4

我目前正在尝试学习反应,我想使用传单地图(react-leaflet)。

我有两个(点,多边形)GeoJson 对象要显示,它们正在工作,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} />;
}

使成为

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)}它停止工作并出现以下错误:

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)

我不知道为什么会发生错误,也许有人知道如何解决这个问题或帮助我理解我犯的错误。

编辑:return <CirleMarker />通过return L.circleMarker()在函数中替换pointToLayer,我让它工作了。

4

2 回答 2

6

return <CirleMarker />通过return L.circleMarker()在函数中替换pointToLayer,我让它工作了。

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
}
于 2017-02-27T08:33:25.727 回答
0

如果您只是尝试显示自定义图标,我认为您最好尝试使用 Marker 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]
})
于 2017-02-24T19:30:51.553 回答