IOS音效无法播放问题

Cocos2d-x
#1

按Home键返回桌面再进入游戏，导致音效无法播放.
安卓和电脑都没有问题
音频格式是MP3的，
有大神指导指导吗？

#2

// This function will be called when the app is inactive. Note, when receiving a phone call it is invoked.
void AppDelegate::applicationDidEnterBackground()
{
Director::getInstance()->stopAnimation();

//SimpleAudioEngine::getInstance()->pauseBackgroundMusic();

}

// this function will be called when the app is active again
void AppDelegate::applicationWillEnterForeground()
{
Director::getInstance()->startAnimation();

//SimpleAudioEngine::getInstance()->resumeBackgroundMusic();

}

SimpleAudioEngine的两行注释掉

#3

非常感谢！！！