我正在创建一个使用react-google-maps的网络,我收到了一堆未定义的错误。我是新的反应/ js世界所以任何帮助将非常感激。这是确切的错误:
Failed to compile.
./src/App.js
Line 23: 'lifecycle' is not defined no-undef
Line 25: 'google' is not defined no-undef
Line 28: 'google' is not defined no-undef
Line 29: 'google' is not defined no-undef
Line 30: 'google' is not defined no-undef
Line 32: 'google' is not defined no-undef
以下是代码:
import React, { Component } from 'react';
import './App.css';
import { compose, withProps } from "recompose"
import { withScriptjs, withGoogleMap, GoogleMap, Marker } from "react-google-maps"
const MapWithDirections = compose(
withProps({
googleMapURL: "https://maps.googleapis.com/maps/api/js?v=3.exp&libraries=geometry,drawing,places",
loadingElement: <div style={{ height: `100%` }} />,
containerElement: <div style={{ height: `800px`, width: '800px'}} />,
mapElement: <div style={{ height: `100%` }} />,
}),
withScriptjs,
withGoogleMap,
lifecycle({
componentDidMount() {
const DirectionsService = new google.maps.DirectionsService();
DirectionsService.route({
origin: new google.maps.LatLng(45.29233869999999, -70.06117489999997),
destination: new google.maps.LatLng(45.3570637, -70.06257679999999),
travelMode: google.maps.TravelMode.DRIVING,
}, (result, status) => {
if (status === google.maps.DirectionsStatus.OK) {
this.setState({
directions: result,
});
} else {
console.error(`error fetching directions ${result}`);
}
});
}
})
)((props) =>
<GoogleMap
defaultZoom={8}
defaultCenter={{ lat: -34.397, lng: 150.644 }}
>
{props.isMarkerShown && <Marker position={{ lat: -34.397, lng: 150.644 }} />}
</GoogleMap>
)
class App extends Component {
render() {
return (
<div className="App">
<MapWithDirections/>
</div>
);
}
}
export default App;
看起来我没有正确导入谷歌地图,但看着这个例子,它不应该这样做。有什么想法吗?
答案 0 :(得分:2)
您错过了生命周期和谷歌的导入。在示例中,您可以看到,
const {compose,withProps, lifecycle } = require(“重组”);
并且示例中未提及谷歌的导入,但也应导入。
关于导入google,它与eslint验证有关,而不是JS。进行以下更改:
PlacesAutocomplete.js第1行:
/*global google*/
^这将声明eslint谷歌是一个全球名称,并将在运行时可用。有关详细信息,您可以通过此git page
答案 1 :(得分:2)
您可以尝试此 new window.google.maps
对我有用!
示例:
<Marker
icon={{
url:"../../assets/img/carz.png",
anchor: new window.google.maps.Point(10, 10),
scaledSize: new window.google.maps.Size(20, 20)
}}
/>
答案 2 :(得分:0)
当我尝试在Google Map组件中绘制一个圆时,我必须面对这个问题,所以我为地图组件创建了一个对象,并使用try-catch在componentDidUpdate中处理了该问题,因为在组件渲染时会花费很多时间。谢谢
componentDidUpdate() {
const { map, cir1, cir2, vertical } = this._generateProps()
const { center } = vertical ? this._generateProps() : this.state
circle1 ? circle1.setMap(null) : null
circle2 ? circle2.setMap(null) : null
if (cir1) {
try {
circle1 = new google.maps.Circle({
strokeColor: "#FF0000",
strokeOpacity: 0.8,
strokeWeight: 0,
fillColor: "#f5a623",
fillOpacity: 0.35,
map,
center,
radius: 450
})
}
catch (e) {
console.log(e)
}
}
if (cir2) {
try {
circle2 = new google.maps.Circle({
strokeColor: "#f4ff10",
strokeOpacity: 0.16,
strokeWeight: 0,
fillColor: "#4a90e2",
fillOpacity: 0.3,
map,
center,
radius: 800
})
}
catch (e) {
console.log(e)
}
}
}
答案 3 :(得分:0)
我不知道为什么,但是使用Angular和React,您需要为这种库添加脚本标签,如下所示:
<body>
...
<script src="https://maps.googleapis.com/maps/api/js?key=<API KEY>&callback=init"
async defer></script>
</body>
如果您查看内部,则可以找到window.google的定义:
window.google = window.google || {};
在这种情况下,您将需要使用window.google而不是this.props.google。 我将尝试找到一种更好的方法来使用该库,但这是我对这个未知问题的贡献...