//修改Podfile文件里面的这一段。

post_installdo |installer|

installer.pods_project.targets.eachdo |target|

flutter_additional_ios_build_settings(target)

target.build_configurations.eachdo |config|

config.build_settings['IPHONEOS_DEPLOYMENT_TARGET']= '14.0'

    end

end

end

# post_install do |installer|

#  installer.pods_project.targets.each do |target|

#    flutter_additional_ios_build_settings(target)

#  end

# end