报错如下：

[!] An error occurred while processing the post-install hook of the Podfile.

/Users/apple/fvm/versions/2.10.4/bin/cache/artifacts/engine/ios/Flutter.xcframework must exist. If you're running pod install manually, make sure "flutter precache --ios" is executed first

/Users/apple/fvm/versions/2.10.4/packages/flutter_tools/bin/podhelper.rb:46:in `flutter_additional_ios_build_settings'
/Users/apple/yu_liao/ios/Podfile:46:in `block (3 levels) in from_ruby'
/Users/apple/yu_liao/ios/Podfile:45:in `each'
/Users/apple/yu_liao/ios/Podfile:45:in `block (2 levels) in from_ruby'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-core-1.11.3/lib/cocoapods-core/podfile.rb:196:in `post_install!'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:945:in `run_podfile_post_install_hook'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:933:in `block in run_podfile_post_install_hooks'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/user_interface.rb:149:in `message'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:932:in `run_podfile_post_install_hooks'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:331:in `block (2 levels) in create_and_save_projects'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/installer/xcode/pods_project_generator/pods_project_writer.rb:61:in `write!'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:330:in `block in create_and_save_projects'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/user_interface.rb:64:in `section'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:309:in `create_and_save_projects'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:301:in `generate_pods_project'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:180:in `integrate'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/installer.rb:167:in `install!'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/command/install.rb:52:in `run'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/claide-1.1.0/lib/claide/command.rb:334:in `run'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:52:in `run'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/gems/cocoapods-1.11.3/bin/pod:55:in `<top (required)>'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/bin/pod:23:in `load'
/usr/local/Cellar/cocoapods/1.11.3_1/libexec/bin/pod:23:in `<main>'

解决方法：如果该项目使用了FVM，那么执行flutter pub get时，前面要加fvm，否则不需要加。