Cocos2d-x内置了三种特殊的CCLayer
CCLayerColor
一个色块
CCLayerGradient
一个渐变色块
CCMenu
游戏菜单
将之前建立的启动界面做下修改，在init中添加菜单:
bool MainScene::init()
{
bool bRet = false;
do
{
if ( !CCLayer::init() )
{
break;
}
CCSize size = CCDirector::sharedDirector()->getWinSize();
CCSprite* back = CCSprite::create("Background/main_back.jpg");
back->setPosition(ccp(size.width * 0.5, size.height * 0.5));
this->addChild(back);
CCMenuItem* start=CCMenuItemFont::create("Start",this,menu_selector(MainScene::startGame));
CC_BREAK_IF(!start);
start->setPosition(ccp((size.width)/2, (size.height)/2));
CCMenuItem* exit=CCMenuItemFont::create("Exit",this,menu_selector(MainScene::exitGame));
CC_BREAK_IF(!exit);
exit->setPosition(ccp((size.width)/2, (size.height)/2-70));
CCMenu* menu = CCMenu::create(start,exit,NULL);
CC_BREAK_IF(!menu);
menu->setPosition(CCPointZero);
this->addChild(menu);
bRet = true;
} while (0);
return bRet;
}
添加响应事件:
void MainScene::startGame(CCObject* send)
{
CCDirector::sharedDirector()->replaceScene(GameScene::scene());
}
void MainScene::exitGame(CCObject* send)
{
CCDirector::sharedDirector()->end();//这里会报异常，不知道为啥
}
在游戏主界面GameScene中利用CCLayerColor初始化界面
CCScene* GameScene::scene()
{
CCScene * scene = NULL;
do
{
scene = CCScene::create();
CC_BREAK_IF(! scene);
CCLayerColor *layer = CCLayerColor::create(ccc4(255, 0, 255, 244));
CC_BREAK_IF(! layer);
scene->addChild(layer);
} while (0);
return scene;
}