cocos2dx 背景用小尺寸图片滚动填充的方法

直接上代码

在初始化方法中添加图片：

bool BackGroundLayer::init()
{frameCache=CCSpriteFrameCache::sharedSpriteFrameCache();CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();bgCell1=CCSprite::createWithSpriteFrame(frameCache->spriteFrameByName("bgCell.png"));bgSprintArr = CCArray::create();bgSprintArr->retain();bgSignArr=CCArray::create();bgSignArr->retain();CCSize sprintSize = bgCell1->getContentSize();bgCell1->setAnchorPoint(ccp(0,0));bgCell1->setPosition(ccp(0,0));this->addChild(bgCell1);bgSprintArr->addObject(bgCell1);int flipCount=visibleSize.width/sprintSize.width+1;//多加一张图片用来滚动替换for(int i=0;i<flipCount;i++){bgCell2 = CCSprite::createWithSpriteFrame(frameCache->spriteFrameByName("bgCell.png"));bgCell2->setAnchorPoint(ccp(0,0));bgCell2->setPosition(ccp(sprintSize.width*(i+1)-(1+i),0));if(i%2==0)    //偶数
        {bgCell2->setFlipX(true);}this->addChild(bgCell2);bgSprintArr->addObject(bgCell2);}    
return true;
}

在界面刷新方法里处理：

void RunBackGroundLayer::rollBg(float delta)
{//CCSize mapSize = bgCell1->getContentSize();//本次需要滚动的像素数float moveX =delta/(1.0/60.0);CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize();CCObject* obj=NULL;CCSprite* bgCellTmp=NULL;CCSize sprintSize = bgCell1->getContentSize();//滚动和切换背景图片CCARRAY_FOREACH(bgSprintArr,obj){bgCellTmp=(CCSprite*)obj;float moveXTo = bgCellTmp->getPositionX()-moveX;bgCellTmp->setPositionX(moveXTo);if(bgCellTmp->getPositionX()<-sprintSize.width){bgCellTmp->setPositionX((bgSprintArr->count()-1)*sprintSize.width-(bgSprintArr->count()+1));if(bgSprintArr->count()%2!=0){if(bgCellTmp->isFlipX()){bgCellTmp->setFlipX(false);}else{bgCellTmp->setFlipX(true);}}}}	}

 完美实现无缝拼接滚动.