1.从gitthub拉取代码：git clone -b beta https://github.com/flutter/flutter.git

2.配置环境变量：在当期用户目录下创建.bash_profile文件，如果该文件已经存在，则直接打开。将以下代码复制到.bash_profile中，

    export PATH_TO_FLUTTER_GIT_DIRECTORY=/Users/你的用户名/flutter

    export PATH=${PATH}:${PATH_TO_FLUTTER_GIT_DIRECTORY}/bin

完成之后点击保存，在命令行中执行source  .bash_profile，然后输入flutter 进行测试。没有出现commond not found 即是配置成功。

3.执行命令flutter doctor ，命令的作用是检测还需要安装的依赖。

[✓]Flutter(Channel beta,v0.1.5,on Mac OS X 10.13.3 17D102,locale zh-Hans-CN)

[✓]Android toolchain – develop for Android devices(Android SDK 27.0.3)

[!]iOS toolchain – develop for iOS devices(Xcode 9.2)  //ios环境

    ✗ libimobiledevice and ideviceinstaller are not installed. To install, run:

        brew install –HEAD libimobiledevice

        brew install ideviceinstaller

    ✗ ios-deploy not installed. To install:

        brew install ios-deploy

[✓]Android Studio(version 3.0)   //表示android 环境已经搭建好

[!]IntelliJ IDEA Ultimate Edition(version 2017.3.1)

    ✗ Flutter plugin not installed; this adds Flutter specific functionality.

    ✗ Dart plugin not installed; this adds Dart specific functionality.

[✓]VS Code(version 1.21.0)  //编辑器插件检测

[!]Connected devices 连接的设备

    ! No devices available