cocos2dx 3.2 实现鼠标拖动精灵移动的效果！

直接上代码，非常简单

#include "HelloWorldScene.h"

#define MOVESPEED 0.5

USING_NS_CC;

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

    // 'layer' is an autorelease object
    auto layer = HelloWorld::create();

    // add layer as a child to scene
    scene->addChild(layer);

    // return the scene
    return scene;
}

// on "init" you need to initialize your instance
bool HelloWorld::init()
{
    //////////////////////////////
    // 1. super init first
    if ( !Layer::init() )
    {
        return false;
    }

    Size visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 origin = Director::getInstance()->getVisibleOrigin();

    sprite = Sprite::create("CloseNormal.png");
    sprite->setPosition(visibleSize.width / 2, visibleSize.height / 2);
    this->addChild(sprite);
    currentPoint = sprite->getPosition();

    auto listener = EventListenerTouchOneByOne::create();
    listener->onTouchBegan = CC_CALLBACK_2(HelloWorld::onTouchBegan, this);
    listener->onTouchMoved = CC_CALLBACK_2(HelloWorld::onTouchMoved, this);
    _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);

    this->schedule(schedule_selector(HelloWorld::updatePoint));
    return true;
}

void HelloWorld::updatePoint(float dt) {
    sprite->setPosition(sprite->getPosition() + (currentPoint - sprite->getPosition())*MOVESPEED);
}

bool HelloWorld::onTouchBegan(Touch* touch, Event* event) {
    auto touchLocation = touch->getLocation();
    if (sprite->getBoundingBox().containsPoint(touchLocation)) {
        currentPoint = touchLocation;
    }
    return true;
}

void HelloWorld::onTouchMoved(Touch* touch, Event* event) {
    auto touchLocation = touch->getLocation();
//  sprite->setPosition(sprite->getPosition() + touchLocation - currentPoint);
    currentPoint = touchLocation;
}