cocos2d-xでモーダルレイヤとui::ScrollViewを試した

GameScene.h

#include "cocos2d.h"

#include "extensions/cocos-ext.h"
#include "ui/CocosGUI.h"

USING_NS_CC;
USING_NS_CC_EXT;
using namespace ui;

class GameScene : public cocos2d::Layer
{
protected:
    void addLayer();
public:
    static cocos2d::Scene* createScene();
    virtual bool init();
    CREATE_FUNC(GameScene);
};

GameScene.spp

#include "GameScene.h"
USING_NS_CC;

Scene* GameScene::createScene()
{
    auto scene = Scene::createWithPhysics();
    auto layer = GameScene::create();
    scene->addChild(layer);

    return scene;
}
bool GameScene::init()
{
    if (!Layer::init())
        return false;

    addLayer();
    return true;
}

#define kModalLayerPriority -1

void GameScene::addLayer(){

    auto layer = Layer::create();

    // モーダルレイヤ ここから
    auto listener = EventListenerTouchOneByOne::create();
    listener->setSwallowTouches(true);
    listener->onTouchBegan = [](Touch *touch,Event*event)->bool{
        return true;
    };
    auto dip = layer->getEventDispatcher();
    dip->addEventListenerWithSceneGraphPriority(listener, this);
    dip->setPriority(listener, kModalLayerPriority);
    // モーダルレイヤ ここまで

    auto size = Director::getInstance()->getVisibleSize();
    ui::ScrollView* sc = ui::ScrollView::create();
    sc->setContentSize(size);
    sc->setBackGroundColor(Color3B::GREEN);
    sc->setBackGroundColorType(Layout::BackGroundColorType::SOLID);
    sc->setBounceEnabled(true);
    sc->setDirection(ui::ScrollView::Direction::VERTICAL);
    sc->setContentSize(Size(480,size.height));
    sc->setInnerContainerSize(Size(480, sc->getContentSize().height + 300 ));

    sc->setPosition(Vec2(0,size.height - sc->getContentSize().height ));


    Button* button = Button::create("button.png");
    button->setPosition(Vec2(button->getContentSize().width / 2.0f,
                             sc->getContentSize().height - button->getContentSize().height / 2.0f));
    sc->addChild(button);

    layer->addChild(sc);
    addChild(layer);
}