在CParent::init()
函数内部,您可以像这样初始化CSublayer
:
// Create and initialize CSublayer
CSublayer* pSublayer= CSublayer::create();
float fWidth = pSublayer->getContentSize().width;
float fHeight = pSublayer->getContentSize().height;
pSublayer->setPosition(ccp(fWidth/2.0f, fHeight/2.0f));
this->addChild( pSublayer );
并且您的 CSublayer 可以像其他 CCLayer 一样定义。
如果您想将 CSublayer 限制为小于 CParent 层,可以在其 init 函数中执行此操作,如下所示:
CSublayer::init() {
// initialize the size with the size of the background sprite
CCSprite *pSpriteBackground = CCSprite::createWithSpriteFrame(
CCSpriteFrameCache::sharedSpriteFrameCache()->spriteFrameByName("background.png")
);
this->setContentSize(CCSize(pSpriteBackground->getContentSize().width, pSpriteBackground->getContentSize().height));
pSpriteBackground->setPosition(ccp(fScreenHalfWidth, fScreenHeight-(pSpriteBackground->getContentSize().height/2.0f)));
this->addChild(pSpriteBackground);
}