TypeError: undefined is not an object (evaluating 'navigator.geolocation.requestAuthorization')

问题

I am attempting to call:

`navigator.geolocation.requestAuthorization();`

to request geolocation permission.

But, this is resulting in error when running in iOS simulator

This was working at one point, but stopped. I attempted to delete and create a new project. I also tried to uninstall/reinstall node and react-native-cli.

import React, {Fragment, Component} from 'react';
import {
  SafeAreaView,
  StyleSheet,
  ScrollView,
  View,
  Text,
  StatusBar,
} from 'react-native';

import {
  Header,
  LearnMoreLinks,
  Colors,
  DebugInstructions,
  ReloadInstructions,
} from 'react-native/Libraries/NewAppScreen';

export default class App extends Component {

    constructor(props)
    {
        super(props);

        navigator.geolocation.requestAuthorization();
    }

    render() {

        return (

                <View style={styles.MainContainer}>
                <SafeAreaView style={{flex: 1, backgroundColor: '#fff'}}>
                <Text style={styles.sectionTitle}>Hello World!</Text>
                </SafeAreaView>
                </View>

                );
    }
}

const styles = StyleSheet.create({
  MainContainer :{
     justifyContent: 'center',
     flex:1,
     margin: 5,
     marginTop: (Platform.OS === 'ios') ? 20 : 0,
  },
  sectionTitle: {
    fontSize: 24,
    fontWeight: '600',
    color: Colors.black,
  },
});

I am getting this error:

[error][tid:com.facebook.react.JavaScript] TypeError: undefined is not an object (evaluating 'navigator.geolocation.requestAuthorization')

This error is located at:
    in App (at renderApplication.js:40)
    in RCTView (at View.js:35)
    in View (at AppContainer.js:98)
    in RCTView (at View.js:35)
    in View (at AppContainer.js:115)
    in AppContainer (at renderApplication.js:39)

回答1:

geolocation has been extracted from react native .60 version. If you need an alternative solution

install react-native-community/geolocation

npm install @react-native-community/geolocation --save


react-native link @react-native-community/geolocation

then

IOS

You need to include the NSLocationWhenInUseUsageDescription key in Info.plist to enable geolocation when using the app. In order to enable geolocation in the background, you need to include the 'NSLocationAlwaysUsageDescription' key in Info.plist and add location as a background mode in the 'Capabilities' tab in Xcode.

Android

To request access to location, you need to add the following line to your app's AndroidManifest.xml

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

usage

import Geolocation from '@react-native-community/geolocation';

Geolocation.getCurrentPosition(info => console.log(info));

回答2:

Please ensure you have added libRCTGeolocation.a in Build Phases --> Link Binary With Libraries on your Xcode Project settings and RCTGeolocation.xcodeproj under Libraries of your Xcode project.

回答3:

From RN 0.6 or later, geolocation is not included in the RN core.If you want to use its API, you should do follow the steps in this link: https://github.com/react-native-community/react-native-geolocation

来源：https://stackoverflow.com/questions/56908771/typeerror-undefined-is-not-an-object-evaluating-navigator-geolocation-request

标签

react-native

geolocation