【雷电】源码分析（1）- 进入游戏攻击

【雷电】源码分析（一）-- 进入游戏攻击

效果图：

程序分析：

初始化GameLayer场景触摸，背景、音乐、UI及定时间器
bool GameLayer::init()
{
    if (!CCLayer::init()) {
        return false;
    }
    // 开启触摸
    this->setTouchEnabled(true);
    
    // 创建数组，需要retain一下
    play_bullet = CCArray::create();
    play_bullet->retain();
    
    enemy_bullet = CCArray::create();
    enemy_bullet->retain();
    
    enemy_items = CCArray::create();
    enemy_items->retain();
    
    m_state = statePlaying;//游戏开始，状态为0
    
    Enemy::sharedEnemy();//缓存敌军飞船
    Effect::sharedExplosion();//爆炸动画缓存
    
    Config::sharedConfig()->resetConfig();//初始化分数为0、命数3条
    
    winSize = CCDirector::sharedDirector()->getWinSize();
    m_levelManager = new LevelManager(this);
    
    //初始化背景
    initBackground();

    m_screenRec = CCRectMake(0, 0,  winSize.width, winSize.height + 10);
    
    // 创建score
    m_lbScore = CCLabelBMFont::create("Score:0", s_arial14_fnt);
    m_lbScore->setAnchorPoint(ccp(1, 0));
    m_lbScore->setAlignment(kCCTextAlignmentRight);//右对齐
    addChild(m_lbScore, 1000);
    m_lbScore->setPosition(winSize.width - 5, winSize.height - 30);
    
    // ship life
    CCTexture2D *shipTexture = CCTextureCache::sharedTextureCache()->addImage(s_ship01);
    CCSprite *life = CCSprite::createWithTexture(shipTexture, CCRectMake(0, 0, 60, 38));
    life->setScale(0.6);
    life->setPosition(ccp(30,winSize.height-23));
    addChild(life, 1, 5);
    
    // 显示生命条数
    char lifecount[2];
    sprintf(lifecount, "%d",Config::sharedConfig()->getLifeCount());
    m_lifeCount = CCLabelTTF::create(lifecount, "Arial", 20);
    m_lifeCount->setPosition(ccp(60, winSize.height-20));
    m_lifeCount->setColor(ccc3(255,0, 0));
    addChild(m_lifeCount, 1000);
    
    // 创建飞船
    m_ship = Ship::create();
    addChild(m_ship, m_ship->getZoder(), 1001);
    
	//游戏暂停按钮
    CCMenuItemImage *pause = CCMenuItemImage::create("pause.png", "pause.png", this, menu_selector(GameLayer::doPause));
    pause->setAnchorPoint(ccp(1, 0));
    pause->setPosition(ccp(winSize.width, 0));
    CCMenu *menu = CCMenu::create(pause, NULL);
    menu->setAnchorPoint(ccp(0, 0));
    addChild(menu, 1, 10);
    menu->setPosition(CCPointZero);
    
    // 调 update函数
    scheduleUpdate();
    
    // 每秒调一次 scoreCounter函数
    schedule(schedule_selector(GameLayer::scoreCounter), 1);
    
    if (Config::sharedConfig()->getAudioState()) {//背景音乐
        SimpleAudioEngine::sharedEngine()->playBackgroundMusic(s_bgMusic, true);
    }
    
    return true;
}