// 尝试唤起百度地图 app
  window.location.href = scheme;
  var timeout = 600;
  var startTime = Date.now();
  var t = setTimeout(function () {
    var endTime = Date.now();
    // 当成功唤起百度地图 app 后，再返回到 h5 页面，这时 endTime - startTime 一定大于 timeout + 200； 如果唤起失败, 打开 web 端百度地图导航
    if (!startTime || (endTime - startTime) < (timeout + 200)) {
       window.location.href = 'http://api.map.baidu.com/direction' + queryStr + '&output=html';
    }
  }, timeout);

  var startTime = Date.now();
  var count = 0;
  var endTime = 0;
  var t = setInterval(function () {
    count += 1;
    endTime = Date.now() - startTime;
    if (endTime > 800) {
      clearInterval(t);
    }
    if (count < 30) return;
    if (!(document.hidden || document.webkitHidden)) {
      window.location.href = 'http://api.map.baidu.com/direction' + queryStr + '&output=html';
    }
  }, 20);

  function wakeBaidu() {
    var geolocation = new BMap.Geolocation();
    geolocation.getCurrentPosition(function (result) {
      if (this.getStatus() == BMAP_STATUS_SUCCESS) {
        var latCurrent = result.point.lat; //获取到的纬度
        var lngCurrent = result.point.lng; //获取到的经度
        if (latCurrent && lngCurrent) {
          var scheme = '';
          
          // urlObject 是我这边地址栏查询参数对象
          var queryStr = '?origin=name:我的位置|latlng:' + latCurrent + ',' + lngCurrent + '&destination=' + urlObject.lat + ',' + urlObject.lng + '&region=' + urlObject.city + '&coord_type=bd09ll&mode=driving';

          if (isIOS()) {
            // ios 端
            scheme = 'baidumap://map/direction' + queryStr;
          } else {
            // android 端
            scheme = 'bdapp://map/direction' + queryStr;
          }

          // 主要实现代码
          window.location.href = scheme;
          
          var startTime = Date.now();
          var count = 0;
          var endTime = 0;
          
          var t = setInterval(function () {
            count += 1;
            endTime = Date.now() - startTime;
            if (endTime > 800) {
              clearInterval(t);
            }
            if (count < 30) return;
            if (!(document.hidden || document.webkitHidden)) {
              window.location.href = 'http://api.map.baidu.com/direction' + queryStr + '&output=html';
            }
          }, 20);

          window.onblur = function () {
            clearInterval(t);
          };
        } else {
          alert('获取不到定位，请检查手机定位设置');
        }
      }
    });
  }