cocos2dx 3.x(移动修改精灵坐标MoveTo与MoveBy)

 //
 //  MainScene.cpp
 //  helloworld
 //
 //  Created by apple on 16/11/8.
 //
 //

 #include "MainScene.hpp"
 Scene * MainScene::createScene()
 {
      auto scene = Scene::create();    //创建层
     MainScene *layer = MainScene::create();
     scene->addChild(layer);
     return scene;
 }
 bool MainScene::init(){
     if (!Layer::init()) {
         return false;
     }

 //    MoveTo：把某一Sprite移动到某个位置
 //    MoveBy:把某一Sprite移动一段距离,它有一个方法reverse，它让对象按原路径返回

     /*
      *@MoveTo,移动到某个Point
      */
     Size size = Director::getInstance()->getWinSize();
     Sprite *spriteMoveTo = Sprite::create("snow.png");
     spriteMoveTo->setPosition(Vec2(size.width / 2.0f, size.height / 2.0f));
     this->addChild(spriteMoveTo, );

     ActionInterval *forward = MoveTo::create(, Vec2(, ));
     spriteMoveTo->runAction(forward);

     /*
      *MoveBy,移动一段距离
      */
     Sprite *spriteMoveBy = Sprite::create("snow.png");
     spriteMoveBy->setPosition(Vec2(size.width / 4.0f, size.height / 4.0f));
     this->addChild(spriteMoveBy, );

     ActionInterval *forwardBy = MoveBy::create(, Vec2(, ));
     ActionInterval *backBy = forwardBy->reverse();
     Action *action = Repeat::create(dynamic_cast<FiniteTimeAction *>(Sequence::create(forwardBy, backBy, NULL)), );
     spriteMoveBy->runAction(action);

     return true;
 }