<div class="xiding-r" @click="openapp">
 Open APP
</div>

  openapp() {
  var u = navigator.userAgent,
   app = navigator.appVersion;
  var isAndroid = u.indexOf("Android") > -1 || u.indexOf("Linux") > -1;
  var isIOS = !!u.match(/\(i[^;]+;( U;)"我是安卓");
   this.android();
  }
  if (isIOS) {
   // alert("我是苹果");
  }
  },

android() {
  var _clickTime = new Date().getTime();
  window.location.href = 'zhihu://'; /***打开app的协议，有安卓同事提供***/

  //启动间隔20ms运行的定时器，并检测累计消耗时间是否超过3000ms，超过则结束
  var _count = 0, intHandle;
  intHandle = setInterval(function () {
   _count++;
   var elsTime = new Date().getTime() - _clickTime;
   if (_count >= 100 || elsTime > 5000) {
   console.log(_count)
   console.log(elsTime)
   clearInterval(intHandle);
   //检查app是否打开
   if (document.hidden || document.webkitHidden) {
    // 打开了
    window.location.href = "zhihu://";
    // alert('打开了');
    window.close();
    // return;
   } else {
    // 没打开
    // alert('没打开');
    window.location.href = "";//下载链接
   }
   }
  }, 20);
  },