Cocos2d 之FlyBird开发---MainMenu类

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　　MainMenu类主要实现的是游戏主界面的布局，它相当于一个港口，有开向各处的航道，而游戏中的MainMenu则是有跳转到各个场景的一个集合点。

　　下面贴上代码：

MainMenu.h

#ifndef _MAIN_MENU_H_

#define _MAIN_MENU_H_

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

//            这里主要的是实现主界面的一些操作

#include "cocos2d.h"

USING_NS_CC;

class MainMenu : public cocos2d::Layer

{

private:

     cocos2d::Sprite* background;

     cocos2d::MenuItemImage* playItem;

     cocos2d::MenuItemImage* scoreItem;

     cocos2d::MenuItemImage* aboutItem;

     cocos2d::MenuItemImage* exitItem;

     cocos2d::Sprite* logo;

     cocos2d::Sprite* bird;

     cocos2d::Sprite* land;

public:

     static cocos2d::Scene* createScene();

     virtual bool init();

     void interfaceLayout();

     void goPlay(cocos2d::Ref*);

     void goScore(cocos2d::Ref*);

     void goAbout(cocos2d::Ref*);

     void goExit();

     CREATE_FUNC(MainMenu);

};

#endif // _MAIN_MENU_H_

MainMenu.cpp

#include "MainMenu.h"

#include "GameUnit.h"

#include "GameAbout.h"

#include "GameScore.h"

#include "GamePlay.h"

#include "GameData.h"

unit u;

//创建一个游戏场景

cocos2d::Scene* MainMenu::createScene()

{

     auto scene = Scene::create();

     auto layer = MainMenu::create();

     scene->addChild(layer);

     return scene;

}

//初始化

bool MainMenu::init()

{

     if (!Layer::init())

     {

              return false;

     }

     //设置主界面的背景音乐

     //初始化游戏数据

     if (!GameData::getGameData())

     {

              GameData::initGameData();

     }

     //布局主界面

     this->interfaceLayout();

     return true;

}

//游戏界面布局

void MainMenu::interfaceLayout()

{

     //1: add background

     background = Sprite::create("background/light.png");

     background->setPosition(Vec2(u.winOrigin().x + u.winSize().width / 2,

              u.winOrigin().y + u.winSize().height / 2));

     background->setScale(u.scaleX(background, u.winSize()),

              u.scaleY(background, u.winSize()));

     this->addChild(background, 0);

     //2: add FlyBird logo

     logo = Sprite::create("logo/title.png");

     logo->setPosition(Vec2(u.winOrigin().x + u.winSize().width / 2,

              u.winOrigin().y + u.winSize().height - 2 * logo->getContentSize().height));

     logo->setScale(1.5);

     this->addChild(logo, 1);

     //3: add wall

     land = Sprite::create("background/land.png");

     land->setPosition(Vec2(u.winOrigin().x + u.winSize().width / 2,

              u.winOrigin().y + land->getContentSize().height / 2));

     land->setScaleX(u.winSize().width / 1.5*land->getContentSize().width);

     //land->setScaleY(1.5*u3.winSize().height / backgroundA->getContentSize().height);

     land->setScaleY(u.winSize().height / (land->getContentSize().height * 3));

     this->addChild(land);

     //4: add bird animation

     bird = Sprite::create("bird/littleBird.png");

     bird->setPosition(Vec2(u.winOrigin().x + u.winSize().width / 2,

              u.winOrigin().y + (u.winSize().height / 3) * 2));

     bird->setScale(2);

     auto repeat = RepeatForever::create(Animate::create(u.gameAnimate(1)));

     bird->runAction(repeat);

     this->addChild(bird);

     //5: add about button

     aboutItem = MenuItemImage::create(

              "button/about.png",

              "button/buttom.png",

              CC_CALLBACK_1(MainMenu::goAbout, this));

     aboutItem->setPosition(Vec2(u.winOrigin().x + u.winSize().width - aboutItem->getContentSize().width / 2,

              u.winOrigin().y + aboutItem->getContentSize().height / 2));

     auto m = Menu::create(aboutItem, NULL);

     m->setPosition(Vec2::ZERO);

     this->addChild(m, 2);

     //6: add play button

     playItem = MenuItemImage::create(

              "button/play.png",

              "button/play.png",

              CC_CALLBACK_1(MainMenu::goPlay, this)

              );

     //7: add score button

     scoreItem = MenuItemImage::create(

              "button/score.png",

              "button/score.png",

              CC_CALLBACK_1(MainMenu::goScore, this)

              );

     auto menu = Menu::create(playItem, scoreItem, NULL);

     menu->alignItemsHorizontallyWithPadding(10);

     menu->setPosition(u.winOrigin().x + u.winSize().width - menu->getContentSize().width/4,

              u.winOrigin().y + 1.7*menu->getContentSize().height/3);

     menu->setScale(1.5);

     this->addChild(menu, 2);

     //exit

     exitItem = MenuItemImage::create(

              "button/exit_f.png",

              "button/exit_b.png",

              CC_CALLBACK_0(MainMenu::goExit, this)

              );

     Menu* exitMenu = Menu::create(exitItem, NULL);

     exitMenu->setPosition(Vec2(u.winOrigin().x + exitItem->getContentSize().width / 2,

              u.winOrigin().y + exitItem->getContentSize().height / 2));

     this->addChild(exitMenu, 7);

}

void MainMenu::goPlay(cocos2d::Ref* pSender)

{

     Director::getInstance()->replaceScene(TransitionFadeTR::create(1,

              GamePlay::createScene()));

}

void MainMenu::goScore(cocos2d::Ref* pSender)

{

     Director::getInstance()->replaceScene(TransitionFadeTR::create(1,

              GameScore::createScene()));

}

void MainMenu::goAbout(cocos2d::Ref* pSender)

{

     Director::getInstance()->replaceScene(TransitionFadeTR::create(1,

              GameAbout::createScene()));

}

void MainMenu::goExit()

{

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

}

每个函数的功能见：Cocos2d之FlyBird开发---简介

效果图：