Flutter 环境配置（MAC）

直奔主题官方网站配置写的很详细了https://flutter.cn/docs/get-started/install
这里说下我的问题：

执行 flutter doctor 安装相关依赖报错

product@productdeMacBook-Pro Flutter % flutter doctor
Downloading Dart SDK from Flutter engine d1bc06f032f9d6c148ea6b96b48261d6f545004f...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
  0     0    0     0    0     0      0      0 --:--:--  0:01:45 --:--:--     0
curl: (35) LibreSSL SSL_connect: SSL_ERROR_SYSCALL in connection to storage.googleapis.com:443 

Failed to retrieve the Dart SDK from: https://storage.googleapis.com/flutter_infra/flutter/d1bc06f032f9d6c148ea6b96b48261d6f545004f/dart-sdk-darwin-x64.zip
If you're located in China, please see this page:
  https://flutter.dev/community/china

解决办法

在 Linux 和 macOS Mojave 或 Mojave 之前的系统里，是默认使用 Bash 的，所以需要修改 .bashrc 文件。 macOS Catalina 操作系统默认使用 Z Shell，所以需要修改 .zshrc 文件
macOS Catalina 操作系统默认使用 Z Shell，所以需要修改 .zshrc 文件

vim ~/.bashrc
添加如下代码，然后执行flutter doctor

export PUB_HOSTED_URL=https://pub.flutter-io.cn
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn
export FLUTTER=/Users/Compass/Library/flutter/bin
export PATH=$PATH:$FLUTTER

输入下载进度

Downloading Dart SDK from Flutter engine d1bc06f032f9d6c148ea6b96b48261d6f545004f...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
 92  247M   92  229M    0     0   171k      0  0:24:34  0:22:49  0:01:45  184k

安装成功

Building flutter tool...

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