##切后台返回之后,大量音效重新播放一遍
this._handle = new BK.Audio(this._loop ? 0 : 1, this._audioPath, loop);
this._handle.startMusic();
改为
this._handle = new BK.Audio(this._loop ? 0 : 1, this._audioPath, loop);
BK.Audio.playMusic(this._loop ? 0 : 1, this._audioPath, loop);
具体原因及机制不了解,希望给大家一个参考