让我们一起来看看cocos2dx 3.2制作Flappy Bird实践建WelcomeScene欢迎场景。首先，建立WelcomeScene类，作为游戏的第一个场景：

#ifndef __WELCOME_SCENE_H__

#define __WELCOME_SCENE_H__

#include “cocos2d.h”

#include “Land.h”

class WelcomeScene : public cocos2d:ayer

{

public:

// there’s no ‘id’ in cpp, so we recommend returning the class instance pointer

static cocos2d::Scene* createScene();

// Here’s a difference. Method ‘init’ in cocos2d-x returns bool, instead of returning ‘id’ in cocos2d-iphone

virtual bool init();

// a selector callback

void menuCloseCallback(cocos2d::Ref* pSender);

// implement the “static create()” method manually

CREATE_FUNC(WelcomeScene);

void startGame();//切换到游戏场景

};

#endif // __HELLOWORLD_SCENE_H__

#include “WelcomeScene.h”

USING_NS_CC;

Scene* WelcomeScene::createScene()

{

// ‘scene’ is an autorelease object

auto scene = Scene::createWithPhysics();

// ‘layer’ is an autorelease object

auto layer = WelcomeScene::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 WelcomeScene::init()

{

//////////////////////////////

// 1. super init first

if ( !Layer::init() )

{

return false;

}

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

Point origin = Director::getInstance()->getVisibleOrigin();

//加载Plist

SpriteFrameCache::getInstance()->addSpriteFramesWithFile(“D:\\hello\\Bird\\proj.win32\\res\\birdSucai.plist”,”D:\\hello\\Bird\\proj.win32\\res\\birdSucai.png”);

//添加背景

auto bg = Sprite::createWithSpriteFrameName(“bg_day.png”);

bg->setPosition(visibleSize.width/2,visibleSize.height/2);

addChild(bg);

//添加标题

auto title = Sprite::createWithSpriteFrameName(“title.png”);

title->setPosition(visibleSize.width/2,visibleSize.height/2+100);

addChild(title);

//添加小鸟动画

auto bird_animation = Animation::create();

bird_animation->setDelayPerUnit(0.1f);

bird_animation->addSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName(“bird0_0.png”));

bird_animation->addSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName(“bird0_1.png”));

bird_animation->addSpriteFrame(SpriteFrameCache::getInstance()->getSpriteFrameByName(“bird0_2.png”));

auto bird_animate = Animate::create(bird_animation);

auto repeat = RepeatForever::create(bird_animate);

auto bird = Sprite::createWithSpriteFrameName(“bird0_0.png”);

bird->setPosition(visibleSize.width/2,visibleSize.height/2);

bird->runAction(repeat);

addChild(bird);

//添加菜单项

auto menuImage = Sprite::createWithSpriteFrameName(“button_play.png”);

auto start_btn = MenuItemSprite::create(menuImage,menuImage,CC_CALLBACK_0(WelcomeScene::startGame,this));

auto menu = Menu::create(start_btn,NULL);

menu->setAnchorPoint(Point::ANCHOR_BOTTOM_LEFT);

menu->setPosition(Point(80,150));

this->addChild(menu);

auto menuImage2 = Sprite::createWithSpriteFrameName(“button_score.png”);

auto end_btn = MenuItemSprite::create(menuImage2,menuImage2,CC_CALLBACK_1(WelcomeScene::menuCloseCallback,this));

auto menu2 = Menu::create(end_btn,NULL);

menu2->setAnchorPoint(Point::ANCHOR_BOTTOM_LEFT);

menu2->setPosition(Point(200,150));

this->addChild(menu2);

//添加陆地

auto land = Land::create();

land->landMove(1);

addChild(land);

//添加版权

auto copyRight = Sprite::createWithSpriteFrameName(“brand_copyright.png”);

copyRight->setPosition(visibleSize.width/2,80);

addChild(copyRight);

return true;

}

void WelcomeScene::startGame()

{

}

void WelcomeScene::menuCloseCallback(Ref* pSender)

{

#if (CC_TARGET_PLATFORM == CC_PLATFORM_WP8) || (CC_TARGET_PLATFORM == CC_PLATFORM_WINRT)

MessageBox(“You pressed the close button. Windows Store Apps do not implement a close button.”,”Alert”);

return;

#endif

Director::getInstance()->end();

#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)

exit(0);

#endif

}