planVideo: function () {

    console.log(">>>>>>>>>>planVideo>>>>>")

    var videoContext=this.data.videoContext

    var isVideoPause=!this.data.isVideoPause

    videoContext.play()

   },

  <video id="myVideo" bindloadedmetadata="bindloadedmetadata" 

   binderror="videoErrorCallback" 

   src="{{src}}" 

   bindpause="bindpause" 

   show-center-play-btn="{{false}}" 

   show-play-btn="{{false}}" 

   show-progress="{{false}}"

   show-fullscreen-btn="{{false}}" 

   controls

   custom-cache="{{false}}" 

   ></video>

<cover-image class="play-btn" src="/images/act/icon3@2x.png" bindtap="planVideo" ></cover-image>

如代码所示，点击一个图片的调用play方法，真机上不能播放,开发工具上可以