Google Maps React/Redux组件

Question

我的React/Redux组件用于处理Google地图:

import React, { Component, PropTypes } from 'react'
import { connect } from 'react-redux'

import { changeMapCenter } from '../actions'

class Map extends Component {

  componentDidMount() {
    let script = document.createElement('script')

    script.setAttribute('type', 'text/javascript')
    script.setAttribute('src', 'https://maps.googleapis.com/maps/api/js?key=AIzaSyCXg-YGJF&callback=initMap')
    document.getElementsByTagName('head')[0].appendChild(script)

    window.initMap = () => {
      this.map = new google.maps.Map(document.getElementById('map'), {
        center: this.props.defaultCenter,
        zoom: this.props.defaultZoom
      });

      this.map.addListener('center_changed', (event) => {
        let center = {
          lat: this.map.getCenter().lat(),
          lng: this.map.getCenter().lng()
        }
        this.props.onMapCenterChanging(center)
      });
    }
  }

  render() {
    return (
      <div id='map'></div>
    );  
  }
}

const mapStateToProps = (state) => {
  return {
    mapPoints: state.mapPoints
  }
}

const mapDispatchToProps = (dispatch) => {
  return {
    onMapCenterChanging: (center) => {
      dispatch(changeMapCenter(center))
    }    
  }
}

export default connect(mapStateToProps, mapDispatchToProps)(Map)

正如您现在所看到的,此组件只是初始化地图并侦听地图中心的变化.现在我需要渲染一些标记(mapPoints).从Google API文档我可以做到(例如):

  var marker = new google.maps.Marker({
    position: myLatlng,
    map: map,
    title: 'Click to zoom'
  });

但是我怎么能用'React-style'呢？因为绘图标记不是"渲染"HTML,所以它只是调用JS Google Maps API函数.我可以将这个逻辑放在'initMap'函数中,但我的'mapPoints'可以改变.我应该在'render'函数中放置JS逻辑(删除已删除的点/绘制新点)吗？谢谢!

Answer 1

通常,包含一些命令性API(如jQuery小部件或类似的)的React组件通过不渲染任何东西(或只渲染最小的内容,如容器div)来实现,然后在React期间更新包装的小部件生命周期方法.实际上有一些组件已经包含了Google Maps API,特别是https://www.fullstackreact.com/articles/how-to-write-a-google-maps-react-component/引导您完成怎么做