type argument ‘nw_proxy_config_t‘ is neither an Objective-C object nor a block type

Question

Cannot build on latest Xcode 15 Stable, iOS 17 stable

Related to https://github.com/pichillilorenzo/flutter_inappwebview/issues/1735

flutter run 

Could not build the precompiled application for the device.
Error (Xcode): type argument 'nw_proxy_config_t' (aka 'struct nw_proxy_config *') is neither an Objective-C object nor a block type
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS17.0.sdk/System/Library/Frameworks/WebKit.framework/Headers/WKWebsiteDataStore.h:119:46

Parse Issue (Xcode): Could not build module 'WebKit'
/build/ios/Debug-iphoneos/flutter_inappwebview/flutter_inappwebview.framework/Headers/flutter_inappwebview-Swift.h:285:8


Error launching application on iPhone 

Answer 1

Fix: Upgrade flutter from master branch, delete podfile.lock and rerun pod install

Temporal fix:

Workaround 1 from GitHub:

Use sudo and yor favorite text editor:

open /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS17.0.sdk/System/Library/Frameworks/WebKit.framework/Headers/WKWebsiteDataStore.h,

change the __IPHONE_OS_VERSION_MAX_ALLOWED from 170000 to 180000

Workaround 2:

post_integrate do |installer|
  compiler_flags_key = 'COMPILER_FLAGS'
  project_path = 'Pods/Pods.xcodeproj'

  project = Xcodeproj::Project.open(project_path)
  project.targets.each do |target|
    target.build_phases.each do |build_phase|
      if build_phase.is_a?(Xcodeproj::Project::Object::PBXSourcesBuildPhase)
        build_phase.files.each do |file|
          if !file.settings.nil? && file.settings.key?(compiler_flags_key)
            compiler_flags = file.settings[compiler_flags_key]
            file.settings[compiler_flags_key] = compiler_flags.gsub(/-DOS_OBJECT_USE_OBJC=0\s*/, '')
          end
        end
      end
    end
  end
  project.save()
end

Workaround 3 update

CocoaPods

gem install cocoapods 

and run :

flutter clean 

flutter upgrade

cd ios && pod repo update

flutter run 

Extra :

Update flutter_inappwebview to latest version ^5.8.0

And the project must build without problems

Answer 2

Update flutter_inappwebview to 5.8.0 works for me.