Unreal Engine 4：学习笔记（十二）Configuration

╰半橙微兮° 2022-03-22 03:44 279阅读 0赞

### 一、设置窗口显示大小的方式 ###

1.通过代码设置

if (GEngine)
    {
        UGameUserSettings* MyGameSettings = GEngine->GetGameUserSettings();
        
        MyGameSettings->SetScreenResolution(FIntPoint(1024, 768));
        MyGameSettings->SetFullscreenMode(EWindowMode::Windowed);
        MyGameSettings->ApplySettings(false);
    }

2.通过命令行参数设置

> //以窗口形式启动游戏，窗口分辨率设为800\*600：  
> UE4Editor.exe GamentProj.uproject -WINDOWED -ResX=1024 -ResY=768 -game

3.移动窗口位置

GEngine->GameViewport->GetWindow()->MoveWindowTo(FVector2D NewPosition);

### 二、如何从配置文件中读取属性 ###

如果是要从\[ProjectDirectory\]/Config/DefaultGame.ini中读取Message属性的值

> \[/Script/ModuleName.ExampleClass\]  
> Message=This is a test.

则在C++代码中，在class前的UCLASS中设置Config=Game，在属性前的UPROPERTY中设置Config，就可以在代码中使用此属性值了

UCLASS(Config=Game)
    class AExampleClass : public AActor
    {
    GENERATED_UCLASS_BODY()
    
    UPROPERTY(Config)
    FString Message;
    
    public:
    void BeginPlay();
    };
    
    //---------------------------------------
    void AExampleClass::BeginPlay()
    {
    UE_LOG(LogTemp, Log, TEXT("message=%s"), *Message);
    };

**参考文档**

[Command-Line Arguments][]  
[Configuration Files][]

[Command-Line Arguments]: https://docs.unrealengine.com/en-US/Programming/Basics/CommandLineArguments
[Configuration Files]: https://docs.unrealengine.com/en-US/Programming/Basics/ConfigurationFiles