Actor 的 InputListener

Question

我有一个问题，当我按下任意键时，Actor 中永远不会触发 keyDown 事件。不过，touchDown（用于鼠标点击）有效。

演员代码：

public class MapActor extends Actor {
    private TiledMap map;
    private OrthogonalTiledMapRenderer renderer;
    private int directions = 0;
    private OrthographicCamera camera;

    public MapActor(String pathToMap, OrthographicCamera camera) {
        TmxMapLoader loader = new TmxMapLoader();
        map = loader.load(pathToMap);
        renderer = new OrthogonalTiledMapRenderer(map);
        this.camera = camera;

        this.setBounds(0, 0, 500, 500);
        this.addListener(new InputListener() {
            // a - 29, w - 51, d - 32, s - 47
            @Override
            public boolean keyDown(InputEvent event, int keycode) {
                System.out.println("Test");
                return true;
            }


            @Override
            public boolean touchDown(InputEvent event, float x, float y, int pointer, int button) {
                Gdx.app.log("Touch", "touch down");
                return true;
            }
        });
    }

    @Override
    public void act(float delta) {
    }

    @Override
    public void draw(Batch batch, float parentAlpha) {
        super.draw(batch, parentAlpha);
        batch.end();
        renderer.setView(camera);
        renderer.render();
        batch.begin();
    }

    public void dispose()   {
        renderer.dispose();
        map.dispose();
    }
}

这是我将 Actor 添加到 Stage 的方法：

@Override
public void create () {
    stage = new Stage(new ScreenViewport());
    Gdx.input.setInputProcessor(stage);

    MapActor mapActor = new MapActor("maps/testmap.tmx", (OrthographicCamera) stage.getCamera());
    stage.addActor(mapActor);

}

欢迎提出任何建议。

Answer 1

只有拥有键盘焦点的actor才会接收键盘事件。

要设置哪个actor有键盘焦点，可以使用以下...

    `Stage.setKeyboardFocus(Actor actor);`

从那时起，键盘事件将被传递给指定的actor。