Undefined symbols for architecture arm64

Question

I am getting a Apple Mach-O Linker Error everytime I import a file from CocoaPods.

Undefined symbols for architecture arm64:
  \"_OBJC_CLASS_$_FBSession\", r         


        

Answer 1

If you faced this issue on your Flutter project while building in Release mode (or Archive) check out my this answer: https://stackoverflow.com/a/61446892/5502121 Long story short:

• set your build system to New Build System in File > Project Settings…
• remove ios and build_ios folders
• run flutter create . to init new ios module
• run pod install
• run flutter pub get
• check your Xcode build config (it should be Release mode and General iOS Device)

and you're good to go