在Flutter中使用protobuf (Mac OS环境)

(1)下载protobuf zip包 https://github.com/protocolbuffers/protobuf/releases

./configure
 make
 make check
 sudo make install
 sudo ldconfig

检查是否安装成功: protoc --version

(2) 安装 protoc_plugin

dart pub global activate protoc_plugin [版本号]
eg:
dart pub global activate protoc_plugin 19.3.1

(3)设置环境变量

# 在Flutter中使用protobuf
export PATH="/Users/xxx/Downloads/FlutterSDK/flutter/.pub-cache/bin:$PATH" 
也可以是：
export PATH="$PATH":"$HOME/.pub-cache/bin"