为什么我没有得到实际的纬度和经度？纬度：'LOCATION'.latitude 的实例和经度：'LOCATION'.longitude 的实例

Question

为什么我在尝试获取实际纬度和经度时得到了纬度实例和经度实例？这里我使用的是flutter的geolocator包。请有人帮助我，我们将不胜感激。

location.dart

import 'package:geolocator/geolocator.dart';

class LOCATION {
  double latitued = 0.0;
  double longitude = 0.0;
  Future<void> getCurrentLocation() async {
    try {
      Position currentPosition;
      currentPosition = await Geolocator.getCurrentPosition(
          desiredAccuracy: LocationAccuracy.low);
      latitued = currentPosition.latitude;
      longitude = currentPosition.longitude;
    } catch (e) {
      print(e);
    }
  }
}

loading_screen.dart

import 'package:flutter/material.dart';
import 'package:clima_v1/services/location.dart';
import 'package:http/http.dart';

class LoadingScreen extends StatefulWidget {
  @override
  _LoadingScreenState createState() => _LoadingScreenState();
}

class _LoadingScreenState extends State<LoadingScreen> {
  void getLocation_v1() async {
    LOCATION location = LOCATION();
    await location.getCurrentLocation();
    print('Latitude: $location.latitude and Longitude: $location.longitude');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: ElevatedButton(
          onPressed: () {
            //Get the current location
            getLocation_v1();
          },
          child: Text('Get Location'),
        ),
      ),
    );
  }
}

输出：

I/flutter ( 9688): Latitude: Instance of 'LOCATION'.latitude and Longitude: Instance of 'LOCATION'.longitude

Answer 1

你应该使用花括号：

print('Latitude: ${location.latitude} and Longitude: ${location.longitude}');

否则，您只是打印 location，而不是 location.latitude。

为什么我没有得到实际的纬度和经度？纬度：'LOCATION'.latitude 的实例和经度：'LOCATION'.longitude 的实例

Why i am not getting the actual latitude and longitude? Latitude: Instance of 'LOCATION'.latitude and Longitude: Instance of 'LOCATION'.longitude

location

dart

flutter