Flutter で iOS / Android 向けに合わせた AlertDialog を愚直に出し分けるだけのメモ

get_alert_dialog.dart

// 使い方
// showDialog(context: context, child: this._getAlertDialog());
Widget _getAlertDialog() {
  var title = new Text("AlertDialog");
  var listBody = new ListBody(
    children: [
      new Text("AlertDialog body text."),
    ],
  );
  var androidAction = new FlatButton(
    child: new Text('Regret'),
    onPressed: () => Navigator.of(context).pop(),
  );
  var iOSAction = new CupertinoButton(
    child: new Text('Regret'),
    onPressed: () => Navigator.of(context).pop(),
  );

  return Theme.of(context).platform == TargetPlatform.iOS
      ? new CupertinoAlertDialog(
          title: title,
          content: new SingleChildScrollView(
            child: listBody,
          ),
          actions: <Widget>[iOSAction],
        )
      : new AlertDialog(
          title: title,
          content: new SingleChildScrollView(
            child: listBody,
          ),
          actions: <Widget>[androidAction],
        );
}