11

我正在遵循Flutter 入门flutter指南并在运行实际命令时卡住：

flutter init -o my_app
Resolving dependencies...
Error on line 17, column 16 of pubspec.yaml: Invalid version constraint: Could not parse version "^1.4.0". Unknown text at "^1.4.0".
  stack_trace: ^1.4.0
               ^^^^^^
Unhandled exception:
Uncaught Error: FileSystemException: Cannot open file, path = '/Users/craig/Code/flutter/packages/flutter_tools/packages/sky_tools/executable.dart' (OS Error: No such file or directory, errno = 2)
Stack Trace:
#0      _File.open.<anonymous closure> (dart:io/file_impl.dart:349)
#1      _RootZone.runUnary (dart:async/zone.dart:1151)
#2      _Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:496)
#3      _Future._propagateToListeners (dart:async/future_impl.dart:579)
#4      _Future._completeWithValue (dart:async/future_impl.dart:339)
#5      _Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:401)
#6      _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:41)
#7      _asyncRunCallback (dart:async/schedule_microtask.dart:48)
#8      _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:84)
#9      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:131)

#0      _rootHandleUncaughtError.<anonymous closure> (dart:async/zone.dart:883)
#1      _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:41)
#2      _asyncRunCallback (dart:async/schedule_microtask.dart:48)
#3      _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:84)
#4      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:131)
Unhandled exception:
Uncaught Error: FileSystemException: Cannot open file, path = '/Users/craig/Code/flutter/bin/cache/flutter_tools.snapshot' (OS Error: No such file or directory, errno = 2)
Stack Trace:
#0      _File.open.<anonymous closure> (dart:io/file_impl.dart:349)
#1      _RootZone.runUnary (dart:async/zone.dart:1151)
#2      _Future._propagateToListeners.handleValueCallback (dart:async/future_impl.dart:496)
#3      _Future._propagateToListeners (dart:async/future_impl.dart:579)
#4      _Future._completeWithValue (dart:async/future_impl.dart:339)
#5      _Future._asyncComplete.<anonymous closure> (dart:async/future_impl.dart:401)
#6      _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:41)
#7      _asyncRunCallback (dart:async/schedule_microtask.dart:48)
#8      _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:84)
#9      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:131)

#0      _rootHandleUncaughtError.<anonymous closure> (dart:async/zone.dart:883)
#1      _asyncRunCallbackLoop (dart:async/schedule_microtask.dart:41)
#2      _asyncRunCallback (dart:async/schedule_microtask.dart:48)
#3      _runPendingImmediateCallback (dart:isolate-patch/isolate_patch.dart:84)
#4      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:131)
4

4 回答 4

23

看起来你的 Dart 版本已经过时了< 1.9.2。
尝试dart --version获取已安装的 Dart SDK 的版本。
当前为1.12.x。

2018-03-20 更新

在迁移到 Dart 2 的阶段，您可能希望从dev频道安装 Dart 以获得 2.0.0-alpha.x 版本。最新的稳定版本是 1.24.x

例如

brew install dart --devel

2018-06-21 更新

现在还支持：

brew install dart@2
于 2015-11-10T13:36:43.130 回答
6

对于遇到类似错误的其他人，我建议您仔细阅读文档。我没有，因此我浪费了很多时间在其他地方寻找解决方案，即使它一直就在我的眼前：https ://flutter.io/setup-macos/#update-your-path

我正在写下命令，以便您可以轻松地将它们复制并粘贴到终端窗口中：

touch $HOME/.bash_profile
open $HOME/.bash_profile

第 1 行创建一个名为.bash_profile. 第 2 行打开它。

然后必须将下面给出的行粘贴到文本文件中：

export PATH=[PATH_TO_FLUTTER_GIT_DIRECTORY]/flutter/bin:$PATH

粘贴后不要忘记保存文件。flutter doctor现在应该适用于每个终端窗口。

于 2018-03-22T12:02:11.143 回答
2

打开你的终端并运行它

export PATH=[PATH_TO_FLUTTER_GIT_DIRECTORY]/flutter/bin:$PATH

然后运行​​flutter，它会工作。

于 2018-06-29T18:38:37.937 回答
1

这是因为您设置的路径是临时的。添加路径

export PATH=[PATH_TO_FLUTTER_GIT_DIRECTORY]/flutter/bin:$PATH

[PATH_TO_FLUTTER_GIT_DIRECTORY] -> 下载 Flutter 或从 git 克隆的文件夹。

然后做

echo $PATH

观看此视频以轻松安装 https://www.youtube.com/watch?v=Em8igImhBKc

于 2018-07-04T07:26:44.690 回答