如何解决：Undefined Promise Rejection (id:0) type error with user location map？

Question

My position is in Vietnam but the device doesn't display the permission asking when I navigate to this screen

Here's the error 我尝试使用 react-native-maps 和导入权限，来自 expo-permissions + expo-location 的位置我是否必须捕获错误以及如何捕获错误？我也在用我的真实设备

这是代码

import React from 'react';
import {
    View,
    Text,
    StyleSheet,
    PermissionsAndroid,
} from 'react-native'
import MapView  from 'react-native-maps';
import {Permissions} from 'expo-permissions';
import {Location} from 'expo-location'

class MapViewScreen extends React.Component {
    constructor(props){
        super(props);

        this.state={
            region:{
                latitude: 37.78825,
                longitude: -122.4324,
                latitudeDelta: 0.922,
                longitudeDelta: 0.0421,
            }
        }
        this._requestUserLocationPermission();
    }
    _requestUserLocationPermission = async () => {
        const { status } = await Permissions.askAsync(Permissions.LOCATION);
        if(status !== 'granted'){
            alert('Please enable your location!')
        }

        let location = await Location.getCurrentPositionAsunc({enabledHighAccuracy: true})
        let region = {
            latitude: location.coords.latitude,
            longitude: location.coords.longitude,
            latitudeDelta: 0.045,
            longitudeDelta: 0.045
        }

    }
    render(){
        return(
            <View style={styles.container}>
                <MapView
                    initialRegion={this.state.region}
                    showsCompass={true}
                    showsUserLocation={true}
                    rotateEnabled={false}
                    style={{flex: 1}}
                />
            </View>
        );
    }
}

export default MapViewScreen;

const styles = StyleSheet.create({
    container:{
        flex: 1,
        backgroundColor: '#fff',
    }
})

Answer 1

我已经成功解决了这个问题。通过将 react-native-maps 中的 initialRegion 属性更改为 region ，屏幕现在能够在我进入地图屏幕后立即显示我的设备位置。感谢大家的帮助

如何解决：Undefined Promise Rejection (id:0) type error with user location map？

How to solve: Undefined Promise Rejection (id:0) type error with user location map?

react-native

react-native-maps

expo