Raywenderlich教程 - 太空遊戲

Question

您好，我正在瀏覽Raywenderlich的教程（http://www.raywenderlich.com/33752/），使用Eclipse for Android平臺在Cocos2d-x-2.2中創建Space Game。

我在「添加視差滾動」部分出現了問題。複製粘貼代碼後，我無法看到背景精靈。

.cpp文件

bool HelloWorld::init() 
{ 
if (!CCLayer::init()) 
{ 
    return false; 
} 

CCSize visibleSize = CCDirector::sharedDirector()->getVisibleSize(); 
CCPoint origin = CCDirector::sharedDirector()->getVisibleOrigin(); 

///////////////////////////// 
_batchNode = CCSpriteBatchNode::create("Sprites.pvr.ccz"); 
this->addChild(_batchNode); 
CCSpriteFrameCache::sharedSpriteFrameCache()->addSpriteFramesWithFile("Sprites.plist"); 

_ship = CCSprite::createWithSpriteFrameName("SpaceFlier_sm_1.png"); 
CCSize winSize = CCDirector::sharedDirector()->getWinSize(); 
_ship->setPosition(ccp(winSize.width * 0.1, winSize.height * 0.5)); 
_batchNode->addChild(_ship, 1); 
return true; 

// 1) Create the CCParallaxNode 
_backgroundNode = CCParallaxNode::create(); 
this->addChild(_backgroundNode,-1); 

// 2) Create the sprites will be added to the CCParallaxNode 
_spacedust1 = CCSprite::create("bg_front_spacedust.png"); 
_spacedust2 = CCSprite::create("bg_front_spacedust.png"); 
_planetsunrise = CCSprite::create("bg_planetsunrise.png"); 
_galaxy = CCSprite::create("bg_galaxy.png"); 
_spacialanomaly = CCSprite::create("bg_spacialanomaly.png"); 
_spacialanomaly2 = CCSprite::create("bg_spacialanomaly2.png"); 

// 3) Determine relative movement speeds for space dust and background 
CCPoint dustSpeed = ccp(0.1, 0.1); 
CCPoint bgSpeed = ccp(0.05, 0.05); 

// 4) Add children to CCParallaxNode 
_backgroundNode->addChild(_spacedust1, 0, dustSpeed, ccp(0,winSize.height/2)); 
_backgroundNode->addChild(_spacedust2, 0, dustSpeed, ccp(_spacedust1->getContentSize().width,winSize.height/2)); 
_backgroundNode->addChild(_galaxy, -1, bgSpeed, ccp(0, winSize.height * 0.7)); 
_backgroundNode->addChild(_planetsunrise, -1 , bgSpeed, ccp(600, winSize.height * 0)); 
_backgroundNode->addChild(_spacialanomaly, -1, bgSpeed, ccp(900, winSize.height * 0.3)); 
_backgroundNode->addChild(_spacialanomaly2, -1, bgSpeed, ccp(1500, winSize.height * 0.9)); 
this->scheduleUpdate(); 
} 


void HelloWorld::update(float dt) { 
CCPoint backgroundScrollVert = ccp(-1000, 0); 
_backgroundNode->setPosition(ccpAdd(_backgroundNode->getPosition(), ccpMult(backgroundScrollVert, dt))); 
} 

.h文件中

class HelloWorld : public cocos2d::CCLayer 
{ 

private: 
cocos2d::CCSpriteBatchNode * _batchNode; 
cocos2d::CCSprite * _ship; 
cocos2d::CCParallaxNode *_backgroundNode; 
cocos2d::CCSprite *_spacedust1; 
cocos2d::CCSprite *_spacedust2; 
cocos2d::CCSprite *_planetsunrise; 
cocos2d::CCSprite *_galaxy; 
cocos2d::CCSprite *_spacialanomaly; 
cocos2d::CCSprite *_spacialanomaly2; 

// scheduled Update 
void update(float dt); 

任何想法在哪裏可以在我執行錯誤？資源被正確添加，因爲正在顯示船隻。

Answer 1

有：

return true; 

在代碼的中間。