javascript - React Native 无法调用 BackgroundGeolocation.start

Question

我收到此错误：

Could not invoke BackgroundGeolocation.start

我无法添加更多详细信息，因为我没有收到任何其他警告或错误。我不知道为什么会导致这个错误。底部的这段代码来自示例，但被翻译为基于函数而不是类。

这是我使用的库： https ://github.com/mauron85/react-native-background-geolocation

  useEffect(() => {
    if (!true) {
      return;
    }
    BackgroundGeolocation.configure({
      desiredAccuracy: BackgroundGeolocation.HIGH_ACCURACY,
      stationaryRadius: 50,
      distanceFilter: 50,
      notificationTitle: 'Background tracking',
      notificationText: 'enabled',
      //debug: true,
      startOnBoot: false,
      stopOnTerminate: true,
      locationProvider: BackgroundGeolocation.DISTANCE_FILTER_PROVIDER,
      interval: 10000,
      fastestInterval: 5000,
      activitiesInterval: 10000,
      stopOnStillActivity: false,
      url: 'http://192.168.81.15:3000/location',
      httpHeaders: {
        'X-FOO': 'bar',
      },
      // customize post properties
      postTemplate: {
        lat: '@latitude',
        lon: '@longitude',
        foo: 'bar', // you can also add your own properties
      },
    });

    BackgroundGeolocation.on('location', (location) => {
      console.log('loc', location);
      setLocation((prev) => ({
        ...prev,
        latitude: location.latitude,
        longitude: location.longitude,
      }));

      setHistory((prev) => {
        setDistance((prevDistance) => {
          if (prev.length === 0) {
            return 0;
          }
          const latestItem = prev[prev.length - 1];
          return (
            prevDistance
          );
        });

        return prev.concat({
          latitude: location.latitude,
          longitude: location.longitude,
        });
      });
      // handle your locations here
      // to perform long running operation on iOS
      // you need to create background task
      BackgroundGeolocation.startTask((taskKey) => {
        // execute long running task
        // eg. ajax post location
        // IMPORTANT: task has to be ended by endTask
        BackgroundGeolocation.endTask(taskKey);
      });
    });

    BackgroundGeolocation.on('stationary', (stationaryLocation) => {
      // handle stationary locations here
    });

    BackgroundGeolocation.on('error', (error) => {
      //console.log('[ERROR] BackgroundGeolocation error:', error);
    });

    BackgroundGeolocation.on('start', () => {
      //console.log('[INFO] BackgroundGeolocation service has been started');
    });

    BackgroundGeolocation.on('stop', () => {
      //console.log('[INFO] BackgroundGeolocation service has been stopped');
    });

    BackgroundGeolocation.on('authorization', (status) => {
      console.log(
        '[INFO] BackgroundGeolocation authorization status: ' + status,
      );
      if (status !== BackgroundGeolocation.AUTHORIZED) {
        // we need to set delay or otherwise alert may not be shown
        setTimeout(
          () =>
            Alert.alert(
              'App requires location tracking permission',
              'Would you like to open app settings?',
              [
                {
                  text: 'Yes',
                  onPress: () => BackgroundGeolocation.showAppSettings(),
                },
                {
                  text: 'No',
                  onPress: () => console.log('No Pressed'),
                  style: 'cancel',
                },
              ],
            ),
          1000,
        );
      }
    });

    BackgroundGeolocation.on('background', () => {
      console.log('[INFO] App is in background');
    });

    BackgroundGeolocation.on('foreground', () => {
      console.log('[INFO] App is in foreground');
    });

    BackgroundGeolocation.checkStatus((status) => {
      console.log(
        '[INFO] BackgroundGeolocation service is running',
        status.isRunning,
      );
      console.log(
        '[INFO] BackgroundGeolocation services enabled',
        status.locationServicesEnabled,
      );
      console.log(
        '[INFO] BackgroundGeolocation auth status: ' + status.authorization,
      );

      BackgroundGeolocation.start()
    });

    return () => {
      console.log('Removing all listeners');
      BackgroundGeolocation.removeAllListeners();
    };
  }, [location]);


  const [location, setLocation] = useState({
    latitude: 37.78825,
    longitude: -122.4324,
    latitudeDelta: 0.0922,
    longitudeDelta: 0.0421,
  });
  const [history, setHistory] = useState([]);
  const [distance, setDistance] = useState(0);

标签： javascriptreactjsreact-native