如何在 ReactJs 项目中使用 Esri Arcgis Map? [英] How can I use Esri Arcgis Map in ReactJs Project?

问题描述

我正在尝试使用 Esri 地图.要将地图包含在我的项目中，我发现了以下内容:

要求(["esri/地图","esri/dijit/搜索","esri/dijit/LocateButton","esri/几何/点","esri/symbols/SimpleFillSymbol","esri/symbols/SimpleMarkerSymbol","esri/symbols/SimpleLineSymbol",

但是没有任何 esri 文件夹或 npm 包.因此，我在这里感到困惑.项目中esri是怎么导入的?

解决方案

使用 esri-loader 加载所需的 esri 模块.这是一个组件渲染底图.

import React, { Component } from 'react';从'esri-loader'导入{loadModules}；常量选项 = {网址:'https://js.arcgis.com/4.6/'};常量样式 = {容器: {高度:'100vh'，宽度:'100vw'},地图分区:{填充:0，保证金:0，高度:'100%',宽度:'100%'},}类 BaseMap 扩展组件 {构造函数(道具){超级(道具)；this.state = {状态:'加载'}}componentDidMount() {loadModules(['esri/Map', 'esri/views/MapView'], 选项).then(([Map, MapView]) => {const map = new Map({ 底图:街道"});const 视图 = 新地图视图({容器:viewDiv"，地图，变焦:15，中心:[78.4867, 17.3850]});view.then(() => {this.setState({地图，看法，状态:'加载'});});})}渲染图(){if(this.state.status === '加载') {返回<div>加载</div>;}}使成为() {返回(<div style={styles.container}><div id='viewDiv' style={styles.mapDiv } >{this.renderMap()}

)}}导出默认 BaseMap；

这会呈现底图，但没有响应.如果我删除视图 div 周围的 div，或者如果我将外部 div(围绕 viewDiv)的高度和宽度设为相对({ height: '100%', width: '100%'})，则地图不会呈现.不知道为什么.任何使其响应的建议将不胜感激.

I'm trying to use Esri map. To include map in my project, here is what I found:

require([
    "esri/map",
    "esri/dijit/Search",
    "esri/dijit/LocateButton",
    "esri/geometry/Point",
    "esri/symbols/SimpleFillSymbol",
    "esri/symbols/SimpleMarkerSymbol",
    "esri/symbols/SimpleLineSymbol",

But there isn't any esri folder or npm package. Therefore, I'm confused here. How esri is imported in project?

解决方案

Use esri-loader to load the required esri modules. This is a component rendering basemap.

import React, { Component } from 'react';
import { loadModules } from 'esri-loader';

const options = {
  url: 'https://js.arcgis.com/4.6/'
};

const styles =  {
  container: {
    height: '100vh',
    width: '100vw'
  },
  mapDiv: {
    padding: 0,
    margin: 0,
    height: '100%',
    width: '100%'
  },
}

class BaseMap extends Component {

  constructor(props) {
    super(props);
    this.state = {
      status: 'loading'
    }
  }

  componentDidMount() {
    loadModules(['esri/Map', 'esri/views/MapView'], options)
      .then(([Map, MapView]) => {
        const map = new Map({ basemap: "streets" });
        const view = new MapView({
          container: "viewDiv",
          map,
          zoom: 15,
          center: [78.4867, 17.3850]
        });
        view.then(() => {
          this.setState({
            map,
            view,
            status: 'loaded'
          });
        });
      })

  }

  renderMap() {
    if(this.state.status === 'loading') {
      return <div>loading</div>;
    }
  }

  render() {

    return(
          <div style={styles.container}>
            <div id='viewDiv' style={ styles.mapDiv } >
              {this.renderMap()}
            </div>
          </div>
    )
  }
}

export default BaseMap;

This renders a base map but this is not responsive. If I remove the div around the view div or if I give the height and width of the outer div (surrounding viewDiv) as relative ({ height: '100%', width: '100%'}), the map does not render. No idea why. Any suggestions to make it responsive would be appreciated.

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