1.配置flutter环境变量
进入终端 vim ~/.bash_profile
export ANDROID_HOME=~Library/Android/sdk
export PATH=$PATH:ANDROID_HOME/tools:$ANDROID_HOME/platform-tools
export PUB_HOSTED_URL=https://pub.flutter-io.cn
export FLUTTER_STORAGE_BASE_URL=https://storagge.flutter-io.cn
export PATH=/Users/用户名/Desktop/flutter/flutter/bin:$PATH