mac下Flutter的安装、环境搭建

安装之前的环境：

pod: 1.5.3
xcode : 10.1

1. 获取Flutter SDK

通过官网地址：https://flutter.io/sdk-archive/#windows 下载最新的SDK

2. 配置环境变量

进入文件.bash_profile ，如果没有就通过命令创建一个 touch .bash_profile

xia:~ mac$ vim .bash_profile

在文件中加入一行

export PATH={pwd}/flutter/bin:$PATH

其中pwd是下载的flutter所在的文件路径
例如，我的flutter下载之后放在了~/flutter路径下，那么我的就是

export PATH=~/flutter/bin:$PATH

接下来运行source命令，更新配置

xia:~ mac$ source .bash_profile

3. 运行Flutter

执行命令

xia:~ mac$ flutter -h

应该会出现' Welcome to Flutter! '的欢迎语，具体命令输出就不粘贴了

4. 检查Flutter环境

执行命令flutter doctor

xia:~ mac$ flutter doctor

此时我的窗口出现了下面的输出，显示[✗][!]就是错误和警告的地方，接下来按照提示一步一步解决

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.2.1, on Mac OS X 10.14.2 18C54, locale
    zh-Hans-CN)
[✗] Android toolchain - develop for Android devices
    ✗ Unable to locate Android SDK.
      Install Android Studio from:
      https://developer.android.com/studio/index.html
      On first launch it will assist you in installing the Android SDK
      components.
      (or visit https://flutter.io/setup/#android-setup for detailed
      instructions).
      If Android SDK has been installed to a custom location, set ANDROID_HOME
      to that location.
      You may also want to add it to your PATH environment variable.

[!] 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
[!] Android Studio (not installed)
[!] VS Code (version 1.28.2)
    ✗ Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[✓] Connected device (1 available)

! Doctor found issues in 4 categories.

1. 安装Android Studio、Android SDK、Flutter插件、Dark插件

此时并未安装Android SDK。第一步安装Android Studio之后，启动，会弹出一个框，点击cancel，接下来Android Studio会自动安装SDK。安装好了之后，重启Android Studio，在Android Studio-Preference-Plugins中安装Fluuter和Dark插件

再次执行 flutter doctor 命令

[✓] Flutter (Channel stable, v1.2.1, on Mac OS X 10.14.2 18C54, locale zh-Hans-CN)
[!] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    ✗ 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
[!] Android Studio (version 3.3)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] VS Code (version 1.28.2)
[✓] Connected device (1 available)

安装了Flutter和Dark插件，还是报下边的错误
✗ Flutter plugin not installed; this adds Flutter specific functionality.
✗ Dart plugin not installed; this adds Dart specific functionality.

我的解决办法是执行了一下

flutter doctor -v

报✗ Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses错误的话就执行一下
flutter doctor --android-licenses就好,确认一下协议，输入y确认下就行

2. 安装iOS toolchain

这个比较简单，按照提示步骤一步一步来

[!] 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

在这个过程中我安装libimobiledevice的时候报了下边这个错误,解决办法是执行 pod setup，然后多试几次，多试几次！！！

Cloning into '/Users/mac/Library/Caches/Homebrew/libimobiledevice--git'...
error: RPC failed; curl 18 transfer closed with outstanding read data remaining
fatal: The remote end hung up unexpectedly
fatal: early EOF
fatal: index-pack failed

最后再执行 flutter doctor 输出以下信息，说明全部安装完毕，恭喜~

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, v1.2.1, on Mac OS X 10.14.2 18C54, locale zh-Hans-CN)
[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[✓] iOS toolchain - develop for iOS devices (Xcode 10.1)
[✓] Android Studio (version 3.3)
[✓] VS Code (version 1.28.2)
[✓] Connected device (1 available)

• No issues found!