Javascript 反应本机地图数据访问
我有一个关于react nativeJavascript 反应本机地图数据访问,javascript,reactjs,react-native,Javascript,Reactjs,React Native,我有一个关于react nativeMapViewDirection与世博会的问题 我从MapViewDirection中的onReady函数收到了结果 我想向用户显示距离和持续时间字段 onReady={result => { console.log(result) }}; 我想声明我正在学习并且正在使用其他人的代码进行练习。以下是完整代码: import React, { Component } from 'react'; import { Dime
MapViewDirection
与世博会的问题
我从MapViewDirection
中的onReady
函数收到了结果
我想向用户显示距离和持续时间字段
onReady={result => {
console.log(result)
}};
我想声明我正在学习并且正在使用其他人的代码进行练习。以下是完整代码:
import React, { Component } from 'react';
import { Dimensions, StyleSheet } from 'react-native';
import MapView from 'react-native-maps';
import MapViewDirections from 'react-native-maps-directions';
const { width, height } = Dimensions.get('window');
const ASPECT_RATIO = width / height;
const LATITUDE = 40.3788;
const LONGITUDE = -105.5143;
const LATITUDE_DELTA = 0.0192;
const LONGITUDE_DELTA = LATITUDE_DELTA * ASPECT_RATIO;
const GOOGLE_MAPS_APIKEY = 'AIzaSyAkwAlX2w0S3ba6OxBqr13JGDuYIi5GRZ8';
class Example extends Component {
constructor(props) {
super(props);
this.state = {
coordinates: [
{
latitude:40.3788,
longitude:-105.5143,
},
],
};
this.mapView = null;
}
onMapPress = (e) => {
this.setState({
coordinates: [
...this.state.coordinates,
e.nativeEvent.coordinate,
],
});
}
render() {
return (
<MapView
initialRegion={{
latitude: LATITUDE,
longitude: LONGITUDE,
latitudeDelta: LATITUDE_DELTA,
longitudeDelta: LONGITUDE_DELTA,
}}
style={StyleSheet.absoluteFill}
ref={c => this.mapView = c}
onPress={this.onMapPress}
>
{this.state.coordinates.map((coordinate, index) =>
<MapView.Marker key={`coordinate_${index}`} coordinate={coordinate} />
)}
{(this.state.coordinates.length >= 2) && (
<MapViewDirections
origin={this.state.coordinates[0]}
waypoints={ (this.state.coordinates.length > 2) ? this.state.coordinates.slice(1, -1): null}
destination={this.state.coordinates[this.state.coordinates.length-1]}
apikey={GOOGLE_MAPS_APIKEY}
strokeWidth={3}
strokeColor="hotpink"
optimizeWaypoints={true}
onStart={(params) => {
console.log(`Started routing between "${params.origin}" and "${params.destination}"`);
}}
onReady={result => {
console.log(result);
this.mapView.fitToCoordinates(result.coordinates, {
edgePadding: {
right: (width / 20),
bottom: (height / 20),
left: (width / 20),
top: (height / 20),
}
});
}}
onError={(errorMessage) => {
// console.log('GOT AN ERROR');
}}
/>
)}
</MapView>
);
}
}
export default Example;
import React,{Component}来自'React';
从“react native”导入{Dimensions,StyleSheet};
从“react native maps”导入MapView;
从“react native maps directions”导入MapViewDirections;
const{width,height}=Dimensions.get('window');
常量纵横比=宽度/高度;
常数纬度=40.3788;
常数经度=-105.5143;
常数纬度_δ=0.0192;
常数经度_δ=纬度_δ*纵横比;
const GOOGLE_MAPS_APIKEY='AIzaSyAkwAlX2w0S3ba6OxBqr13JGDuYIi5GRZ8';
类示例扩展组件{
建造师(道具){
超级(道具);
此.state={
坐标:[
{
纬度:40.3788,
经度:-105.5143,
},
],
};
this.mapView=null;
}
onappress=(e)=>{
这是我的国家({
坐标:[
…这个州坐标,
e、 nativeEvent.coordinate,
],
});
}
render(){
返回(
this.mapView=c}
onPress={this.onMapPress}
>
{this.state.coordinates.map((坐标,索引)=>
)}
{(this.state.coordinates.length>=2)&&(
2) ?this.state.coordinates.slice(1,-1):null}
destination={this.state.coordinates[this.state.coordinates.length-1]}
apikey={GOOGLE\u MAPS\u apikey}
冲程宽度={3}
strokeColor=“热粉色”
优化路径点={true}
onStart={(参数)=>{
log(`在“${params.origin}”和“${params.destination}”之间开始路由';
}}
onReady={result=>{
控制台日志(结果);
此.mapView.fitToCoordinates(结果.coordinates{
边缘添加:{
右:(宽度/20),
底部:(高度/20),
左:(宽度/20),
顶部:(高度/20),
}
});
}}
OneError={(errorMessage)=>{
//log('GOT-ERROR');
}}
/>
)}
);
}
}
导出默认示例;
使用下面给定的代码,您可以使用纬度和经度获得两个位置之间的距离。我们在这里使用谷歌距离矩阵api来获取距离
getDistanceOneToOne(lat1, lng1, lat2, lng2)
{
const Location1Str = lat1 + "," + lng1;
const Location2Str = lat2 + "," + lng2;
let GOOGLE_API_KEY = "API_KEY"
let ApiURL = "https://maps.googleapis.com/maps/api/distancematrix/json?"
let params = `origins=${Location1Str}&destinations=${Location2Str}&key=${GOOGLE_API_KEY}`; // you need to get a key
let finalApiURL = `${ApiURL}${encodeURI(params)}`;
this.getDistance(finalApiURL).then((getDistance) => {
console.log('Distance charges',getDistance);
if (getDistance.status == "OK")
{
let value = getDistance.rows[0].elements[0].distance.text; //Distance
let time = getDistance.rows[0].elements[0].duration.value; //time
}
});
}
getDistance = (url) => {
return this.getDistanceCall(url)
}
getDistanceCall = (url) => {
return fetch(url, {
method: 'GET',
})
.then((response) => { return response.json(); })
.catch((error) => {
return error;
});
}
亲爱的Aashish,请说出你的确切愿望是什么?我不明白你想要什么!因此,我希望能够获得从地图上所有选定的标记移动所需的距离和时间。您能在我上面的屏幕代码中进一步解释一下在哪里使用这个吗。请我无法集成。@AashishSapkota首先删除您问题中提到的api密钥。在stackoverflow上发布问题时,只需使用常量(API_键)。这样,除了您之外,没有人可以使用您的api密钥。@AashishSapkota首先获取两个位置的纬度和经度。然后用这两个纬度和经度调用上面提到的getDistanceOnetoOne函数。您将获得这两个位置之间的距离和时间估计。