[Bug]: Apple complains about the need for NSLocationAlwaysAndWhenInUseUsageDescription about flutter-geolocator

[TimHoogstrate]

Dear @781flyingdutchman,

Thanks for your input. I'll label this issue as an enhancement to keep track of it.

Kind regards,

[781flyingdutchman]

I've submitted a PR for this

[mvanbeusekom]

Solved in PR #1404, thanks @781flyingdutchman.

[yogeshelevn]

@mvanbeusekom @781flyingdutchman The current library version does not address this issue. I encounter it consistently whenever attempting to release the app to the app store. So far, I've attempted to clean the Flutter project and have followed the two solutions outlined in the official library documentation, yet to no avail. This roadblock is hindering me from releasing the app on the Play Store. Your assistance in resolving this matter would be greatly appreciated. Please Help.
1 --> f you don't need to receive updates when your app is in the background, then add a compiler flag as follows: in XCode, click on Pods, choose the Target 'geolocator_apple', choose Build Settings, in the search box look for 'Preprocessor Macros' then add the BYPASS_PERMISSION_LOCATION_ALWAYS=1 flag. Setting this flag prevents your app from requiring the NSLocationAlwaysAndWhenInUseUsageDescription entry in Info.plist, and avoids questions from Apple when submitting your app.
2 -->

post_install do |installer|
  installer.pods_project.targets.each do |target|
    if target.name == "geolocator_apple"
      target.build_configurations.each do |config|
        config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)', 'BYPASS_PERMISSION_LOCATION_ALWAYS=1']
      end
    end
  end
end

ITMS-90683: Missing purpose string in Info.plist - Your app’s code references one or more APIs that access sensitive user data, or the app has one or more entitlements that permit such access. The Info.plist file for the “Runner.app” bundle should contain a NSLocationAlwaysAndWhenInUseUsageDescription key with a user-facing purpose string explaining clearly and completely why your app needs the data. If you’re using external libraries or SDKs, they may reference APIs that require a purpose string. While your app might not use these APIs, a purpose string is still required. For details, visit: https://developer.apple.com/documentation/uikit/protecting_the_user_s_privacy/requesting_access_to_protected_resources.

[781flyingdutchman]

That is strange: the use of compiler flags ensures that the code containing references to the API for background location is skipped (not compiled) so it does not appear in the binary that you submit to Apple. The fact that you get this response still from Apple suggests that the flag is not set correctly (by default, the code containing the API reference is compiled).

As I mentioned to @mvanbeusekom the structure of the plugin makes it difficult for me to test, but what I can say is that if the flag is set correctly, then the code that references the sensitive API should show 'dimmed' in Xcode. Perhaps you can check if that's the case for you @yogeshelevn : the file is https://github.com/Baseflow/flutter-geolocator/blob/main/geolocator_apple/ios/Classes/Handlers/PermissionHandler.m, so find that file in your XCode project, and the lines that should show dimmed are 76-78 and 95-104. If they don't show dimmed after you have set the flag manually, then somehow you have not set the flag correctly!

[yogeshelevn]

@781flyingdutchman I checked in my xcode project. line number from 76-78, 95-104 is dimmed as you mentioned still I am getting the issue. This is my PodFile and please do let me lnow it is correct or not.

# Uncomment this line to define a global platform for your project
# platform :ios, '11.0'
platform :ios, '14.0'
# CocoaPods analytics sends network stats synchronously affecting flutter build latency.
ENV['COCOAPODS_DISABLE_STATS'] = 'true'

project 'Runner', {
  'Debug' => :debug,
  'Profile' => :release,
  'Release' => :release
}

def flutter_root
  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'Generated.xcconfig'), __FILE__)
  unless File.exist?(generated_xcode_build_settings_path)
    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure flutter pub get is executed first"
  end

  File.foreach(generated_xcode_build_settings_path) do |line|
    matches = line.match(/FLUTTER_ROOT\=(.*)/)
    return matches[1].strip if matches
  end
  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Generated.xcconfig, then run flutter pub get"
end

require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)

flutter_ios_podfile_setup

target 'Runner' do
  use_frameworks!
  use_modular_headers!

  flutter_install_all_ios_pods File.dirname(File.realpath(__FILE__))
  target 'RunnerTests' do
    inherit! :search_paths
  end
end

# post_install do |installer|
#   installer.pods_project.targets.each do |target|
#     if target.name == "geolocator_apple"
#       target.build_configurations.each do |config|
#         config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)', 'BYPASS_PERMISSION_LOCATION_ALWAYS=1']
#       end
#     end
#   end
# end

post_install do |installer|
  installer.pods_project.targets.each do |target|
    flutter_additional_ios_build_settings(target)
    if target.name == "geolocator_apple"
      target.build_configurations.each do |config|
        config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= ['$(inherited)', 'BYPASS_PERMISSION_LOCATION_ALWAYS=1']
      end
    end
    target.build_configurations.each do |config|
      config.build_settings['ONLY_ACTIVE_ARCH'] = 'NO'
      config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '14.0'
      # You can remove unused permissions here
      # for more infomation: https://github.com/BaseflowIT/flutter-permission-handler/blob/master/permission_handler/ios/Classes/PermissionHandlerEnums.h
      # e.g. when you don't need camera permission, just add 'PERMISSION_CAMERA=0'
      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
        '$(inherited)',
        'PERMISSION_CONTACTS=1',
        ## dart: PermissionGroup.camera
        'PERMISSION_CAMERA=1',
        ## dart: PermissionGroup.photos
        'PERMISSION_PHOTOS=1',
        ## dart: [PermissionGroup.location, PermissionGroup.locationAlways, PermissionGroup.locationWhenInUse]
        'PERMISSION_LOCATION=1',
        'PERMISSION_NOTIFICATIONS=1',
        ## dart: PermissionGroup.mediaLibrary
        'PERMISSION_MEDIA_LIBRARY=1',
      ]
    end
    awesome_pod_file = File.expand_path(File.join('plugins', 'awesome_notifications', 'ios', 'Scripts', 'AwesomePodFile'), '.symlinks')
    require awesome_pod_file
    update_awesome_pod_build_settings(installer)
  end
  awesome_pod_file = File.expand_path(File.join('plugins', 'awesome_notifications', 'ios', 'Scripts', 'AwesomePodFile'), '.symlinks')
  require awesome_pod_file
  update_awesome_main_target_settings('Runner', File.dirname(File.realpath(__FILE__)), flutter_root)
end

https://drive.google.com/file/d/1EHP7dOXJQFmXE9M-6UOIwftIsZH_9k6X/view?usp=sharing
https://drive.google.com/file/d/1g20urjIxHxNQwqFdEmgjfeiz2Q0RBQ_O/view?usp=sharing

[781flyingdutchman]

Very strange. @mvanbeusekom do you have any idea how this could then still get compiled? Did you come across this issue with anyone else?

[mvanbeusekom]

Hi @yogeshelevn,

I think the problem here is not with the configuration of the geolocator but with the permission_handler plugin. From the supplied content of the Podfile I see the application uses the permission_handler plugin and enables the PERMISSION_LOCATION setting.

Unfortunately the permission_handler does not yet make a distinction between "Location when in use" or "Location always" and declaring the PERMISSION_LOCATION=1 definition includes Objective-C code that calls the requestAlwaysAuthorization method of the CLLocationManager SDK. This is most likely what Apple's static code analysis causes to trigger the error.

At the moment there are two workarounds for you to take:

1. Include the missing NSLocationAlwaysAndWhenInUseUsageDescription key in the ios/Runner/Info.plist or;
2. Fallback on the geolocator plugin to request the location permissions and disable / remove the PERMISSION_LOCATION=1 line from the ios/Podfile.

Alternatively I will research if we can add additional macros in the permission_handler plugin to allow more fine grained control.