如何使用带有反应传单3的传单选路机？

Question

用MapLayer和withLeaflet来做反应的旧方法--传单2.8.0。

但现在在反应-传单：

MapLayer和withLeaflet在第3版时就不再受欢迎了。

我试图掌握核心：https://react-leaflet.js.org/docs/core-introduction的文档

但是下面这些都不起作用，我

提供的对象不是一个层。

import React, { Component, useEffect } from "react";
import { useLeafletContext, leafletElement, createLayerComponent } from '@react-leaflet/core'
import { MapContainer, TileLayer, useMap } from "react-leaflet";
import Leaflet from "leaflet";
import "leaflet-routing-machine";

function Routing(props) {
    const context = useLeafletContext();
    useEffect(() => 
    {
      let routing = createLayerComponent(Leaflet.Routing.control(
      {
        waypoints: [
          Leaflet.latLng(33.52001088075479, 36.26829385757446),
          Leaflet.latLng(33.50546582848033, 36.29547681726967)
        ],
        lineOptions: {
          styles: [{ color: "#6FA1EC", weight: 4 }]
        },
        show: false,
        addWaypoints: false,
        routeWhileDragging: true,
        draggableWaypoints: true,
        fitSelectedRoutes: true,
        showAlternatives: false
      }), )
      const container = context.layerContainer || context.map
      container.addLayer(routing)

      return () => {
        container.removeLayer(routing)
      }
    })
  return null;
}


function MapComponent() {

  return (
      <MapContainer center={[33.5024, 36.2988]} zoom={14} >
        <TileLayer url="https://api.maptiler.com/maps/ch-swisstopo-lbm-dark/256/{z}/{x}/{y}.png?key=gR2UbhjBpXWL68Dc4a3f" />
        <Routing />
      </MapContainer>
    );
  }


export default MapComponent;

Answer 1

您使用的是createLayerComponent，但是路由机实际上是一个控件。使用createControlComponent。

我还建议将其作为一个单独的自定义组件，如文档中所述，而不是将其放入useEffect中。医生很难。请随意阅读如何在react v3中扩展v3组件？，看看这是否有助于理解如何使用leaflet v3制作自定义组件。

以下是你的做法：

import L from "leaflet";
import { createControlComponent } from "@react-leaflet/core";
import "leaflet-routing-machine";

const createRoutineMachineLayer = (props) => {
  const instance = L.Routing.control({
    waypoints: [
      L.latLng(33.52001088075479, 36.26829385757446),
      L.latLng(33.50546582848033, 36.29547681726967)
    ],
    ...otherOptions
  });

  return instance;
};

const RoutingMachine = createControlComponent(createRoutineMachineLayer);

export default RoutingMachine;

工作码箱