Error: “Building for iOS Simulator, but linking in dylib built for iOS, file ‘…’ for architecture arm64”

If you face this problem while trying to run Xcode project on the iOS Simulator, please try the solution below:

1. Exclude arm4 from Architectures

• Simply edit each type (Debug, Profile, Release), and click + to add arm64 to the current list

2. Exclude arm64 from your Pods

• Open your Podfile and add this to exclude arm64 from all of your current Pods:

post_install do |installer|
  installer.pods_project.build_configurations.each do |config|
    config.build_settings["EXCLUDED_ARCHS[sdk=iphonesimulator*]"] = "arm64"
  end
end

• Then run this to update your Pods

$ pod install

(Optional) 3. Define your libraries as Optional

• Consider marking some of your libraries as Optional if you’re sure they won’t run well on the iOS Simulator

(Optional) 4. Use pre-defined macro to split your code flow

• Use these macros to split your source code between Simulator and actual iPhone during runtime:

#if TARGET_IPHONE_SIMULATOR
  // Don't use framework
  ...
#else
  // Use framework
  ...
#endif

#if targetenvironment(simulator)
  // Don't use framework
  ...
#else
  // Use framework
  ...
#endif

I hope that this helps

Happy debugging :)