使用14.3的Xcode创建iOS项目后，执行pod init创建Podfile文件时报出如下错误
# [Ignoring ffi-1.13.1 because its extensions are not built.
Try: gem pristine ffi --version 1.13.1](https://stackoverflow.com/questions/64698820/ignoring-ffi-1-13-1-because-its-extensions-are-not-built-try-gem-pristine-ffi)
当我使用 gem pristine ffi --version 1.13.1 命令后 提示无权限
WARNING: You don't have /Users/mzying/.gem/ruby/2.6.0/bin in your PATH,
gem executables will not run.
我加入 sudo 执行sudo gem pristine ffi --version 1.13.1 似乎有所效果。但是再次执行pod init 还是报错了
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface/error_report.rb:34:in `force_encoding': **can't modify frozen String (** **FrozenError** **)**
from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface/error_report.rb:34:in `report'
from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:66:in `report_error'
from /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:396:in `handle_exception'
from /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:337:in `rescue in run'
from /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:324:in `run'
from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:52:in `run'
from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/bin/pod:55:in `<top (required)>'
from /usr/local/bin/pod:23:in `load'
from /usr/local/bin/pod:23:in `<main>'
/Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.21.0/lib/xcodeproj/project.rb:228:in `initialize_from_file': **[Xcodeproj] Unknown object version (56). (** **RuntimeError** **)**
from /Library/Ruby/Gems/2.6.0/gems/xcodeproj-1.21.0/lib/xcodeproj/project.rb:113:in `open'
from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command/init.rb:41:in `validate!'
from /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:333:in `run'
from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:52:in `run'
from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/bin/pod:55:in `<top (required)>'
from /usr/local/bin/pod:23:in `load'
from /usr/local/bin/pod:23:in `<main>'
在做了几次尝试和看了一些资料后，发现下面这种解决方式是有效果的
选择
13.0后再次执行pod init 发现成功了。
希望可以帮到遇到这种问题的朋友，如果有更优雅的解决办法，欢迎评论指导。
