如果您使用 Cocoapods，这是一个快速修复方法：

将其添加到你的 Podfile ->

post_install do |installer|
  installer.pods_project.targets.each do |target|
    if target.name == 'BoringSSL-GRPC'
      target.source_build_phase.files.each do |file|
        if file.settings && file.settings['COMPILER_FLAGS']
          flags = file.settings['COMPILER_FLAGS'].split
          flags.reject! { |flag| flag == '-GCC_WARN_INHIBIT_ALL_WARNINGS' }
          file.settings['COMPILER_FLAGS'] = flags.join(' ')
        end
      end
    end
  end
end

该问题来自 GRPC：

      '  # Uncomment this line to define a global platform for your project
  platform :ios, '16.0'

  # 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|
        # Modify existing XCConfig settings
        xcconfig_path = config.base_configuration_reference.real_path
        xcconfig = File.read(xcconfig_path)
  
        # Replace DT_TOOLCHAIN_DIR with TOOLCHAIN_DIR
        xcconfig_mod = xcconfig.gsub(/DT_TOOLCHAIN_DIR/, "TOOLCHAIN_DIR")
  
        # Remove the -G flag if it is specifically for BoringSSL-GRPC
        if target.name == 'BoringSSL-GRPC'
          xcconfig_mod.gsub!('-G', '')  # Removing the -G flag
        end
  
        # Write back the modified configuration
        File.open(xcconfig_path, "w") { |file| file << xcconfig_mod }
  
        # Additional build settings
        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '16.0'
        config.build_settings['EXCLUDED_ARCHS'] = 'arm64'  # Corrected the key name here
      end
    end
  
    # Apply additional Flutter-specific settings
    installer.pods_project.targets.each do |target|
      flutter_additional_ios_build_settings(target)
    end
  end
  
    '

这解决了我的问题，将这一行添加到 Podfile 中：xcconfig_mod.gsub!('-G', '') # Removing the -G flag'

并且：在某些情况下，可能需要调整 Xcode 设置以允许在框架模块中包含非模块化。

打开 Xcode 并导航到项目的构建设置。搜索“允许框架模块中的非模块化包含”。将其设置为“是”。