ReactJS谷歌地图组件赢得';重排机
我正在编写一个web应用程序,它允许您输入一个地址,并呈现一张地图,上面有从给定地址到其他4个地址(目前为硬编码)的方向。一切正常,直到我想输入新地址并刷新地图 我正在使用tomchentw/react谷歌地图库获取方向并渲染地图 这是我的密码:ReactJS谷歌地图组件赢得';重排机,reactjs,google-maps,Reactjs,Google Maps,我正在编写一个web应用程序,它允许您输入一个地址,并呈现一张地图,上面有从给定地址到其他4个地址(目前为硬编码)的方向。一切正常,直到我想输入新地址并刷新地图 我正在使用tomchentw/react谷歌地图库获取方向并渲染地图 这是我的密码: import React from 'react'; import ReactDOM from 'react-dom'; import './index.css'; import App from './App'; import registerSer
import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import registerServiceWorker from './registerServiceWorker';
import { compose, withProps, withPropsOnChange, withState, lifecycle } from "recompose";
import {
withScriptjs,
withGoogleMap,
GoogleMap,
Marker,
DirectionsRenderer,
} from "react-google-maps";
const MapWithADirectionsRenderer = compose(
withProps({
googleMapURL: "https://maps.googleapis.com/maps/api/js?key=AIzaSyC4R6AN7SmujjPUIGKdyao2Kqitzr1kiRg&v=3.exp&libraries=geometry,drawing,places",
loadingElement: <div style={{ height: `100%` }} />,
containerElement: <div style={{ height: `500px` }} />,
mapElement: <div style={{ height: `100%` }} />,
}),
withScriptjs,
withGoogleMap,
lifecycle({
componentDidMount() {
this.setState({
newDirections: [],
});
let destinations = ['Imperial College', '123 Aldersgate Street', '17 Moorgate', 'Spitafields Market']
const DirectionsService = new google.maps.DirectionsService();
DirectionsService.route({
origin: this.props.origin,
destination: destinations[0],
travelMode: google.maps.TravelMode.TRANSIT,
}, (result, status) => {
if (status === google.maps.DirectionsStatus.OK) {
this.setState({
directions: result,
newDirections: this.state.newDirections.concat([result])
});
} else {
console.error(`error fetching directions ${result}`);
}
});
DirectionsService.route({
origin: this.props.origin,
destination: destinations[1],
travelMode: google.maps.TravelMode.TRANSIT,
}, (result, status) => {
if (status === google.maps.DirectionsStatus.OK) {
this.setState({
directions1: result,
newDirections: this.state.newDirections.concat([result])
});
} else {
console.error(`error fetching directions ${result}`);
}
});
DirectionsService.route({
origin: this.props.origin,
destination: destinations[2],
travelMode: google.maps.TravelMode.TRANSIT,
}, (result, status) => {
if (status === google.maps.DirectionsStatus.OK) {
this.setState({
directions2: result,
newDirections: this.state.newDirections.concat([result])
});
} else {
console.error(`error fetching directions ${result}`);
}
});
DirectionsService.route({
origin: this.props.origin,
destination: destinations[3],
travelMode: google.maps.TravelMode.TRANSIT,
}, (result, status) => {
if (status === google.maps.DirectionsStatus.OK) {
this.setState({
directions3: result,
newDirections: this.state.newDirections.concat([result])
});
} else {
console.error(`error fetching directions ${result}`);
}
});
}
})
)(props =>
<GoogleMap
defaultZoom={7}
defaultCenter={new google.maps.LatLng(51.435341, -0.131116)}
>
{props.directions && <DirectionsRenderer directions={props.newDirections[0]} />}
{props.directions1 && <DirectionsRenderer directions={props.newDirections[1]} />}
{props.directions2 && <DirectionsRenderer directions={props.newDirections[2]} />}
{props.directions3 && <DirectionsRenderer directions={props.newDirections[3]} />}
</GoogleMap>
);
class AddressForm extends React.Component {
constructor(props) {
super(props);
this.state = { value: '' };
this.handleChange = this.handleChange.bind(this);
this.handleSubmit = this.handleSubmit.bind(this);
}
handleChange(event) {
this.setState({ value: event.target.value });
}
handleSubmit(event) {
let targetAddress = this.state.value;
ReactDOM.render(<MapWithADirectionsRenderer origin={targetAddress} destination='Imperial College' />, document.getElementById('mapplace'));
event.preventDefault();
}
render() {
return (
<form onSubmit={this.handleSubmit}>
<label>
Address:
<input type="text" value={this.state.value} onChange={this.handleChange} />
</label>
<input type="submit" value="submit" />
</form>
);
}
}
registerServiceWorker();
ReactDOM.render(<AddressForm />, document.getElementById('formplace'));
从“React”导入React;
从“react dom”导入react dom;
导入“./index.css”;
从“./App”导入应用程序;
从“./registerServiceWorker”导入registerServiceWorker;
从“重新组合”导入{compose,withProps,withPropsOnChange,withState,lifecycle};
进口{
用ScriptJS,
用谷歌地图,
谷歌地图,
标记,
方向,
}从“谷歌地图反应”;
const MapWithADirectionsRenderer=compose(
用道具({
谷歌地图网址:https://maps.googleapis.com/maps/api/js?key=AIzaSyC4R6AN7SmujjPUIGKdyao2Kqitzr1kiRg&v=3.exp&libraries=geometry,图纸,位置“,
加载元素:,
集装箱运输:,
mapElement:,
}),
用ScriptJS,
用谷歌地图,
生命周期({
componentDidMount(){
这是我的国家({
新方向:[],
});
let destinations=[“帝国理工学院”、“奥尔德斯盖特街123号”、“穆尔盖特17号”、“斯皮塔菲尔德市场”]
const DirectionsService=new google.maps.DirectionsService();
方向服务.路线({
来源:this.props.origin,
目的地:目的地[0],
travelMode:google.maps.travelMode.TRANSIT,
},(结果、状态)=>{
if(status==google.maps.directionstatus.OK){
这是我的国家({
方向:结果,
newDirections:this.state.newDirections.concat([结果])
});
}否则{
错误(`error fetching directions${result}`);
}
});
方向服务.路线({
来源:this.props.origin,
目的地:目的地[1],
travelMode:google.maps.travelMode.TRANSIT,
},(结果、状态)=>{
if(status==google.maps.directionstatus.OK){
这是我的国家({
方向1:结果,
newDirections:this.state.newDirections.concat([结果])
});
}否则{
错误(`error fetching directions${result}`);
}
});
方向服务.路线({
来源:this.props.origin,
目的地:目的地[2],
travelMode:google.maps.travelMode.TRANSIT,
},(结果、状态)=>{
if(status==google.maps.directionstatus.OK){
这是我的国家({
方向2:结果,
newDirections:this.state.newDirections.concat([结果])
});
}否则{
错误(`error fetching directions${result}`);
}
});
方向服务.路线({
来源:this.props.origin,
目的地:目的地[3],
travelMode:google.maps.travelMode.TRANSIT,
},(结果、状态)=>{
if(status==google.maps.directionstatus.OK){
这是我的国家({
方向3:结果,
newDirections:this.state.newDirections.concat([结果])
});
}否则{
错误(`error fetching directions${result}`);
}
});
}
})
)(道具=>
{props.directions&&}
{props.directions1&}
{props.directions2&&}
{props.directions3&&}
);
类AddressForm扩展了React.Component{
建造师(道具){
超级(道具);
this.state={value:''};
this.handleChange=this.handleChange.bind(this);
this.handleSubmit=this.handleSubmit.bind(this);
}
手变(活动){
this.setState({value:event.target.value});
}
handleSubmit(事件){
让targetAddress=this.state.value;
ReactDOM.render(,document.getElementById('mapplace'));
event.preventDefault();
}
render(){
返回(
地址:
);
}
}
registerServiceWorker();
ReactDOM.render(,document.getElementById('formplace'));
加载时,用户只看到渲染的组件。输入地址并提交表单后,地图将正确显示。但是,当我输入新地址并重新提交表单时,映射不会重新提交
是否缺少某些内容?您可能正在查找在任何更新发生后运行的函数,
componentDidMount
在第一次渲染后只调用一次
我将提出以下修改清单:
a) 引入一个单独的函数来绘制管线:
drawRoutes() {
let destinations = ['Imperial College', '123 Aldersgate Street', '17 Moorgate', 'Spitafields Market']
const DirectionsService = new google.maps.DirectionsService();
DirectionsService.route({
origin: this.props.origin,
destination: destinations[0],
travelMode: google.maps.TravelMode.TRANSIT,
}, (result, status) => {
if (status === google.maps.DirectionsStatus.OK) {
this.setState({
directions: result,
newDirections: this.state.newDirections.concat([result])
});
} else {
console.error(`error fetching directions ${result}`);
}
});
DirectionsService.route({
origin: this.props.origin,
destination: destinations[1],
travelMode: google.maps.TravelMode.TRANSIT,
}, (result, status) => {
if (status === google.maps.DirectionsStatus.OK) {
this.setState({
directions1: result,
newDirections: this.state.newDirections.concat([result])
});
} else {
console.error(`error fetching directions ${result}`);
}
});
DirectionsService.route({
origin: this.props.origin,
destination: destinations[2],
travelMode: google.maps.TravelMode.TRANSIT,
}, (result, status) => {
if (status === google.maps.DirectionsStatus.OK) {
this.setState({
directions2: result,
newDirections: this.state.newDirections.concat([result])
});
} else {
console.error(`error fetching directions ${result}`);
}
});
DirectionsService.route({
origin: this.props.origin,
destination: destinations[3],
travelMode: google.maps.TravelMode.TRANSIT,
}, (result, status) => {
if (status === google.maps.DirectionsStatus.OK) {
this.setState({
directions3: result,
newDirections: this.state.newDirections.concat([result])
});
} else {
console.error(`error fetching directions ${result}`);
}
});
}
b) 设置初始状态:
componentWillMount() {
this.setState({
newDirections: [],
});
}
c) 绘制路线:
componentDidMount() {
this.drawRoutes();
}
d) 如果地址已更改,则重新绘制路由
componentDidUpdate(prevProps, prevState) {
if (prevProps.origin !== this.props.origin) {
this.setState({
directions: null,
directions1: null,
directions2: null,
directions3: null,
newDirections: []
});
this.drawRoutes();
}
}