backgroundAudioManager 改变playState页面没有变化

<view @tap="play">  
                        <image v-if="!playState" class="iconbtn play" src="../../static/image/icon/play.png"></image>  
                        <image v-if="playState" class="iconbtn play" src="../../static/image/icon/pause.png"></image>  
                    </view> 

innerAudioContext.onStop(function(){  
                    this.playState==0;  
                })

pause跟play是正常的
然后我尝试在onStop里面获取其他的data也是无法获取的