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我按照这个很棒的教程添加,因为它能够将它添加到我的路由机器;但是,我想将航点保存在本地存储中并在需要时加载它们。

我在创建路由机时尝试了这个:

 if (map && !this.control) {
      this.control = L.Routing.control({
        collapsible: true,
        show: false,
        position: 'bottomleft',
        lineOptions: {
          styles: [{ color: 'chartreuse', opacity: 1, weight: 5 }]
        },
        waypoints: [null], //<--- I set the waypoints to null
        createMarker: function(i, wp, nWps) {
          if (i === 0) {
            return L.marker(wp.latLng, {
              icon: startIcon,
              draggable: true
            });
          }
          if (i === nWps - 1) {
            return L.marker(wp.latLng, {
              icon: endIcon,
              draggable: true
            });
          }
        }
      })
        .on('routingstart', this.handleLoader.bind(this))
        .on('routeselected', function(e) {
          var route = e.route;
        })
        .on('routesfound routingerror', this.handleLoader.bind(this));

然后在开始和目标事件的点击事件的初始侦听器中:

  map.on(
        'click',
        function(e) {
          var container = L.DomUtil.create('div'),
            startBtn = createButton('Start from this location', container),
            destBtn = createButton('Go to this location', container);

          function createMarkerHelper(marker) {
            setUserMarkers(marker);
          }

          L.popup()
            .setContent(container)
            .setLatLng(e.latlng)
            .openOn(map);

          L.DomEvent.on(
            startBtn,
            'click',
            function() {
              var wayPointStart = this.control.getWaypoints()[0].latLng;
              if (wayPointStart != null && userMarkers[0] !== undefined) {
                this.control.spliceWaypoints(0, 1, userMarkers[0]);
              } else {
                this.control.spliceWaypoints(0, 1, e.latlng);
                createMarkerHelper(e.latlng);
              }
              map.closePopup();
            }.bind(this)
          );

          L.DomEvent.on(
            destBtn,
            'click',
            function() {
              var wapPointDestination = this.control.getWaypoints()[1].latLng;

              if (wapPointDestination != null && userMarkers[1] !== undefined) {
                this.control.spliceWaypoints(
                  this.control.getWaypoints().length - 1,
                  1,
                  userMarkers[1]
                );
              } else {
                this.control.spliceWaypoints(
                  this.control.getWaypoints().length - 1,
                  1,
                  e.latlng
                );
                createMarkerHelper(e.latlng);
              }

              map.closePopup();
            }.bind(this)
          );
        }.bind(this)
      );

所以这就是我在一个开始click事件时尝试的:

      function() {
              var wayPointStart = this.control.getWaypoints()[0].latLng;
              if (wayPointStart != null && userMarkers[0] !== undefined) {
                this.control.spliceWaypoints(0, 1, userMarkers[0]);
              } else {
                this.control.spliceWaypoints(0, 1, e.latlng);
                createMarkerHelper(e.latlng);
              }
              map.closePopup();
            }.bind(this)

所以基本上我正在使用该getWaypoints方法来检查航路点是否为空,(它将在重新开始期间)并检查是否有任何标记在本地存储中,如果该条件为真,它自然会加载标记。如果不是真的,它只会像平常一样设置它。

然后后来 Leaflet 有一个更新功能,你可以用它来查看 props 是否发生变化:

  updateLeafletElement(fromProps, toProps) {

    var start =
        toProps.userMarkers[0] !== undefined &&
        this.control.getWaypoints()[1].latLng != null
          ? toProps.userMarkers[0]
          : null,
      destination =
        toProps.userMarkers[1] !== undefined &&
        this.control.getWaypoints()[1].latLng != null
          ? toProps.userMarkers[1]
          : null;

    this.control.spliceWaypoints(0, 1, start);
    this.control.spliceWaypoints(this.control.getWaypoints().length - 1, 1, destination);

    if (toProps.removeRoutingMachine !== false) {
      this.control.setWaypoints([]);
    }
  }

我的想法是,这将始终确保标记始终被更新。但它没有奏效。

有任何想法吗?提前致谢!

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0 回答 0