安卓播放没事 ios 播放失败  这是为啥？

const backgroundAudioManager = wx.getBackgroundAudioManager();

play(){

var that=this;

if (backgroundAudioManager.paused == false){

    backgroundAudioManager.pause()//暂停播放

    that.setData({//改变按钮状态

        palyState:false

    })

} else if (wx.getStorageSync('disciplineA')){

    backgroundAudioManager.src = that.data.indexSrc;

    that.setData({

        palyState: true

    })

}else{

backgroundAudioManager.play()//开始播放

    that.setData({//改变按钮状态

       palyState:true,

    })

    }

},