一、在macOS上配置Flutter环境变量

下载最新的Flutter SDK

1、官网下载地址：https://flutter.dev/docs/development/tools/sdk/releases?tab=macos#macos
2、GitHub下载地址：https://github.com/flutter/flutter/releases
⚠️：在macOS上下载最新的flutter sdk以后，会自动解压到当前下载文件夹，你要做的就是将解压后的flutter文件放置到你想进行flutter开发的文件夹下，并通过pwd命令获取当前文件夹路径以备用；

添加环境变量：

1、通过 bogon:fileDir auth$ cd ~进入到用户文件夹下；
2、使用bogon:~ auth$ vi .bash_profile命令打开bash命令文件，配置flutter环境变量；
注意：此处若有.bash_profile文件可以使用上述命令直接进行编辑，若没有，则使用touch .bash_profile命令创建该文件，再使用上述命令进入编辑页面
3、在vi界面点击i，再复制粘贴如下代码：

export PUB_HOSTED_URL=https://pub.flutter-io.cn #国内用户需要设置
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn #国内用户需要设置
export PATH=刚才下载后解压的flutter文件路径/flutter/bin:$PATH

修改以后的文件如下图所示：

image.png
4、点击esc键退出vi编辑，再点击shift Q组合键，输入wq保存文件并回到命令行界面；
5、输入bogon:~ auth$ source .bash_profile运行.bash_profile添加环境变量；
6、输入bogon:~ auth$ flutter -h不出现-bash: flutter: command not found，并能够查看flutter的帮助命令，说明环境变量配置成功；

bogon:~ auth$ flutter -h
Manage your Flutter app development.

Common commands:

  flutter create <output directory>
    Create a new Flutter project in the specified directory.

  flutter run [options]
    Run your Flutter application on an attached device or in an emulator.

Usage: flutter <command> [arguments]

Global options:
-h, --help                  Print this usage information.
-v, --verbose               Noisy logging, including all shell commands executed.
                            If used with --help, shows hidden options.

-d, --device-id             Target device id or name (prefixes allowed).
    --version               Reports the version of this tool.
    --suppress-analytics    Suppress analytics reporting when this command runs.
    --bug-report            Captures a bug report file to submit to the Flutter team.
                            Contains local paths, device identifiers, and log snippets.

    --packages              Path to your ".packages" file.
                            (required, since the current directory does not contain a ".packages" file)

Available commands:
  analyze                  Analyze the project's Dart code.
  attach                   Attach to a running application.
  bash-completion          Output command line shell completion setup scripts.
  build                    Flutter build commands.
  channel                  List or switch flutter channels.
  clean                    Delete the build/ and .dart_tool/ directories.
  config                   Configure Flutter settings.
  create                   Create a new Flutter project.
  devices                  List all connected devices.
  doctor                   Show information about the installed tooling.
  drive                    Runs Flutter Driver tests for the current project.
  emulators                List, launch and create emulators.
  format                   Format one or more dart files.
  help                     Display help information for flutter.
  install                  Install a Flutter app on an attached device.
  logs                     Show log output for running Flutter apps.
  make-host-app-editable   Moves host apps from generated directories to non-generated directories so that they
                           can be edited by developers.
  packages                 Commands for managing Flutter packages.
  precache                 Populates the Flutter tool's cache of binary artifacts.
  run                      Run your Flutter app on an attached device.
  screenshot               Take a screenshot from a connected device.
  stop                     Stop your Flutter app on an attached device.
  test                     Run Flutter unit tests for the current project.
  trace                    Start and stop tracing for a running Flutter app.
  upgrade                  Upgrade your copy of Flutter.
  version                  List or switch flutter versions.

Run "flutter help <command>" for more information about a command.
Run "flutter help -v" for verbose help output, including less commonly used options.

查看本机的flutter开发环境支持，按需进行开发环境搭建

bogon:~ auth$ flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.5.4-hotfix.2, on Mac OS X 10.14.5 18F132, locale zh-Hans-CN)
 
[!] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses
[!] iOS toolchain - develop for iOS devices (Xcode 10.1)
    ✗ libimobiledevice and ideviceinstaller are not installed. To install with Brew, run:
        brew update
        brew install --HEAD usbmuxd
        brew link usbmuxd
        brew install --HEAD libimobiledevice
        brew install ideviceinstaller
    ✗ ios-deploy not installed. To install:
        brew install ios-deploy
    ✗ CocoaPods not installed.
        CocoaPods is used to retrieve the iOS platform side's plugin code that responds to your plugin usage on
        the Dart side.
        Without resolving iOS dependencies with CocoaPods, plugins will not work on iOS.
        For more info, see https://flutter.dev/platform-plugins
      To install:
        brew install cocoapods
        pod setup
[!] Android Studio
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[!] IntelliJ IDEA Ultimate Edition (version 2018.2.4)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[!] VS Code (version 1.34.0)
    ✗ Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[!] Connected device
    ! No devices available

! Doctor found issues in 6 categories.