html为什么视频不能自动播放（html5中嵌入视频自动播放的问题解决）

<video v-show="os!=='iOS'"
               class="video"
               preload="auto"
               autoplay
               loop muted
               webkit-playsinline="true"
               playsinline="true"
               @loadstart="videoLoadStart"
               @canplaythrough="videoLoaded"
               poster="./images/cover.png"
               ref="videoEle"
               id="android"
        >
          <source :src="src" type="video/mp4">
 
        </video>
　　videoLoaded(){
　　　　this.$refs.videoEle.play();
　　}

<video ref="video"  id="video" preload="metadata" :src="videoSrc[videoIndex]" :poster="preSrc[videoIndex]" webkit-playsinline playsinline>
</video>


data(){
preSrc:[
  require("./images/pre1.png"),
  require("./images/video-pre.jpg")
],
videoSrc:[
  require("./images/invader-video.mp4"),
  require("./images/brithday.mp4")
],

}