【Flutter】Warning: CocoaPods not installed. Skipping pod installと言われた時の解消方法

概要

Android Studioを更新した後に、Flutterアプリを実行しようとして下記のエラーが出た時の解決方法です。

Warning: CocoaPods not installed. Skipping pod install.
  CocoaPods is used to retrieve the iOS and macOS platform side's plugin code that responds to your plugin usage on the Dart side.
  Without CocoaPods, plugins will not work on iOS or macOS.
  For more info, see https://flutter.dev/platform-plugins
To install see https://guides.cocoapods.org/using/getting-started.html#installation for instructions.

Exception: CocoaPods not installed or not in valid state.

解決方法

1. Android Studioを終了する

2. ターミナルで下記のコマンドを実行する

chmod +x /Applications/Android\ Studio.app/Contents/bin/printenv