Cocos2dx/ScrollView

サンプル

下半分に複数行ラベルを表示 -HelloworldScene.cpp

auto visibleSize = Director::getInstance()->getVisibleSize();
Vec2 origin = Director::getInstance()->getVisibleOrigin(); // origin.x = 0; origin.y = 25
std::string text = "Hello World\nHello World2\n2\n2\n2\n2\n2\n2\n3\n3\n3\n3\n3\n3\n3\n4\n4\n5\n5\n5\n";
auto labelResult = Label::createWithTTF(text, "fonts/Marker Felt.ttf", 10);
labelResult->setPosition(Vec2(origin.x + labelResult->getContentSize().width / 2,
                              labelResult->getContentSize().height / 2));
ScrollView* scroll = ScrollView::create();
scroll->setContentSize(Size(labelResult->getContentSize().width, visibleSize.height / 2));
scroll->setInnerContainerSize(Size(labelResult->getContentSize().width, labelResult->getContentSize().height));
scroll->setDirection(ScrollView::Direction::VERTICAL); // 縦方向だけにスクロール
scroll->setPosition(Vec2(origin.x - scroll->getContentSize().width / 2 + visibleSize.width / 2, origin.y));
scroll->addChild(labelResult, 1);
addChild(scroll);

参考

https://iscene.jimdo.com/2015/03/17/cocos2d-x-ver-3-x-%E8%A4%87%E6%95%B0%E8%A1%8C%E3%81%AE%E3%83%86%E3%82%AD%E3%82%B9%E3%83%88%E8%A1%A8%E7%A4%BA%E3%82%92%E3%81%99%E3%82%8B%E3%83%86%E3%82%AD%E3%82%B9%E3%83%88%E3%83%93%E3%83%A5%E3%83%BC%E3%81%AE%E4%BD%9C%E6%88%90-uitextview%E3%81%AE%E4%BB%A3%E7%94%A8/