Flutterにて『The argument type ‘IconData’ can’t be assigned to the parameter type ‘Widget’.』が出た時の解決法

環境

macOS Big Sur Version 11.5.2

Flutter 2.2.3

XCode 12.5.1

問題

The argument type 'IconData' can't be assigned to the parameter type 'Widget'.

Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        actions: <Widget>[
          IconButton(
            onPressed: onPressed,
            icon: Icons.access_alarm,
          )
        ],
        title: Text('Hello Todo'),
      ),
    );
  }

解決方法

IconData型をIcon型にWidget型に変換できるようにラップしてあげる必要がある。

icon: Icon(Icons.access_alarm),

AppBar class - material library - Dart API

API docs for the AppBar class from the material library, for the Dart programming language.

api.flutter.dev