Cocos2d 播放音效

Cocos2D对音乐/音效播放的封装已经很好了，下边是例子：

定义2个文件：

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1. #define MUSIC_FILE        "LOLBgMusic.mp3"
2. #define EFFECT_FILE      "Attack.wav"

在初始化的时候预加载音乐/音效文件：

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1. //预加载
2. CocosDenshion::SimpleAudioEngine::sharedEngine()->preloadBackgroundMusic(MUSIC_FILE);
3. CocosDenshion::SimpleAudioEngine::sharedEngine()->preloadEffect( EFFECT_FILE );
4. //设置音量
5. CocosDenshion::SimpleAudioEngine::sharedEngine()->setEffectsVolume(0.5);
6. CocosDenshion::SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(0.5);

播放：

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1. //循环播放背景音乐，
2. CocosDenshion::SimpleAudioEngine::sharedEngine()->playBackgroundMusic(MUSIC_FILE,true);

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1. //播放音效
2. CocosDenshion::SimpleAudioEngine::sharedEngine()->playEffect(EFFECT_FILE);

其他相关函数：

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1. // stop background music
2. SimpleAudioEngine::sharedEngine()->stopBackgroundMusic();
3. // pause background music
4. SimpleAudioEngine::sharedEngine()->pauseBackgroundMusic();
5. // resume background music
6. SimpleAudioEngine::sharedEngine()->resumeBackgroundMusic();
7. // rewind background music
8. SimpleAudioEngine::sharedEngine()->rewindBackgroundMusic();
9. // is background music playing
10. SimpleAudioEngine::sharedEngine()->isBackgroundMusicPlaying()
11. // add bakcground music volume
12. SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(SimpleAudioEngine::sharedEngine()->getBackgroundMusicVolume() + 0.1f);
13. SimpleAudioEngine::sharedEngine()->pauseEffect(m_nSoundId);
14. SimpleAudioEngine::sharedEngine()->resumeEffect(m_nSoundId);
15. SimpleAudioEngine::sharedEngine()->pauseAllEffects();
16. SimpleAudioEngine::sharedEngine()->resumeAllEffects();
17. SimpleAudioEngine::sharedEngine()->stopAllEffects();