React native 使用React Native maps directions导航到页面时,React Native App将重新启动
我正在使用expo和react native。我有大约8个不同的屏幕,但在导航到一个应该显示地图的页面时,应用程序会重新启动并返回初始屏幕。 代码在emulator和my expo应用程序中运行良好。但是错误发生在二进制构建(APK)中。此页面包含来自“反应本机地图”和“反应本机地图方向”的数据 我试着用一个简单的hello world页面来替换这个页面,结果很好。只是这个特定的映射代码没有按预期工作。我正在使用: “expo”:“~37.0.3”,“react”:“~16.9.0”,“react native maps”:“0.26.1”,“react native maps directions”:“^1.8.0” 我不明白为什么会这样。我在下面附上了代码。谢谢React native 使用React Native maps directions导航到页面时,React Native App将重新启动,react-native,expo,react-native-navigation,react-native-maps,React Native,Expo,React Native Navigation,React Native Maps,我正在使用expo和react native。我有大约8个不同的屏幕,但在导航到一个应该显示地图的页面时,应用程序会重新启动并返回初始屏幕。 代码在emulator和my expo应用程序中运行良好。但是错误发生在二进制构建(APK)中。此页面包含来自“反应本机地图”和“反应本机地图方向”的数据 我试着用一个简单的hello world页面来替换这个页面,结果很好。只是这个特定的映射代码没有按预期工作。我正在使用: “expo”:“~37.0.3”,“react”:“~16.9.0”,“reac
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 = 37.771707;
const LONGITUDE = -122.4053769;
const LATITUDE_DELTA = 0.0922;
const LONGITUDE_DELTA = LATITUDE_DELTA * ASPECT_RATIO;
const GOOGLE_MAPS_APIKEY = 'MY_KEY';
class MapScreen extends Component {
constructor(props) {
super(props);
this.state = {
coordinates: [
{
latitude: 12.822960,
longitude: 80.041929,
},
{
latitude: 13.009027,
longitude: 80.222075,
},
],
};
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_${index}`} coordinate={coordinate} />
)}
{(this.state.coordinates.length >= 2) && (
<MapViewDirections
origin={this.state.coordinates[0]}
destination={this.state.coordinates[this.state.coordinates.length-1]}
apikey={GOOGLE_MAPS_APIKEY}
strokeWidth={3}
strokeColor="hotpink"
optimizeWaypoints={true}
onStart={(params) => {
console.log(`Started routing between "${params.origin}" and "${params.destination}"`);
}}
onReady={result => {
console.log(`Distance: ${result.distance} km`)
console.log(`Duration: ${result.duration} min.`)
this.mapView.fitToCoordinates(result.coordinates, {
edgePadding: {
right: (width / 20),
bottom: (height / 20),
left: (width / 20),
top: (height / 20),
}
});
}}
onError={(errorMessage) => {
// console.log('GOT AN ERROR');
}}
/>
)}
</MapView>
);
}
}
export default MapScreen;
import React,{Component}来自'React';
从“react native”导入{Dimensions,StyleSheet};
从“react native maps”导入MapView;
从“react native maps directions”导入MapViewDirections;
const{width,height}=Dimensions.get('window');
常量纵横比=宽度/高度;
常数纬度=37.771707;
常数经度=-122.4053769;
常数纬度δ=0.0922;
常数经度_δ=纬度_δ*纵横比;
const GOOGLE_MAPS_APIKEY='MY_KEY';
类MapScreen扩展组件{
建造师(道具){
超级(道具);
此.state={
坐标:[
{
纬度:12.822960,
经度:80.041929,
},
{
纬度:13.009027,
经度:80.222075,
},
],
};
this.mapView=null;
}
onappress=(e)=>{
这是我的国家({
坐标:[
…这个州坐标,
e、 nativeEvent.coordinate,
],
});
}
render(){
返回(
this.mapView=c}
onPress={this.onMapPress}
>
{this.state.coordinates.map((坐标,索引)=>
)}
{(this.state.coordinates.length>=2)&&(
{
log(`在“${params.origin}”和“${params.destination}”之间开始路由';
}}
onReady={result=>{
log(`Distance:${result.Distance}km`)
console.log(`Duration:${result.Duration}min.`)
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');
}}
/>
)}
);
}
}
导出默认地图屏幕;