安装 fvm

dart pub global activate fvm

拷贝以下内容到你的 .bashrc|.zshrc ... 文件中

export PATH="$PATH":"$HOME/.pub-cache/bin"
source ~/.zshrc

查看 fvm 命令

(base) ➜  ~ fvm -h
Flutter Version Management: A cli to manage Flutter SDK versions.

Usage: fvm <command> [arguments]

Global options:
-h, --help       Print this usage information.
    --verbose    Print verbose output.
    --version    current version

Available commands:
  config     Set configuration for FVM
  dart       Proxies Dart Commands
  doctor     Shows information about environment, and project configuration.
  flavor     Switches between different project flavors
  flutter    Proxies Flutter Commands
  global     Sets Flutter SDK Version as a global
  install    Installs Flutter SDK Version
  list       Lists installed Flutter SDK Versions
  releases   View all Flutter SDK releases available for install.
  remove     Removes Flutter SDK Version
  spawn      Spawns a command on a Flutter version
  use        Sets Flutter SDK Version you would like to use in a project

Run "fvm help <command>" for more information about a command.

安装最新稳定版本 2.2.0

(base) ➜  ~ fvm install 2.2.0
Flutter "2.2.0" is not installed.

Installing version: 2.2.0...
Cloning into '/Users/liushuai/fvm/versions/2.2.0'...
remote: Enumerating objects: 303573, done.
remote: Total 303573 (delta 0), reused 0 (delta 0), pack-reused 303573
Receiving objects: 100% (303573/303573), 140.02 MiB | 1.85 MiB/s, done.
Resolving deltas: 100% (234946/234946), done.
Updating files: 100% (5159/5159), done.
Downloading Dart SDK from Flutter engine a9d88a4d182bdae23e3a4989abfb7ea25954aad1...
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  200M  100  200M    0     0  1737k      0  0:01:57  0:01:57 --:--:-- 1157k
Building flutter tool...
Connection closed before full header was received
Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (9 tries left)
Connection closed before full header was received
Error: Unable to 'pub upgrade' flutter tool. Retrying in five seconds... (8 tries left)
Flutter 2.2.0 • channel unknown • unknown source
Framework • revision b22742018b (8 days ago) • 2021-05-14 19:12:57 -0700
Engine • revision a9d88a4d18
Tools • Dart 2.13.0

设置默认版本

(base) ➜  ~ fvm global 2.2.0
Flutter "2.2.0" has been set as global
However your "flutter" path current points to:

/Users/liushuai/bin/flutter/bin
to use global Flutter SDK through FVM you should change it to:

/Users/liushuai/fvm/default/bin