1

私は反応リーフレットを使用していますが、これまでのところマップは正常に表示されています。<GeoJson>ポリゴンのオーバーレイにも成功しました。

現在、中心とズームの値をハードコーディングしていますが、GeoJSON ポリゴン全体が表示されるようにデフォルトのズームを設定したいと考えています。ウェブで見つけたドキュメント/回答に苦労しています(私は初心者/中級のJSです)。

ここに私のコンポーネントがあります:

import React from 'react';
import { StyleSheet, css } from 'aphrodite/no-important';
import L from 'leaflet';
import { Map, TileLayer, Marker, Popup, GeoJson } from 'react-leaflet';
import axios from 'axios';

const styles = StyleSheet.create({
  map: {
    height: 240,
    width: '100%'
  }
});

const geodatas = { "type": "Polygon", "coordinates": [ [ [ 0.901409326032148, 51.87846074983652 ], [ 0.900728205963941, 51.87844428860128 ], [ 0.899345524616457, 51.8784325381963 ], [ 0.898758899468915, 51.878417331772674 ], [ 0.898382518544509, 51.87839424237513 ], [ 0.897325195329164, 51.878223304667991 ], [ 0.89594922021314, 51.877976588301692 ], [ 0.894955640203439, 51.877846407999037 ], [ 0.894280316390969, 51.877785709788448 ], [ 0.893320356777677, 51.877703150758911 ], [ 0.892628493048771, 51.877632959777358 ], [ 0.892139172447305, 51.877548791413972 ], [ 0.891852225577892, 51.877468544876464 ], [ 0.891748332612011, 51.877548514557468 ], [ 0.891456640213901, 51.877849701135801 ], [ 0.891291905863462, 51.878157745192553 ], [ 0.891212527716225, 51.878460992695949 ], [ 0.891079390830871, 51.879306113637384 ], [ 0.891068489722895, 51.879386403461886 ], [ 0.890532814748409, 51.879394179295069 ], [ 0.890012032842571, 51.879477202674821 ], [ 0.889375209183071, 51.879561187317655 ], [ 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class MapHolder extends React.Component {
  constructor() {
    super();
    this.state = {
      geodatas: geodatas,
      lat: 51.881403,
      lng: 0.918583,
      zoom: 17,
    };
  }


  render() {
const accessToken = 'pk.eyJ1IjoiZ2F6YXN0b24iLCJhIjoiY2loa21hNzRoMG50eHQ0bHp2azNpeHhwaiJ9.h81FekBCVUufbqxc9ywySQ'
const position = [this.state.lat, this.state.lng];

console.log(this.refs.geojson);
console.log(this.refs.foo.leafletElement);

this.refs.foo.leafletElement.fitBounds(this.refs.geojson.getBounds());

return (
  <div>
    <Map ref="foo" style={{height: "260px"}} center={position} zoom={this.state.zoom} scrollWheelZoom={false} >
    <TileLayer
      attribution='&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
      url={`https://api.mapbox.com/styles/v1/gazaston/cihkojpjh00whrom498ghjoc5/tiles/256/{z}/{x}/{y}?access_token=${accessToken}`}
      id='gazaston.o9phia6g'
      detectRetina={true}
    />
    <GeoJson ref="geojson" data={this.state.geodatas} />
  </Map>
  </div>
);

}

export default MapHolder; 

アップデート:

React 開発ツールを使用するときは、<MapHolder>コンポーネントを選択し、コンソールに切り替えて実行します

$r.refs.foo.leafletElement.fitBounds($r.refs.geojson.leafletElement.getBounds());

すべてが期待どおりに機能します。ただし、私のコードでは

this.refs.foo.leafletElement.fitBounds(this.refs.geojson.leafletElement.getBounds());

戻り値Uncaught TypeError: Cannot read property 'leafletElement' of undefined

私はとても近いです!私は何が欠けていますか?

4

3 に答える 3

0

@IvanSanchezの返信とreact-leafletの仕組みに基づいて、最初に参照をGeoJsonレイヤーに追加することをお勧めします

 <GeoJson  ref="geojson" data={this.state.geodatas} />

次に、その参照でマップにアクセスします

this.refs.foo.leafletElement.fitBounds(this.refs.geojson.leafletElement.getBounds())
于 2016-11-07T13:59:20.203 に答える