flutter 安装 傻瓜式教程

//从git上clone

1、打开命令行窗口，输入以下命令
git clone -b beta https://github.com/flutter/flutter.git 

2、配置环境变量

2.1 sudo vi .bash_profile， 按i进入编辑模式，输入export PATH=`pwd`/flutter/bin:$PATH，并按ESC，再输入:wq， 保存退出

3、输入flutter doctor 检查安装缺失相，按提示，进行相应安装

若执行flutter doctor出现以下错误：

⣽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：

brew uninstall ideviceinstaller

brew uninstall libimobiledevice

brew install --HEAD libimobiledevice

brew link --overwrite libimobiledevice

brew install --HEAD ideviceinstaller

brew link --overwrite ideviceinstaller