使用Xcode归档iOS应用时出现‘Flutter/Flutter.h文件未找到’错误

• 尝试通过Xcode的Product菜单选择Archive上传应用至App Store Connect，Pod安装无报错，但构建失败，具体错误见截图
• 终端执行flutter build ios --release命令，同样触发构建错误，错误信息较长，开头内容见截图
• 已执行flutter clean、pod disintegrate、pod install等操作，问题未解决

附Podfile内容： #

# Uncomment this line to define a global platform for your project
# platform :ios, '12.0'

# 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|
   target.build_configurations.each do |config|
    config.build_settings.delete 'IPHONEOS_DEPLOYMENT_TARGET'
   end
  end
 end

内容的提问来源于stack exchange，提问作者fahim irfan