCore" , "UMG" });
 
		PrivateDependencyModuleNames.AddRange(new string[] {  });
 
		//Uncomment if you are using Slate UI
		 PrivateDependencyModuleNames.AddRange(new string[] { "Slate", "SlateCore" });
		
		// Uncomment if you are using online features
		// PrivateDependencyModuleNames.Add("OnlineSubsystem");
 
		// To include OnlineSubsystemSteam, add it to the plugins section in your uproject file with the Enabled attribute set to true
	}
}

2.在HowToUMGGameMode.h中声明变量和函数

#include "CoreMinimal.h"
#include "GameFramework/GameModeBase.h"
#include "Blueprint/UserWidget.h"
#include "HowTo_UMGGameModeBase.generated.h"
 
/**
 * 
 */
UCLASS()
class HOWTO_UMG_API AHowTo_UMGGameModeBase : public AGameModeBase
{
	GENERATED_BODY()
public:
	/** 移除当前菜单控件，并在指定类（如有）中新建控件。*/
	UFUNCTION(BlueprintCallable, Category = "UMG Game")
		void ChangeMenuWidget(TSubclassOf NewWidgetClass);
 
protected:
	/** 游戏开始时调用。*/
	virtual void BeginPlay() override;
 
	/** 游戏开始时，用作菜单的控件类。*/
	UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = "UMG Game")
		TSubclassOf StartingWidgetClass;
 
	/** 用作菜单的控件实例。*/
	UPROPERTY()
		UUserWidget* CurrentWidget;
};

3.在源文件中定义

#include "HowTo_UMGGameModeBase.h"
 
void AHowTo_UMGGameModeBase::BeginPlay()
{
	Super::BeginPlay();
	ChangeMenuWidget(StartingWidgetClass);
}
 
void AHowTo_UMGGameModeBase::ChangeMenuWidget(TSubclassOf NewWidgetClass)
{
	if (CurrentWidget != nullptr)
	{
		//将控件放到屏幕上
		CurrentWidget->RemoveFromViewport();
		CurrentWidget = nullptr;
	}
	if (NewWidgetClass != nullptr)
	{
		//创建控件
		CurrentWidget = CreateWidget(GetWorld(), NewWidgetClass);
		if (CurrentWidget != nullptr)
		{
			//放到屏幕上
			CurrentWidget->AddToViewport();
		}
	}
}

4.创建玩家控制器类HowTo_UMGPlayerController

头文件

#include "CoreMinimal.h"
#include "GameFramework/PlayerController.h"
#include "HowTo_UMGPlayerController.generated.h"
 
/**
 * 
 */
UCLASS()
class HOWTO_UMG_API AHowTo_UMGPlayerController : public APlayerController
{
	GENERATED_BODY()
 
public:
	virtual void BeginPlay() override;
	
};

源文件

#include "HowTo_UMGPlayerController.h"
 
void AHowTo_UMGPlayerController::BeginPlay()
{
	Super::BeginPlay();
	SetInputMode(FInputModeGameAndUI());
}

===========================

创建ui蓝图MainMenu，加两个按钮

 并分别创建点击事件

===========================

配置游戏

1.创建游戏模式类的蓝图

 

 

2.创建 PlayerController 的蓝图 ，命名为MenuPlayerController

3.打开该MenuPlayerController蓝图，并设置显示光标

 

 4.编辑MenuGameMode蓝图

5.打开场景设置，设置游戏模式蓝图

======================================

构建二级UI

1.创建ui蓝图，NewGameMenu  

分别设置点击事件