如何将Leaflet Routing Machine与React-Leaflet 3结合使用？

Question

react-leaflet 2.8.0 中旧的做法是使用

MapLayer

和

withLeaflet

。

但现在在反应传单中：

从版本 3 开始，

MapLayer

和

withLeaflet

已弃用。

我正在尝试掌握核心文档：https://react-leaflet.js.org/docs/core-introduction

但是以下不起作用，我明白了

提供的对象不是图层。

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

您正在使用

createLayerComponent

，但路由机实际上是一个控件。 使用

createControlComponent

。

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

具体操作方法如下：

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;

工作代码沙盒

Answer 2

// 基本传单路由机器代码 //

import React, { useEffect } from "react";
import { MapContainer, TileLayer, useMap } from "react-leaflet";
import "leaflet-routing-machine";
import L from "leaflet";
import "leaflet/dist/leaflet.css";

const Routing = ({ start, end }) => {
  const map = useMap();

  useEffect(() => {
    if (!map) return;

    // Create a routing control and add it to the map
    const routingControl = L.Routing.control({
      waypoints: [
        L.latLng(start.lat, start.lng),
        L.latLng(end.lat, end.lng),
      ],
      routeWhileDragging: true,
      lineOptions: {
        styles: [{ color: "#6FA1EC", weight: 4 }],
      },
    }).addTo(map);

    return () => {
      map.removeControl(routingControl);
    };
  }, [map, start, end]);

  return null;
};

const App = () => {
  const startPoint = { lat: 19.076, lng: 72.8777 }; // Example: Mumbai
  const endPoint = { lat: 18.5204, lng: 73.8567 }; // Example: Pune

  return (
    <MapContainer
      center={[19.076, 72.8777]}
      zoom={7}
      style={{ height: "100vh", width: "100%" }}
    >
      <TileLayer
        url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
        attribution="&copy; <a href='https://www.openstreetmap.org/copyright'>OpenStreetMap</a> contributors"
      />
      <Routing start={startPoint} end={endPoint} />
    </MapContainer>
  );
};

export default App;