Cannot find runner for main.dartの解決法

Question

前提・実現したいこと

Flutterでiosアプリを作ろうと思っています。
Android StdioでFlutterのRunを実行した結果、エラーが出たのですが解決法が分からず困っています。

エラーメッセージ

Error running 'main.dart': Cannot find runner for main.dart

試したこと

flutter doctor -vの実行し、以下のメッセージを受けました。
一見すると問題ないと思っています。

$ flutter doctor -v
Warning! This package referenced a Flutter repository via the .packages file that is no longer
available. The repository from which the 'flutter' tool is currently executing will be used
instead.
  running Flutter tool: /Users/tsudashouki/flutter
  previous reference  : /Users/tsudashouki/Desktop/st_namer/flutter
This can happen if you deleted or moved your copy of the Flutter repository, or if it was on a
volume that is no longer mounted or has been mounted at a different location. Please check your
system path to verify that you are running the expected version (run 'flutter --version' to see
which flutter is on your path).


[✓] Flutter (Channel stable, v1.9.1+hotfix.6, on Mac OS X 10.15 19A602, locale ja-JP)
    • Flutter version 1.9.1+hotfix.6 at /Users/tsudashouki/flutter
    • Framework revision 68587a0916 (8 weeks ago), 2019-09-13 19:46:58 -0700
    • Engine revision b863200c37
    • Dart version 2.5.0

 
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
    • Android SDK at /Users/tsudashouki/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-29, build-tools 29.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
    • All Android licenses accepted.

[✓] Xcode - develop for iOS and macOS (Xcode 11.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 11.1, Build version 11A1027
    • CocoaPods version 1.8.3

[✓] Android Studio (version 3.5)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 41.0.2
    • Dart plugin version 191.8593
    • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)

[✓] Connected device (1 available)
    • iPhone 8 • 368DC565-91C0-482F-AB24-C69A3F868B0F • ios •
      com.apple.CoreSimulator.SimRuntime.iOS-13-1 (simulator)

• No issues found!

Answer 1

Android StudioのFlutterとDartのSDKのパス設定が足りていないからかもしれません。以下の設定が適切にされているか確認してみてください。

Preferences > Languages and Frameworks > Dart > Dart SDK path
Preferences > Languages and Frameworks > Flutter > Flutter SDK path

同じエラーが本家のイシュー にありました