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Flutter开发环境搭建
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配置国内镜像

打开mac的终端，按顺序执行以下命令：

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export PUB_HOSTED_URL=https://pub.flutter-io.cn
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn

或者直接添加为环境变量：

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vi $HOME/.bash_profile

//之后往文件写入以下内容
export PUB_HOSTED_URL=https://pub.flutter-io.cn
export FLUTTER_STORAGE_BASE_URL=https://storage.flutter-io.cn

注意，如果你使用了梯子并设置好了代理的话随意，这步可有可无。

Flutter SDK安装

可以到这下载Flutter SDK安装包（如果你所在的网络环境下得动的话）：https://flutter.io/sdk-archive/#macos

如果下不动可以直接到github项目去release记录里下载：https://github.com/flutter/flutter/releases

下载完成后可以使用unzip命令解压文件，以下载到flutter目录，文件名flutter-0.10.0.zip为例：

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cd ~/flutter
unzip flutter-0.10.0..zip

或者直接图形化界面解压。

又或者直接clone稳定的master分支：

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git clone -b master https://github.com/flutter/flutter.git

之后配置环境变量：

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vi $HOME/.bash_profile

//之后往文件写入以下内容
export PATH=你存放flutterSDK的路径/flutter/bin:$PATH

执行flutter doctor

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flutter doctor

这个命令会检查依赖项是否已经安装完整。

比如我电脑诊断结果如下：

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Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel master, v0.10.1-pre.77, on Mac OS X 10.14 18A391, locale en-CN)
[!] Android toolchain - develop for Android devices (Android SDK 28.0.3)
    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses
[!] iOS toolchain - develop for iOS devices (Xcode 10.0)
    ✗ 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 3.2)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[!] IntelliJ IDEA Ultimate Edition (version 2018.1.4)
    ✗ Flutter plugin not installed; this adds Flutter specific functionality.
    ✗ Dart plugin not installed; this adds Dart specific functionality.
[✓] Connected device (1 available)

那么只需要按照打叉的项目一个个解决就可以了。

因为我同时安装了Android Studio及IntelliJ IDEA，所以后面的IntelliJ IDEA那一项warning是可以忽视的，使用Android Studio就可以了。

安装iOS开发依赖项

如果不打算打包ios版本，可以跳过这一步。

上面flutter doctor已经列出我们需要完成的东西，依次安装以下依赖：

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brew install --HEAD libimobiledevice
brew install ideviceinstaller
brew install ios-deploy

安装libimobiledevice过程中可能会报以下错误：

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configure: error: Package requirements (libusbmuxd >= 1.1.0) were not met:

Requested 'libusbmuxd >= 1.1.0' but version of libusbmuxd is 1.0.10

Consider adjusting the PKG_CONFIG_PATH environment variable if you
installed software in a non-standard prefix.

Alternatively, you may set the environment variables libusbmuxd_CFLAGS
and libusbmuxd_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

READ THIS: https://docs.brew.sh/Troubleshooting

这个时候可以通过依次执行以下命令来解决：

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brew update
brew uninstall --ignore-dependencies libimobiledevice
brew uninstall --ignore-dependencies usbmuxd
brew install --HEAD usbmuxd
brew unlink usbmuxd
brew link usbmuxd
brew install --HEAD libimobiledevice

另外在你安装完所有依赖执行flutter doctor检查的时候可能报以下错误：

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⣽Unhandled exception:
Exception: idevice_id returned an error:

#0      IMobileDevice.getInfoForDevice (package:flutter_tools/src/ios/mac.dart:122:9)
<asynchronous suspension>
#1      IOSDevice.getAttachedDevices (package:flutter_tools/src/ios/devices.dart:152:53)
<asynchronous suspension>
#2      IOSDevices.pollingGetDevices (package:flutter_tools/src/ios/devices.dart:112:57)
#3      PollingDeviceDiscovery.devices (package:flutter_tools/src/device.dart:163:52)
<asynchronous suspension>
#4      DeviceManager.getAllConnectedDevices (package:flutter_tools/src/device.dart:91:46)
<asynchronous suspension>
#5      DeviceValidator.validate (package:flutter_tools/src/doctor.dart:677:54)
<asynchronous suspension>
#6      Doctor.startValidatorTasks (package:flutter_tools/src/doctor.dart:107:52)
#7      Doctor.diagnose (package:flutter_tools/src/doctor.dart:174:41)
#8      _AsyncAwaitCompleter.start (dart:async/runtime/libasync_patch.dart:49:6)
#9      Doctor.diagnose (package:flutter_tools/src/doctor.dart:164:24)
#10     DoctorCommand.runCommand (package:flutter_tools/src/commands/doctor.dart:29:39)
#11     _AsyncAwaitCompleter.start (dart:async/runtime/libasync_patch.dart:49:6)
#12     DoctorCommand.runCommand (package:flutter_tools/src/commands/doctor.dart:28:42)
#13     FlutterCommand.verifyThenRunCommand (package:flutter_tools/src/runner/flutter_command.dart:383:18)
#14     _asyncThenWrapperHelper.<anonymous closure> (dart:async/runtime/libasync_patch.dart:77:64)
#15     _rootRunUnary (dart:async/zone.dart:1132:38)
#16     _CustomZone.runUnary (dart:async/zone.dart:1029:19)
#17     _FutureListener.handleValue (dart:async/future_impl.dart:129:18)
#18     Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:642:45)
#19     Future._propagateToListeners (dart:async/future_impl.dart:671:32)
#20     Future._complete (dart:async/future_impl.dart:476:7)
#21     _SyncCompleter.complete (dart:async/future_impl.dart:51:12)
#22     _AsyncAwaitCompleter.complete.<anonymous closure> (dart:async/runtime/libasync_patch.dart:33:20)
#23     _rootRun (dart:async/zone.dart:1124:13)
#24     _CustomZone.run (dart:async/zone.dart:1021:19)
#25     _CustomZone.bindCallback.<anonymous closure> (dart:async/zone.dart:947:23)
#26     _microtaskLoop (dart:async/schedule_microtask.dart:41:21)
#27     _startMicrotaskLoop (dart:async/schedule_microtask.dart:50:5)
#28     _runPendingImmediateCallback (dart:isolate/runtime/libisolate_patch.dart:115:13)
#29     _RawReceivePortImpl._handleMessage (dart:isolate/runtime/libisolate_patch.dart:172:5)

此时可以依次执行以下命令解决：

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brew uninstall ideviceinstaller
brew uninstall libimobiledevice
brew install --HEAD libimobiledevice
brew link --overwrite libimobiledevice
brew install --HEAD ideviceinstaller
brew link --overwrite ideviceinstaller
sudo rm -rf /var/db/lockdown/*

之后连接ios设备选择“信任”后，执行以下命令：

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sudo chmod -R 777 /var/db/lockdown/

安装Android开发依赖项

Android版本可以使用Android Studio或IntelliJ IDEA，这里以Android Studio为例。

打开“Android Studio”-“Preferences”-“Plugins”,搜索“Flutter”关键字，安装，途中会询问是否安装“Dark”，选择“是”。

注意，如果下载不动，可能你需要设置一下代理。

抑或从网上下载安装包在Android studio里面以文件形式导入安装。

本文只是作为本人安装过程记录。

准备就绪

最后执行一次flutter doctor，显示如下：

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Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel master, v0.10.1-pre.77, on Mac OS X 10.14 18A391, locale en-CN)
[✓] Android toolchain - develop for Android devices (Android SDK 28.0.3)
[✓] iOS toolchain - develop for iOS devices (Xcode 10.0)
[✓] Android Studio (version 3.2)
[✓] Connected device (1 available)

证明环境检查通过，已经准备就绪。

文章作者: Kevin Wu
文章链接: https://kevinwu.cn/p/5ed7ef7d/
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