XCode showing warning [CoreLocation] This method can cause UI unresponsiveness if invoked on the main thread.

[karel-suchomel-ed]

Bug summary

I am using location permissions in my app and noticed XCode showing this warning:
"This method can cause UI unresponsiveness if invoked on the main thread. Instead, consider waiting for the -locationManagerDidChangeAuthorization: callback and checking authorizationStatus first."

I haven't personally experienced any issues, nor have the current users, but it is worth investigating

Library version

3.8.0

Environment info

System:
  OS: macOS 13.2
  CPU: (8) arm64 Apple M1
  Memory: 165.56 MB / 8.00 GB
  Shell:
    version: 5.8.1
    path: /bin/zsh
Binaries:
  Node:
    version: 20.3.0
    path: /opt/homebrew/bin/node
  Yarn:
    version: 1.22.19
    path: /opt/homebrew/bin/yarn
  npm:
    version: 9.6.7
    path: /opt/homebrew/bin/npm
  Watchman:
    version: 2023.06.08.00
    path: /opt/homebrew/bin/watchman
Managers:
  CocoaPods:
    version: 1.12.1
    path: /opt/homebrew/bin/pod
SDKs:
  iOS SDK:
    Platforms:
      - DriverKit 22.2
      - iOS 16.2
      - macOS 13.1
      - tvOS 16.1
      - watchOS 9.1
  Android SDK:
    API Levels:
      - "29"
      - "30"
      - "31"
      - "32"
      - "33"
      - "34"
    Build Tools:
      - 29.0.2
      - 30.0.2
      - 30.0.3
      - 31.0.0
      - 33.0.0
    System Images:
      - android-29 | Intel x86 Atom
      - android-30 | Google APIs Intel x86 Atom
      - android-30 | Google Play ARM 64 v8a
      - android-31 | Google APIs ARM 64 v8a
      - android-31 | Google APIs Intel x86 Atom_64
    Android NDK: 22.1.7171670
IDEs:
  Android Studio: 2022.1 AI-221.6008.13.2211.9514443
  Xcode:
    version: 14.2/14C18
    path: /usr/bin/xcodebuild
Languages:
  Java:
    version: javac 20
    path: /usr/bin/javac
  Ruby:
    version: 3.2.2
    path: /opt/homebrew/opt/ruby/bin/ruby
npmPackages:
  "@react-native-community/cli": Not Found
  react:
    installed: 18.2.0
    wanted: 18.2.0
  react-native:
    installed: 0.72.0
    wanted: 0.72.0
  react-native-macos: Not Found
npmGlobalPackages:
  "*react-native*": Not Found
Android:
  hermesEnabled: true
  newArchEnabled: false
iOS:
  hermesEnabled: true
  newArchEnabled: false

Steps to reproduce

1. init RN project
2. install and setup this library
3. add Permission-LocationWhenInUse pod
4. run the project and check XCode warnings

Reproducible sample code

A plain React Native init project is enough for this to occur

[zoontek]

@karel-suchomel-ed I already noticed this, and as you mention it's a false positive 🙂

[iArchin]

@zoontek I also have this exact issue and one of my screens becomes completely blank and "unresponsive" and I should mention that I have this problem in iOS 17. all good for older versions.

Library version

3.9.2

Environment info

System:
    OS: macOS 14.0
    CPU: (16) x64 Intel(R) Core(TM) i7-10700K CPU @ 3.80GHz
    Memory: 1.96 GB / 16.00 GB
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 16.14.0 - ~/.nvm/versions/node/v16.14.0/bin/node
    Yarn: 3.3.0 - /usr/local/bin/yarn
    npm: 8.3.1 - ~/.nvm/versions/node/v16.14.0/bin/npm
    Watchman: 2023.09.25.00 - /usr/local/bin/watchman
  Managers:
    CocoaPods: 1.13.0 - /usr/local/bin/pod
  SDKs:
    iOS SDK:
      Platforms: DriverKit 21.4, iOS 15.5, macOS 12.3, tvOS 15.4, watchOS 8.5
    Android SDK: Not Found
  IDEs:
    Android Studio: Not Found
    Xcode: 13.4.1/13F100 - /usr/bin/xcodebuild
  Languages:
    Java: 11.0.12 - /usr/bin/javac
  npmPackages:
    @react-native-community/cli: Not Found
    react: 18.2.0 => 18.2.0 
    react-native: 0.71.13 => 0.71.13 
    react-native-macos: Not Found
  npmGlobalPackages:
    *react-native*: Not Found

[zoontek]

@iArchin Could you try v4: #808? (mostly because of a85e23d)

[zoontek]

@iArchin Just shipped 3.9.3 and 4.0.0 alpha 3 to fix it.

[iArchin]

@zoontek I can confirm that after upgrading to the version 3.9.3 issue is resolved. ty.