错误：Info.plist 中必须存在 `NSLocation*UsageDescription` 键之一才能使用地理定位

Question

When I want to test my app with Expo Go on iOS I get this error:

[Unhandled promise rejection: Error: One of the `NSLocation*UsageDescription` keys must be present in Info.plist to be able to use geolocation.]

Stack trace:
  node_modules\react-native\Libraries\BatchedBridge\NativeModules.js:104:50 in promiseMethodWrapper
  node_modules\expo-modules-core\build\NativeModulesProxy.native.js:15:23 in moduleName.methodInfo.name

I added that configuration to info.plist, rebuilt the project, but I get the same error, I also reinstalled node packages, but it didn't change anything.

package.json

    "dependencies": {
        "@expo/vector-icons": "^12.0.0",
        "expo": "~43.0.2",
        "expo-location": "~13.0.4",
        "expo-status-bar": "~1.1.0",
        "expo-task-manager": "~10.0.3",
        "react": "17.0.1",
        "react-dom": "17.0.1",
        "react-native": "0.64.3",
        "react-native-paper": "4.9.2",
        "react-native-web": "0.17.1",
        "expo-splash-screen": "~0.13.5",
        "expo-updates": "~0.10.13",
        "react-native-gesture-handler": "~1.10.2",
        "react-native-reanimated": "~2.2.0",
        "react-native-safe-area-context": "3.3.2",
        "react-native-screens": "~3.8.0"
      },
      "devDependencies": {
        "@babel/core": "^7.12.9"
      }

My js code

  const { status } = await Location.requestForegroundPermissionsAsync();
    if (status === "granted") {
      const background = await Location.requestBackgroundPermissionsAsync();
      if (background.status === "granted") {
        await Location.startLocationUpdatesAsync(TASK_FETCH_LOCATION, {
          activityType: Location.LocationActivityType.BestForNavigation,
          showsBackgroundLocationIndicator: true,
          accuracy: Location.Accuracy.BestForNavigation,
          deferredUpdatesInterval: 3000,
          deferredUpdatesDistance: 50,
          showsBackgroundLocationIndicator: true,
        }).then(() => {
          Alert.alert("Turn on", null, [
            { text: "OK", onPress: () => console.log("listening gps") },
          ]);
        });
      }
    }

app.json

   "ios": {
      "supportsTablet": true,
      "infoPlist": {
        "UIBackgroundModes": [
          "location",
          "fetch"
        ],
        "NSLocationAlwaysAndWhenInUseUsageDescription": "Allows App to use location services in the foreground and background.",
        "NSFaceIDUsageDescription": "Allows App to use Face ID for a simpler sign in."
      }
    }

Answer 1

You need to explicitly set these key-string pair inside of the Info.plist of your project.

    <key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
    <string>Your geolocation string</string>

Answer 2

my app.config looks like that:

{
  "expo": {
   ...
    "ios": {
      "supportsTablet": true,
      "infoPlist": {
        "UIBackgroundModes": [
          "location",
          "fetch"
        ],
        "NSLocationWhenInUseUsageDescription": "text",
        "NSLocationAlwaysAndWhenInUseUsageDescription": "text",
        "NSLocationAlwaysUsageDescription": "text"
    }
    },
    "android": {
      "adaptiveIcon": {
        "foregroundImage": "./assets/adaptive-icon.png",
        "backgroundColor": "#FFFFFF"
      },
      "permissions": [
          "ACCESS_BACKGROUND_LOCATION"
        ]
    },
    ...
  }
}

But I am getting still the same warning you are getting. I also copied that code ( https://chafikgharbi.com/expo-location-tracking/ ) one by one, but still I am getting the warning und background is not working on my iphone. Does someone have a hint? I really don't want to eject the expo app...