How to access .env variables in AppDelegate.m from Flutter applications?

Question

as instructed from a similar problem Hide Google Maps API key from source control in a Flutter app

AppDelegate.m

#include "AppDelegate.h"
#include "GeneratedPluginRegistrant.h"
#import "GoogleMaps/GoogleMaps.h"

@implementation AppDelegate

- (BOOL)application:(UIApplication *)application
    didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
     NSString* mapsApiKey = [[NSProcessInfo processInfo] environment][@"FLUTTER_GMAPS_API_KEY"];
  [GMSServices provideAPIKey: mapsApiKey];
  [GeneratedPluginRegistrant registerWithRegistry:self];
  return [super application:application didFinishLaunchingWithOptions:launchOptions];
}

@end

If i change provideApiKey to @"theApiKeyImTryingToHide" everything works fine.

user_3495321 · Answer

I found this question by searching answer for the react-native lib maybe for someone it can be useful.

so, to read variable from env in RN you have to add

NSString *mapsApiKey = [ReactNativeConfig envFor:@"GOOGLE_MAPS_API_KEY"];
[GMSServices provideAPIKey: mapsApiKey];

into top of didFinishLaunchingWithOptions method in AppDelegate.m file and firstly don't forget to import

#import "ReactNativeConfig.h"

ReactNativeConfig provide GOOGLE_MAPS_API_KEY

user_6489066 · Answer

Can you check from your shell if your env variable FLUTTER_GMAPS_API_KEY is being set properly ?

Also check this AppDelegate.m file from the official maps repo if it helps

https://github.com/flutter/plugins/blob/master/packages/google_maps_flutter/google_maps_flutter/example/ios/Runner/AppDelegate.m

user_2532763 · Answer

It is possible to use your maps api key in AndroidManifest.xml and AppDelegate.swift files from the same .env file using the flutter_config package. For details refer to this SO answer https://stackoverflow.com/a/65448051/2532763

How to access .env variables in AppDelegate.m from Flutter applications?

3 Answers