说明：  提供了实现简单音频播放的audioplayer的类，需要看详细介绍的，可以到我的博客http://blog.csdn.net/mao19931004找关于QMediaplayer详解以及简易音乐播放实现的介绍
(Providing simple audio playback audioplayer the class, you need to see the details can go to my blog to find information about QMediaplayer http://blog.csdn.net/mao19931004 Detailed and simple music player to achieve)