Flutter Drawer quando viene toccata l'icona del menu

Question

Attualmente sto provando il widget del cassetto. Ho costruito un'appbar con un'icona del menu di hamburger, testo del titolo e un'icona di ricerca. Ecco il mio codice: `

import 'package:flutter/material.dart';
import 'package:hexcolor/hexcolor.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  @override
  Widget build(BuildContext context) {
    return SafeArea(
        child: Scaffold(
            appBar: PreferredSize(
                child: Container(
                  color: Colors.white,
                  padding:
                      EdgeInsets.only(left: 10, right: 10, top: 10, bottom: 10),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: <Widget>[
                      Icon(Icons.menu),
                      Text(
                        'Appbar',
                        style: TextStyle(fontWeight: FontWeight.bold),
                      ),
                      Icon(Icons.search)
                    ],
                  ),
                ),
                preferredSize: Size.fromHeight(40)),
            backgroundColor: Hexcolor('#e9f1fe'),
            body: Center(
              child: Text('Experimenting drawer'),
            )));
  }
}

"

Ecco l'output:

,

Inoltre ho un file di freccette separato per un cassetto personalizzato che voglio essere visualizzato quando viene toccata l'icona del menu dell'hamburger. Come posso renderlo possibile?

Ecco il codice per il cassetto personalizzato:

    import 'package:flutter/material.dart';

class DrawerScreen extends StatefulWidget {
  @override
  _DrawerScreenState createState() => _DrawerScreenState();
}

class _DrawerScreenState extends State<DrawerScreen> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      drawer: Drawer(
          child: Column(
        children: [
          ListTile(
            leading: CircleAvatar(
              radius: 28,
              backgroundColor: Colors.blueGrey,
              child: CircleAvatar(
                radius: 50,
                backgroundImage: AssetImage('assets/images/joker.jpg'),
              ),
            ),
            title: Text(
              'Joaquin Phoenix',
              style: TextStyle(
                color: Colors.black,
                fontFamily: 'Roboto',
                fontWeight: FontWeight.bold,
                fontSize: 14,
              ),
            ),
            subtitle: Text(
              "You wouldn't get it",
              style: TextStyle(
                  color: Colors.black,
                  fontFamily: 'Roboto',
                  fontWeight: FontWeight.w400,
                  fontSize: 10.0),
            ),
          )
        ],
      )),
      backgroundColor: Colors.blue[50],
    );
  }
}

Answer 1

Puoi copiare e incollare eseguire due codici completi sotto
Passaggio 1: _DrawerScreenStaterimuovere Scaffold
Passaggio 2: Per il drawercolore di sfondo, puoi avvolgere conTheme

class _DrawerScreenState extends State<DrawerScreen> {
  @override
  Widget build(BuildContext context) {
    return Theme(
      data: Theme.of(context).copyWith(
        canvasColor: Colors.blue[50],
      ),
      child: Drawer(

Passaggio 3: utilizzare DrawerScreen()inmain.dart

SafeArea(
    child: Scaffold(
        drawer: DrawerScreen(),

Fase 4: involucro Icons.menucon Buildere aperto conopenDrawer()

Builder(
        builder: (context) => GestureDetector(
            onTap: () {
              Scaffold.of(context).openDrawer();
            },
            child: Icon(Icons.menu)),
      ),

demo funzionante

codice completo main.dart

import 'package:flutter/material.dart';
import 'package:hexcolor/hexcolor.dart';
import 'drawer.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  @override
  Widget build(BuildContext context) {
    return SafeArea(
        child: Scaffold(
            drawer: DrawerScreen(),
            appBar: PreferredSize(
                child: Container(
                  color: Colors.white,
                  padding:
                      EdgeInsets.only(left: 10, right: 10, top: 10, bottom: 10),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: <Widget>[
                      Builder(
                        builder: (context) => GestureDetector(
                            onTap: () {
                              Scaffold.of(context).openDrawer();
                            },
                            child: Icon(Icons.menu)),
                      ),
                      Text(
                        'Appbar',
                        style: TextStyle(fontWeight: FontWeight.bold),
                      ),
                      Icon(Icons.search)
                    ],
                  ),
                ),
                preferredSize: Size.fromHeight(40)),
            backgroundColor: Hexcolor('#e9f1fe'),
            body: Center(
              child: Text('Experimenting drawer'),
            )));
  }
}

codice completo drawer.dart

import 'package:flutter/material.dart';

class DrawerScreen extends StatefulWidget {
  @override
  _DrawerScreenState createState() => _DrawerScreenState();
}

class _DrawerScreenState extends State<DrawerScreen> {
  @override
  Widget build(BuildContext context) {
    return Theme(
      data: Theme.of(context).copyWith(
        canvasColor: Colors.blue[50],
      ),
      child: Drawer(
          child: Column(
            children: [
              ListTile(
                leading: CircleAvatar(
                  radius: 28,
                  backgroundColor: Colors.blueGrey,
                  child: CircleAvatar(
                    radius: 50,
                    backgroundImage: AssetImage('assets/images/joker.jpg'),
                  ),
                ),
                title: Text(
                  'Joaquin Phoenix',
                  style: TextStyle(
                    color: Colors.black,
                    fontFamily: 'Roboto',
                    fontWeight: FontWeight.bold,
                    fontSize: 14,
                  ),
                ),
                subtitle: Text(
                  "You wouldn't get it",
                  style: TextStyle(
                      color: Colors.black,
                      fontFamily: 'Roboto',
                      fontWeight: FontWeight.w400,
                      fontSize: 10.0),
                ),
              )
            ],
          )),
    );
  }
}