The named parameter 'name' isn't defined-CodePudding

The named parameter 'name' isn't defined. Try correcting the name to an existing named parameter's name, or defining a named parameter with the name 'name'.

import 'package:flutter/material.dart';
import 'package:navigation/screen2.dart';

class Screenone extends StatelessWidget {
const Screenone({Key? key}) : super(key: key);

@override
Widget build(BuildContext context) {
return Scaffold(
  // navigation to next page.
  /*body: 
Column(children: [
    Text("Screen one"),
    ElevatedButton(
      
      onPressed: () {
        Navigator.of(context).push(
          MaterialPageRoute(
            builder: (ctx) {
              return Screentwo();
            },
          ),
        );
      },
      child: Text("Go to next page"),
    )
  ]),*/
  body: SafeArea(
    child: ListView.separated(
        itemBuilder: (context, index) {
          return ListTile(
            title: Text('person $index'),
            onTap: () {
              Navigator.of(context).push(
                MaterialPageRoute(
                  builder: (context) {
                    return Screentwo(name: 'person $index');
                  },
                ),
              );
            },
          );
        },
        separatorBuilder: ((context, index) {
          return Divider();
        }),
        itemCount: 20),
  ),
);

} }

CodePudding user response：

To be able to pass a parameter to from X page to Screentwo you must ask for a parameter from Screentwo in the first place;

class Screentwo extends StatelessWidget {
  final String name;
  const Screentwo({Key? key, required this.name}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    //return your widget
  }
}

CodePudding user response：

Pass the optional name parameter in ScreenTwo.


class ScreenTwo extends StatelessWidget {
  final String? name;
  const ScreenTwo({Key? key, this.name}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Text(name ?? ""),
    );
  }
}

Call Example:

return Screentwo(name: 'person name');

or 

return Screentwo();