滚动层容器

auto background = Sprite::create("background.png");
    background->setPosition(Vec2(visibleSize.width / 2, visibleSize.height / 2));
    Size backgroundSize = background->getContentSize();
    ScrollView * scrollview = ScrollView::create();
    //激活反弹，拉过之后可以弹回来
    scrollview->setBounceEnabled(true);
    //设置锚点
    scrollview->setAnchorPoint(Vec2::ZERO);
    //设置滚动方向为水平方向
    scrollview->setDirection(ScrollView::Direction::HORIZONTAL);
    //设置scrollview的size和背景一致
    scrollview->setContentSize(backgroundSize);
    //设置滚动层容器的内部容器大小
    scrollview->setInnerContainerSize(scrollview->getContentSize());
    //设置滚动层容器坐标
    scrollview->setPosition(Vec2((visibleSize.width - backgroundSize.width) / 2 + (backgroundSize.width - scrollview->getContentSize().width) / 2,
        (visibleSize.height - backgroundSize.height) / 2 + (backgroundSize.height - scrollview->getContentSize().height / 2)));
    this->addChild(scrollview);
    //创建一个button
    auto button = Button::create("button.png", "bnuttonpress.png");
    button->setScale9Enabled(true);
    button->setContentSize(Size(100.0f, button->getVirtualRendererSize().height));
    button->setPosition(Vec2(100,100));
scrollview->addEventListener([=](Ref * pSender, ScrollView::EventType type){
        switch (type)
        {
        case cocos2d::ui::ScrollView::EventType::SCROLL_TO_TOP:
            break;
        case cocos2d::ui::ScrollView::EventType::SCROLL_TO_BOTTOM:
            break;
        case cocos2d::ui::ScrollView::EventType::SCROLL_TO_LEFT:
            break;
        case cocos2d::ui::ScrollView::EventType::SCROLL_TO_RIGHT:
            break;
        case cocos2d::ui::ScrollView::EventType::SCROLLING:
            break;
        case cocos2d::ui::ScrollView::EventType::BOUNCE_TOP:
            break;
        case cocos2d::ui::ScrollView::EventType::BOUNCE_BOTTOM:
            break;
        case cocos2d::ui::ScrollView::EventType::BOUNCE_LEFT:
            break;
        case cocos2d::ui::ScrollView::EventType::BOUNCE_RIGHT:
            break;
        case cocos2d::ui::ScrollView::EventType::CONTAINER_MOVED:
            break;
        default:
            break;
        }
    });
    scrollview->addChild(button);