cocos2d-x 背景音乐播放

Code

// on "init" you need to initialize your instance

bool HelloWorld::init()

{

    
bool bRet = 
false;

    
do

    {

        
//////////////////////////////////////////////////////////////////////////
        
// super init first
        
//////////////////////////////////////////////////////////////////////////

CC_BREAK_IF(! CCLayer::init());

        
//MYCode
        CCSize size = CCDirector::sharedDirector()->getWinSize();

        setTouchEnabled(
true);

std::string items[] =

        {

            
"play background music",

            
"stop background music",

            
"pause background music",

            
"resume background music",

            
"rewind background music",

        };

        CCMenu *menu = CCMenu::create();

        
int count = 
sizeof(items) / 
sizeof(items[
]);

        
for(
int i = 
; i < count; i++)

        {

            CCLabelTTF *label = CCLabelTTF::create(items[i].c_str(), 
"Arial", 
);

            CCMenuItemLabel *pMenuItem = CCMenuItemLabel::create(label, 
this, menu_selector(HelloWorld::menuCallback));

            menu->addChild(pMenuItem, i + 
); 
//note
        }

        menu->setPosition(ccp(size.width / 
, size.height / 
));

        menu->alignItemsVertically();

        addChild(menu);

//preload background music
        CocosDenshion::SimpleAudioEngine::sharedEngine()->preloadBackgroundMusic(CCFileUtils::sharedFileUtils()->fullPathFromRelativePath(MUSIC_FILE));

//set default volume
        CocosDenshion::SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(
.
);

bRet = 
true;

    }

    
while (
);

return bRet;

}


void HelloWorld::menuCallback(CCObject *pSender)

{

    CCMenuItem *pMenuItem = (CCMenuItem *)(pSender);

    
int index = pMenuItem->getZOrder() - 
;

    
switch(index)

    {

    
case 
:

        CocosDenshion::SimpleAudioEngine::sharedEngine()->playBackgroundMusic(std::string(CCFileUtils::sharedFileUtils()->fullPathFromRelativePath(MUSIC_FILE)).c_str(), 
true);

        
break;

    
case 
:

        CocosDenshion::SimpleAudioEngine::sharedEngine()->stopBackgroundMusic();

        
break;

    
case 
:

        CocosDenshion::SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();

        
break;

    
case 
:

        CocosDenshion::SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();

        
break;

    
case 
:

        CocosDenshion::SimpleAudioEngine::sharedEngine()->rewindBackgroundMusic();

        
break;

    }

}

注意SimpleAudioEngine前面需要加上CocosDenshion的前缀，否则会报错。

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