cocos2d-x button not working?

Question

Game development

Good afternoon!
Started learning cocos2d-x. I'm trying to add a button and hang up a function on pressing, but nothing works.

#include "HelloWorldScene.h"
#include "MenuLay.h"
#include "ui/CocosGUI.h"
#include <iostream>

USING_NS_CC;

Scene* HelloWorld::createScene()
{
  // 'scene' is an autorelease object
  auto scene = Scene::create();
  auto layer = HelloWorld::create();

  scene->addChild(layer);

  return scene;
}


void HelloWorld::addSprite() {
  auto myspr = Sprite::create("mario.png");
  this->addChild(myspr);
}

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

  auto button = ui::Button::create("CloseNormal.png", "CloseSelected.png", "CloseSelected.png");

  button->setTitleText("Spawn");
  button->setPosition(Vec2(100,100));

  button->addTouchEventListener([&](Ref* sender, ui::Widget::TouchEventType type)
    {
      switch (type)
      {
      case cocos2d::ui::Widget::TouchEventType::BEGAN:
        break;
      case cocos2d::ui::Widget::TouchEventType::MOVED:
        break;
      case cocos2d::ui::Widget::TouchEventType::ENDED:
        addSprite();
        break;
      case cocos2d::ui::Widget::TouchEventType::CANCELED:
        break;
      default:
        break;
      }
    });

  this->addChild(button);



  return true;
}

Please explain what is wrong.