react-leaflet <GeoJSON /> pointToLayer 选项来更改图标

Question

我当前正在尝试学习反应，我想使用传单映射（react-Leaflet）。

我有两个（point，polygon）我想显示的geojson对象，但我想替换默认标记图标。

传单文档http://leafletjs.com/examples/geojson/告诉我使用Pointtolayer选项。

代码：

OneachFeaturePoint，OneachFeaturePolygon，Pointtolayer

onEachFeaturePoint(feature, layer) {
  console.log('feature: ', feature);
  console.log('layer: ', layer);
  layer.on({
    'click': function (e) {
       console.log('e: ', e);
       console.log('click');
     }
  })
}
onEachFeaturePolygon(feature, layer) {
  console.log('feature: ', feature);
  console.log('layer: ', layer);
  layer.on({
    'click': function (e) {
       console.log('e: ', e);
       console.log('click');
     }
  })
}
pointToLayer(feature, latlng) {
  console.log('--- Point to layer');
  console.log('feature: ', feature);
  console.log('latlng: ', latlng);
  return <CircleMarker center={latlng} />;
}

渲染

render() {
  const center = [9.4921875, 51.83577752045248];
  return (
    <Map center={center} zoom={1}>
      <GeoJSON ref='marker1' data={this.state.point} onEachFeature={this.onEachFeaturePoint.bind(this)} pointToLayer={this.pointToLayer.bind(this)} />
      <GeoJSON ref='polygon1' data={this.state.polygon} onEachFeature={this.onEachFeaturePolygon.bind(this)} />
    </Map>
  )
}

如果我保持pointToLayer={this.pointToLayer.bind(this)}，它停止处理以下错误：

Uncaught TypeError: layer.on is not a function
    at CustomMarker.onEachFeaturePoint (MapDemo.js:73)
    at NewClass.addData (leaflet-src.js:10455)
    at NewClass.addData (leaflet-src.js:10435)
    at NewClass.initialize (leaflet-src.js:10420)
    at new NewClass (leaflet-src.js:310)
    at L.geoJSON (leaflet-src.js:10732)

我无法弄清楚为什么发生错误，也许有人有一个想法解决这个问题或帮助我理解我犯的错误。

编辑：通过用pointToLayer功能中的return L.circleMarker()替换return <CirleMarker />，我可以工作。

Answer 1

通过用pointToLayer功能中的return L.circleMarker()替换return <CirleMarker />，我让它工作。

import L from 'leaflet';
...
pointToLayer(feature, latlng) {
   return L.circleMarker(latlng, null); // Change marker to circle
   // return L.marker(latlng, { icon: {}}); // Change the icon to a custom icon
}

Answer 2

我认为，如果您只是尝试显示自定义图标，那么最好尝试使用标记组件而不是Geojson组件。

<Map center={center} zoom={1}>
  <Marker
    icon={homeIcon}
    key='marker1'
    onClick={this._handleClick}
    position={leafletLatLng}
    />
</Map>
...
const homeIconUrl = 'home-2.png'
const homeIcon = icon({
  iconUrl: homeIconUrl,
  iconSize: [32, 37],
  iconAnchor: [16, 37]
})