Make Function parameter optional in custom widget flutter

Deepak Biltoria answered on March 5, 2022 Popularity 9/10 Helpfulness 2/10

answer Make Function parameter optional in custom widget flutter

Make Function parameter optional in custom widget flutter

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class TextInputWithIcon extends StatefulWidget {
  final String iconPath;
  final String placeHolder;
  final Function(bool)? onFocusChange; // nullable and optional
  
  const TextInputWithIcon(
      {Key? key,
      required this.iconPath, // non-nullable and required
      this.placeHolder = "", // non-nullable but optional with a default value
      this.onFocusChange, // nullable and optional
      })
      : super(key: key);

  @override
  _TextInputWithIconState createState() => _TextInputWithIconState();

}

Popularity 9/10 Helpfulness 2/10 Language whatever

Source: stackoverflow.com

Tags: flutter function-parameter whatever widget

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