我需要在点击功能时重新加载 Google map 。我有点击事件,它将从 API 获取数据,并且该数据应该重新加载到 Google map 中。
这是我的Dashboard.js
import React, { Component } from 'react';
import Map from './Gmap';
import MapHelpBar from '../common/MapHelpBar';
import StationList from './StationList';
import { getStations } from '../../api/StationApi';
import Constants from '../../utils/constants';
class Dashboard extends Component {
constructor(props) {
super(props);
this.state = {
stations: [],
markerClass: '',
};
}
componentDidMount() {
getStations().then(res => res).then(result => {
if (result) {
this.setState({ stations: result});
}
});
}
callStation = async (data, clickedIndex) => {
getStations().then(res => res).then(response => {
let stationArr = [];
for (let i = 0; i < response.length; i++) {
if (data === Constants.stationStatus.charging) {
const statusCharging = response[i].connectors.every((status) => {
if (data === status.status) {
return true;
}
});
if (statusCharging === true) {
stationArr.push(response[i]);
}
}
if (data === Constants.stationStatus.faulted) {
const statusFaulated = response[i].connectors.some((status) => {
if (data === status.status || Constants.stationStatus.damaged === status.status) {
return true;
}
});
if (statusFaulated === true) {
stationArr.push(response[i]);
}
}
if (data === Constants.stationStatus.ok) {
const statusOk = response[i].connectors.some((status) => {
if (data === status.status
|| Constants.stationStatus.available === status.status
|| Constants.stationStatus.preparing === status.status) {
return true;
}
});
if (statusOk === true) {
stationArr.push(response[i]);
}
}
}
this.setState({ stations: stationArr});
if (this.state.markerClass === clickedIndex) {
this.setState({markerClass: 0});
// setStations(response);
} else {
this.setState({markerClass: clickedIndex});
// setStations(stationArr);
}
});
}
render () {
return(
<div>
<div className="row">
<div className="col-md-12 col-lg-12">
<section className="panel">
<div className="panel-body">
<div className="row">
<div className="col-lg-12">
{
this.state.stations.length > 0 ? <Map stations={this.state.stations} /> : null
}
</div>
<MapHelpBar clicked={this.callStation} clickedClassIndex={this.state.markerClass} />
</div>
</div>
</section>
</div>
</div>
{
<StationList stations={this.state.stations} />
}
</div>
)
}
}
export default Dashboard
在 Dashboard.js 中,StationList (StationList.js) 在点击时重新加载
<StationList stations={this.state.stations} />
但是 map (Gmap.js)没有重新加载
<div className="col-lg-12">
{
this.state.stations.length > 0 ? <Map stations={this.state.stations} /> : null
}
</div>
这是我的Gmap.js
import React, { Component } from "react";
import * as Config from "../../config/Config";
import StationGoogleMap from "../stations/StationGoogleMap";
class Gmap extends Component {
constructor(props) {
super(props);
this.state = {
stations: [],
selectedMarker: false,
infoWindow: true,
};
}
componentDidMount() {
this.setState({ stations: this.props.stations });
}
handleClick = (marker, infoWindow) => {
this.setState({ selectedMarker: marker });
this.setState({ infoWindow: infoWindow });
};
render() {
const googleMapURL = `https://maps.googleapis.com/maps/api/js?v=3.exp&key=${process.env.REACT_APP_MAP_KEY}&libraries=geometry,drawing,places`;
let mapBlock = null;
let markers = this.state.stations;
let latitude = Config.MAP_CONFIG.default_location.latitude;
let longitude = Config.MAP_CONFIG.default_location.longitude;
let defaultZoom = 8;
let isStationDetailPage = false;
if (this.props.id) {
isStationDetailPage = true;
}
if (markers.length === 1) {
latitude =
markers[0].station_latitude !== null
? markers[0].station_latitude
: latitude;
longitude =
markers[0].station_longitude !== null
? markers[0].station_longitude
: longitude;
defaultZoom = 12;
}
if (this.state.stations.length > 0) {
mapBlock = (
<StationGoogleMap
selectedMarker={this.state.selectedMarker}
markers={markers}
onClick={this.handleClick}
googleMapURL={googleMapURL}
loadingElement={<div style={{ height: `100%` }} />}
containerElement={<div style={{ height: `400px` }} />}
mapElement={<div style={{ height: `100%` }} />}
// latitude={-34.617874}
// longitude={-58.368587}
latitude={latitude}
longitude={longitude}
defaultZoom={defaultZoom}
infoWindow={this.state.infoWindow}
isStationDetailPage={isStationDetailPage}
/>
);
}
return mapBlock;
}
}
Gmap.defaultProps = {
id: '',
stations:[]
}
export default Gmap;
这是我的 MapHelpBar.js
import React from 'react';
import Constants from '../../utils/constants';
import Translations from '../../../translations.json';
function MapHelpBar(props) {
return (
<>
<div className="col-lg-12">
<div className="stations-map">
<div className="flex-container">
<div className="stations-details">
{Translations.map.help.stations.display_label}
:
</div>
<div className={props.clickedClassIndex === 1 ? 'stations-details active' : 'stations-details'} onClick={() => props.clicked(Translations.map.help.stations.status_list.charging, 1)}>
<img src={`/img/${Constants.stationIcons.green}`} alt={Translations.station_detail.station_icons.green_icon} />
{Translations.map.help.stations.status_list.charging}
</div>
<div className={props.clickedClassIndex === 2 ? 'stations-details active' : 'stations-details'} onClick={() => props.clicked(Translations.map.help.stations.status_list.faulted, 2)}>
<img src={`/img/${Constants.stationIcons.red}`} alt={Translations.station_detail.station_icons.red_icon} />
{Translations.map.help.stations.status_list.faulted}
</div>
<div className={props.clickedClassIndex === 3 ? 'stations-details active' : 'stations-details'} onClick={() => props.clicked(Translations.map.help.stations.status_list.ok, 3)}>
<img src={`/img/${Constants.stationIcons.blue}`} alt={Translations.station_detail.station_icons.blue_icon} />
{Translations.map.help.stations.status_list.ok}
</div>
</div>
</div>
</div>
<div className="col-lg-12">
<div className="stations-map">
<div className="flex-container">
<div className="stations-details">
{Translations.map.help.connectors.display_label}
:
</div>
<div className="stations-details">
<span className="box-available" />
{Translations.map.help.connectors.status_list.available}
</div>
<div className="stations-details">
<span className="box-faulted" />
{Translations.map.help.connectors.status_list.faulted}
</div>
</div>
</div>
</div>
</>
);
}
export default MapHelpBar;
谁能帮我解决这个问题?
最佳答案
您缺少 shouldComponentUpdate()
关于javascript - React - 如何强制重新加载类组件?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/62338221/