Dart 版本是 2.2.0，但我收到要求版本 >=2.2.0 的错误

Question

我有最新版本的 Flutter，我正在尝试运行官方的 Flutter 图库应用。当我做 dart --version 我得到

Dart VM version: 2.2.0 (Tue Feb 26 15:04:32 2019 +0100) on "macos_x64"

但是，当我尝试获取包裹时:

[flutter_gallery] flutter packages get
Running "flutter packages get" in flutter_gallery...            
The current Dart SDK version is 2.1.2-dev.0.0.flutter-0a7dcf17eb.

Because flutter_gallery requires SDK version >=2.2.0 <3.0.0, version solving failed.
pub get failed (1)
exit code 1

有趣的是，当我运行 flutter upgrade 时，它会列出旧版本的 Dart(工具)。

Upgrading Flutter from /Users/leejohnson/dev/flutter...
From https://github.com/flutter/flutter
   a1bee54fd..59ce7d6bf  dev        -> origin/dev
   55a2ee588..f8f2b043e  master     -> origin/master
 * [new tag]             v1.3.13    -> v1.3.13
Already up to date.

Upgrading engine...
Already up-to-date.

Flutter 1.2.1 • channel stable • https://github.com/flutter/flutter.git
Framework • revision 8661d8aecd (5 weeks ago) • 2019-02-14 19:19:53 -0800
Engine • revision 3757390fa4
Tools • Dart 2.1.2 (build 2.1.2-dev.0.0 0a7dcf17eb)

如果我正确理解了这个错误，Flutter 没有使用最新版本的 Dart，但官方 Flutter 示例应用程序需要它。我该如何解决这个问题？

Answer 1

dart --version 的输出与 Flutter 完全无关。你需要检查的是 flutter doctor -v 或 flutter --version。在您的情况下，它显示 Tools • Dart 2.1.2 (build 2.1.2-dev.0.0 0a7dcf17eb)

您可能需要切换到另一个 channel ，直到下一次稳定 channel 更新

flutter channel dev

或

flutter channel master