一直报错：

[Error Regarding undefined method `map' for nil:NilClass for Flutter App / CocoaPod Error]

解决办法：
终端执行：

sudo arch -x86_64 gem install ffi

参考自：
https://stackoverflow.com/questions/67443265/error-regarding-undefined-method-map-for-nilnilclass-for-flutter-app-cocoap