cocos2dx 3.x(精灵的碰撞检测，点击移动与拖动精灵)

 //
 //  MainScene.hpp
 //  helloworld
 //
 //  Created by apple on 16/9/19.
 //
 //

 #ifndef MainScene_hpp
 #define MainScene_hpp

 #include <stdio.h>
 #include "cocos2d.h"
 USING_NS_CC;
 using namespace cocos2d;
 //定义一个场景类

 class MainScene : public cocos2d::Layer{

 private:
     // 成员变量(私有的)
     Size size;//注意不能用auto关键字
     Sprite *sprite1, *sprite2;//定义两个成员变量的精灵(注意不能用auto关键字
     Label *label;//全局变量Label->显示碰撞与未碰撞(注意不能用auto关键字)
 public:
     virtual bool init(); // 虚函数，返回值为布尔类型，没有函数

     static cocos2d::Scene* createScene();//static是一个类方法返回场景
     //声明点击手势
     virtual bool onTouchBegan(Touch *touch, Event *unused_event);
     //声明拖动手势
     virtual void onTouchMoved(Touch *touch, Event *unused_event);

     CREATE_FUNC(MainScene);
 };

 #endif /* MainScene_hpp */

 //
 //  MainScene.cpp
 //  helloworld
 //
 //  Created by apple on 16/9/19.
 //
 //

 #include "MainScene.hpp"
 cocos2d::Scene * MainScene::createScene()
 {
      auto scene = Scene::create();
 //    CCScene * scene = CCScene::create();// 创建场景
     //创建层
     MainScene *layer = MainScene::create();
     scene->addChild(layer);
     return scene;
 }
 bool MainScene::init(){
     if (!Layer::init()) {
         return false;
     }
     //获取屏幕大小
     size = Director::getInstance()->getVisibleSize();
     //auto size = Director::getInstance()->getWinSize();
     //添加一个图片精灵
     sprite1 = Sprite::create("CloseNormal.png");
     sprite1->setPosition(Vec2(size.width/, size.height/));
     this->addChild(sprite1);

     sprite2 = Sprite::create("CloseNormal.png");
     sprite2->setPosition(Vec2(size.width*0.4, size.height/));
     this->addChild(sprite2);

     label = Label::createWithSystemFont("No collision", "Marker Felt", );
     label->setPosition(Vec2(size.width/, size.height*0.7));
     this->addChild(label);//直接把Label显示在屏幕上

     //创建监听事件对象
     auto listener = EventListenerTouchOneByOne::create();

     //定义监听事件的回调函数
     listener->onTouchBegan = CC_CALLBACK_2(MainScene::onTouchBegan, this);
     listener->onTouchMoved = CC_CALLBACK_2(MainScene::onTouchMoved, this);

     //在事件分发器中注册
     _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);

     return true;
 }

 //点击移动精事件回调方法
 bool MainScene::onTouchBegan(Touch *touch, Event *unused_event)
 {
     //获取触屏位置（坐标）
     Point pos = touch->getLocation();

     sprite2->setPosition(pos);//把点击屏幕的触摸点（坐标）给赋值给精灵2

     log("TouchBegan");

     return true;
 }
 //拖动手势执行事件方法
 void MainScene::onTouchMoved(Touch *touch, Event *unused_event)
 {
     //获取当前拖动手势的坐标与位置
     Point pos = touch->getLocation();

     sprite2->setPosition(pos);//让精灵跟着拖动点移动

     //判断两个精灵是否相交
     if (sprite2->getBoundingBox().intersectsRect(sprite1->getBoundingBox())){    //3.0改变处
         label->setString("Collision!");//改变屏幕上Label的文字
     }else{
         label->setString("No collision");//改变屏幕上Label的文字

         log("TouchMoved");
     }
 }