Xcode > Runner >信息部署目标> IOS部署目标:11 ．

开放终端:

pod cache clean --all

.

pod update

对我有用:

rm ios/Podfile
flutter pub upgrade
flutter pub get
cd ios && pod update
flutter clean && flutter run
sudo arch -x86_64 gem install ffi
arch -x86_64 pod install 

我在构建React Native项目时也遇到了同样的问题

Cocoapods版本更新对我有效(从1.8.4升级到1.11.2)

迭代Tao-Nhan Nguyen的答案，计算每个pod的原始值集，只在它不大于8.0时调整它……在Podfile中添加以下内容:

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      if Gem::Version.new('8.0') > Gem::Version.new(config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'])
        config.build_settings['IPHONEOS_DEPLOYMENT_TARGET'] = '8.0'
      end
    end
  end
end

我解决了这个问题，我把build system从New build system改为Legacy build system

在Xcode v10+中，选择文件>项目设置

在之前的Xcode中，选择File > Workspace Settings

将Build System从New Build System更改为Legacy Build System—>单击Done。

如果有人在更新到最新的react本机时遇到问题，请尝试更新pod文件

  use_flipper!
  post_install do |installer|
    flipper_post_install(installer)
    installer.pods_project.targets.each do |target|
      target.build_configurations.each do |config|
        config.build_settings.delete 'IPHONEOS_DEPLOYMENT_TARGET'
      end
    end
   end