1 //
 2 //  MainScene.cpp
 3 //  helloworld
 4 //
 5 //  Created by apple on 16/11/8.
 6 //
 7 //
 8 
 9 #include "MainScene.hpp"
10 Scene * MainScene::createScene()
11 {
12      auto scene = Scene::create();    //创建层
13     MainScene *layer = MainScene::create();
14     scene->addChild(layer);
15     return scene;
16 }
17 bool MainScene::init(){
18     if (!Layer::init()) {
19         return false;
20     }
21     
22     
23 //    MoveTo：把某一Sprite移动到某个位置
24 //    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
25     
26     
27     /*
28      *@MoveTo,移动到某个Point
29      */
30     Size size = Director::getInstance()->getWinSize();
31     Sprite *spriteMoveTo = Sprite::create("snow.png");
32     spriteMoveTo->setPosition(Vec2(size.width / 2.0f, size.height / 2.0f));
33     this->addChild(spriteMoveTo, 1);
34     
35     ActionInterval *forward = MoveTo::create(4, Vec2(300, 300));
36     spriteMoveTo->runAction(forward);
37     
38     
39     /*
40      *MoveBy,移动一段距离
41      */
42     Sprite *spriteMoveBy = Sprite::create("snow.png");
43     spriteMoveBy->setPosition(Vec2(size.width / 4.0f, size.height / 4.0f));
44     this->addChild(spriteMoveBy, 1);
45     
46     ActionInterval *forwardBy = MoveBy::create(2, Vec2(200, 300));
47     ActionInterval *backBy = forwardBy->reverse();
48     Action *action = Repeat::create(dynamic_cast<FiniteTimeAction *>(Sequence::create(forwardBy, backBy, NULL)), 4);
49     spriteMoveBy->runAction(action);
50     
51     
52     
53     return true;
54 }