cocos2d-x 当たり判定時にエラー

前提・実現したいこと

「cocos2d-xではじめるスマートフォンゲーム開発」という本を参考に、「自機とフルーツが重なったときにフルーツを消す」という当たり判定を実装したところエラーが出ました。
環境はcocos2d-x-4.0、Visual Studio 2019、Windows10です。
わかる方がいましたらよろしくお願いいたします。

発生している問題・エラーメッセージ

例外がスローされました:読み取りアクセス違反。
**_Mycont** が nullptr でした。

該当のソースコード

c++
1//MainScene.h
2#ifndef __KawazCatch__MainScene__
3#define __KawazCatch__MainScene__
4
5#include "cocos2d.h"
6const int WINDOW_WIDTH = 1920, WINDOW_HEIGHT = 1080;
7
8class MainScene :public cocos2d::Layer {
9protected:
10	MainScene();
11	virtual ~MainScene();
12	bool init() override;
13public:
14	static cocos2d::Scene* createScene();
15	void update(float dt);
16	CREATE_FUNC(MainScene);
17	// _player変数、getPlayer()メソッド、setPlayer(Sprite*)メソッドが自動的に自動的に実装される
18	CC_SYNTHESIZE_RETAIN(cocos2d::Sprite*, _player, Player);
19	CC_SYNTHESIZE(cocos2d::Vector<cocos2d::Sprite*>, _fruits, Fruits);
20	int kra_flg, kla_flg, kua_flg, kda_flg;
21	double PLAYER_SPEED = 10.0;
22private:
23	// フルーツの種類
24	enum class FruitType
25	{
26		APPLE,
27		GRAPE,
28		ORANGE,
29		BANANA,
30		CHERRY,
31		COUNT
32	};
33	cocos2d::Sprite* addFruit();
34	bool removeFruit(cocos2d::Sprite* fruit);
35	void catchFruit(cocos2d::Sprite* fruit);
36};
37#endif // !__KawazCatch__MainScene__
38

// MainScene.cpp
#include "MainScene.h"

USING_NS_CC;

//フルーツの画面上部からマージン(px)
const int  FRUIT_TOP_MARGIN = 40;
const int FRUIT_SPAWM_RATE = 20;

MainScene::MainScene() 
	:_player(NULL)
{
	kra_flg = 0, kla_flg = 0, kua_flg = 0, kda_flg = 0;
}

MainScene::~MainScene()
{
	// _playerをrelease
	CC_SAFE_RELEASE_NULL(_player);
}

Scene* MainScene::createScene()
{
	auto scene = Scene::create();
	auto layer = MainScene::create();
	scene->addChild(layer);
	return scene;
}

Sprite* MainScene::addFruit()
{
	// 画面サイズ取り出し
	auto winSize = Director::getInstance()->getWinSize();
	// フルーツの種類選択
	int fruitType = rand() % static_cast<int>(FruitType::COUNT);
	// フルーツを作成
	std::string filename = StringUtils::format("fruit%d.png", fruitType);
	auto fruit = Sprite::create(filename);
	fruit->setTag(fruitType);
	auto fruitSize = fruit->getContentSize();
	float fruitXPos = rand() % static_cast<int>(winSize.width);
	fruit->setPosition(Vec2(fruitXPos, winSize.height - FRUIT_TOP_MARGIN - fruitSize.height / 2.0));
	this->addChild(fruit);
	_fruits.pushBack(fruit);

	// 地面の座標
	auto ground = Vec2(fruitXPos,0);
	auto fall = MoveTo::create(3,ground);

	auto remove = CallFuncN::create([this](Node* node) {
		auto sprite = dynamic_cast<Sprite*>(node);
		this->removeFruit(sprite);
		});

	auto sequence = Sequence::Sequence::create(fall, remove, NULL);
	fruit->runAction(sequence);
	
	return fruit;

}

bool MainScene::removeFruit(cocos2d::Sprite* fruit)
{
	if (_fruits.contains(fruit)) {
		_fruits.eraseObject(fruit);
		fruit->removeFromParent();
	
		return true;
	}
	return false;
}

void MainScene::catchFruit(cocos2d::Sprite* fruit)
{
	this->removeFruit(fruit);
}

void MainScene::update(float dt)
{
	int random = rand() % FRUIT_SPAWM_RATE;
	if (random == 0) {
		this->addFruit();
	}

	for (auto fruit : _fruits) {
		Vec2 busketPosition = _player->getPosition() - Vec2(0, 10);
		Rect boundingBox = fruit->getBoundingBox();
		bool isHit = boundingBox.containsPoint(busketPosition);
		if (isHit) {
			this->catchFruit(fruit);
		}
	}

	if (this->kra_flg == 1&&_player->getPosition().x<WINDOW_WIDTH)_player->setPosition(_player->getPosition() + Vec2(PLAYER_SPEED, 0));
	if (this->kla_flg == 1&&_player->getPosition().x>0)_player->setPosition(_player->getPosition() + Vec2(-PLAYER_SPEED, 0));
	if (this->kua_flg == 1&&_player->getPosition().y<WINDOW_HEIGHT)_player->setPosition(_player->getPosition() + Vec2(0, PLAYER_SPEED)); 
	if (this->kda_flg == 1&&_player->getPosition().y>0)_player->setPosition(_player->getPosition() + Vec2(0, -PLAYER_SPEED));

}

bool MainScene::init()
{
	if (!Layer::init()) {
		return false;
	}
	
	auto director = Director::getInstance();
	auto size = director->getWinSize();

	// 背景
	auto background = Sprite::create("background2.png");
	background->setPosition(Vec2(size.width/2.0,size.height/2.0));
	this->addChild(background);

	// プレイヤー
	this->setPlayer(Sprite::create("player.png"));
	_player->setPosition(Vec2(size.width/2.0,size.height-445));
	this->addChild(_player);

	// イベントリスナー
	auto listener = EventListenerKeyboard::create();
	listener->onKeyPressed = [this](cocos2d::EventKeyboard::KeyCode keyCode, cocos2d::Event* keyEvent) {
		if (keyCode == cocos2d::EventKeyboard::KeyCode::KEY_RIGHT_ARROW) this->kra_flg = 1;
		if (keyCode == cocos2d::EventKeyboard::KeyCode::KEY_LEFT_ARROW) this->kla_flg = 1; 
		if (keyCode == cocos2d::EventKeyboard::KeyCode::KEY_UP_ARROW) this->kua_flg = 1; 
		if (keyCode == cocos2d::EventKeyboard::KeyCode::KEY_DOWN_ARROW) this->kda_flg = 1;
	};
	listener->onKeyReleased = [this](cocos2d::EventKeyboard::KeyCode keyCode, cocos2d::Event* keyEvent) {
		if (keyCode == cocos2d::EventKeyboard::KeyCode::KEY_RIGHT_ARROW) this->kra_flg = 0;
		if (keyCode == cocos2d::EventKeyboard::KeyCode::KEY_LEFT_ARROW) this->kla_flg = 0; 
		if (keyCode == cocos2d::EventKeyboard::KeyCode::KEY_UP_ARROW) this->kua_flg = 0; 
		if (keyCode == cocos2d::EventKeyboard::KeyCode::KEY_DOWN_ARROW) this->kda_flg = 0;
	};

	this->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);
	this->scheduleUpdate();

	return true;
}