Mac上Flutter开发环境搭建

1. 安装Dart SDK

brew tap dart-lang/dart
brew install dart

2. 配置VSCode
   安装Dart、Code Runner插件
3. 下载Flutter SDK
4. 解压Flutter SDK压缩包到目标路径
5. 配置flutter的PATH环境变量
   比如我的，在.zshrc文件中增加下面一行：

export PATH="$PATH:/Users/wlm/workspace/development/flutter/bin"

通过下面两个命令验证PATH环境变量是否添加成功：

echo $PATH
which flutter

6. 通过命令行创建一个Flutter应用

flutter create my_app

7. 启动应用

cd my_app
flutter run

报错：

Multiple devices found:
macOS (desktop) • macos  • darwin-x64     • macOS 12.1 21C52 darwin-x64
Chrome (web)    • chrome • web-javascript • Google Chrome 108.0.5359.124
[1]: macOS (macos)
[2]: Chrome (chrome)
Please choose one (To quit, press "q/Q"): 1
Launching lib/main.dart on macOS in debug mode...
ProcessException: Process exited abnormally:
xcrun: error: unable to find utility "xcodebuild", not a developer tool or in PATH
  Command: xcrun xcodebuild -list -project Runner.xcodeproj

这是因为Mac电脑没有Xcode，安装后再次运行，出现下面的提示：

Building flutter tool...
Multiple devices found:
macOS (desktop) • macos  • darwin-x64     • macOS 12.1 21C52 darwin-x64
Chrome (web)    • chrome • web-javascript • Google Chrome 108.0.5359.124
[1]: macOS (macos)
[2]: Chrome (chrome)
Please choose one (To quit, press "q/Q"): 1
Running "flutter pub get" in my_app...                             505ms
Launching lib/main.dart on macOS in debug mode...
Building macOS application...
Syncing files to device macOS...                                   152ms

Flutter run key commands.
r Hot reload. 
R Hot restart.
h List all available interactive commands.
d Detach (terminate "flutter run" but leave application running).
c Clear the screen
q Quit (terminate the application on the device).

 Running with sound null safety 

An Observatory debugger and profiler on macOS is available at: http://127.0.0.1:53719/92xA0GO6XBc=/
The Flutter DevTools debugger and profiler on macOS is available at:
http://127.0.0.1:9101?uri=http://127.0.0.1:53719/92xA0GO6XBc=/
Lost connection to device.

界面运行起来如下：