如何将导航代码添加到颤动列表视图？

Question

我在下面的代码中插入导航链接时遇到问题。我想学习如何在第二个]中插入导航链接

onPressed: () {

// TODO（实现）。}

ListView窗口小部件：已批准，待处理等是应包含指向其他页面的链接的项目。通过单击FontAwesome.chevronRight

可以访问页面。

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

class AppTab2 extends StatefulWidget {
  @override
  _AppTab2State createState() => _AppTab2State();
}

class _AppTab2State extends State<AppTab2> {
  PageController _pageController = PageController(initialPage: 2);

  @override
  build(BuildContext context) {
    final Map<String, Widget> pages = <String, Widget>{
      'My Music': Center(
        child: Text('My Music not implemented'),
      ),
      'Shared': Center(
        child: Text('Shared not implemented'),
      ),
      'Feed': Feed(),
    };
    TextTheme textTheme = Theme.of(context).textTheme;
    return Stack(
      children: [
        Container(
          decoration: BoxDecoration(
              // Gradient color the background
              gradient: LinearGradient(
            begin: FractionalOffset.topCenter,
            end: FractionalOffset.bottomCenter,
            colors: [
              const Color.fromARGB(255, 253, 72, 72),
              const Color.fromARGB(255, 87, 97, 249),
            ],
            stops: [0.0, 1.0],
          )),
//          child: Align(
//            alignment: FractionalOffset.bottomCenter,
//            child: Container(
//              padding: const EdgeInsets.all(10.0),
//              child: Text(
//                'Demo',
//                style: textTheme.headline.copyWith(
//                  color: Colors.grey.shade800.withOpacity(0.8),
//                  fontWeight: FontWeight.bold,
//                ),
//              ),
//            ),
//          ),
        ),
        Scaffold(
          backgroundColor: Colors.white,
//          appBar: AppBar(
//            backgroundColor: const Color(0x00000000),
//            elevation: 0.0,
//            leading: Center(
//              child: ClipOval(
//                child: Image.network(
//                  'http://i.imgur.com/TtNPTe0.jpg',
//                ),
//              ),
//            ),
//            actions: [
//              IconButton(
//                icon: Icon(Icons.add),
//                onPressed: () {
//                  // TODO: implement
//                },
//              ),
//            ],
////            title: const Text('tofu\'s songs'),
//            bottom: CustomTabBar(
//              pageController: _pageController,
//              pageNames: pages.keys.toList(),
//            ),
//          ),
          body: PageView(
            controller: _pageController,
            children: pages.values.toList(),
          ),
        ),
      ],
    );
  }
}

class CustomTabBar extends AnimatedWidget implements PreferredSizeWidget {
  CustomTabBar({this.pageController, this.pageNames})
      : super(listenable: pageController);

  final PageController pageController;
  final List<String> pageNames;

  @override
  final Size preferredSize = Size(0.0, 40.0);

  @override
  Widget build(BuildContext context) {
    TextTheme textTheme = Theme.of(context).textTheme;
    return Container(
      height: 40.0,
      margin: const EdgeInsets.all(10.0),
      padding: const EdgeInsets.symmetric(horizontal: 20.0),
      decoration: BoxDecoration(
        color: Colors.grey.shade800.withOpacity(0.5),
        borderRadius: BorderRadius.circular(20.0),
      ),
      child: Row(
        mainAxisAlignment: MainAxisAlignment.spaceBetween,
        children: List.generate(pageNames.length, (int index) {
          return InkWell(
              child: Text(pageNames[index],
                  style: textTheme.subhead.copyWith(
                    fontSize: 30.0,
                    fontFamily: 'OpenSans',
                    color: Colors.white.withOpacity(
                      index == pageController.page ? 1.0 : 0.2,
                    ),
                  )),
              onTap: () {
                pageController.animateToPage(
                  index,
                  curve: Curves.easeOut,
                  duration: const Duration(milliseconds: 300),
                );
              });
        }),
      ),
    );
  }
}

class Feed extends StatefulWidget {
  @override
  _FeedState createState() => _FeedState();
}

class _FeedState extends State<Feed> {
  @override
  Widget build(BuildContext context) {
    return ListView(
      children: [
        Content(
          title: 'Approved',
        ),
        Content(
          title: 'Pending',
        ),
        Content(
          title: 'Published',
        ),
        Content(
          title: 'Withdrawn',
        ),
        Content(
          title: 'Declined',
        ),
        Content(
          title: 'Content Rights',
        ),
      ],
    );
  }
}

class Content extends StatefulWidget {
  const Content({
    this.title,
  });

  final String title;

  @override
  _ContentState createState() => _ContentState();
}

class _ContentState extends State<Content> {
  @override
  Widget build(BuildContext context) {
    TextTheme textTheme = Theme.of(context).textTheme;
    return Container(
        margin: const EdgeInsets.symmetric(horizontal: 10.0, vertical: 5.0),
        padding: const EdgeInsets.symmetric(horizontal: 15.0, vertical: 10.0),
        decoration: BoxDecoration(
          color: Colors.grey.shade300.withOpacity(0.5),
          borderRadius: BorderRadius.circular(5.0),
        ),
        child: IntrinsicHeight(
          child: Row(
            children: <Widget>[
//              Container(
//                margin:
//                    const EdgeInsets.only(top: 4.0, bottom: 4.0, right: 10.0),
//                child: CircleAvatar(
//                  backgroundImage: NetworkImage(
//                      'http://thecatapi.com/api/images/get?format=src'
//                      '&size=small&type=jpg#${title.hashCode}'),
//                  radius: 20.0,
//                ),
//              ),
              SizedBox(
                height: 15.0,
              ),
              Expanded(
                child: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  mainAxisAlignment: MainAxisAlignment.spaceEvenly,
                  children: <Widget>[
                    Text(widget.title, style: textTheme.subhead),
                  ],
                ),
              ),
              Container(
                margin: EdgeInsets.symmetric(horizontal: 5.0),
                child: InkWell(
                  child: Icon(
                    FontAwesomeIcons.chevronRight,
                    size: 25.0,
                    color: Colors.deepPurpleAccent,
                  ),
                  onTap: () {
                    // TODO(implement)
                  },
                ),
              ),
              Container(
                margin: EdgeInsets.symmetric(horizontal: 5.0),
                child: InkWell(
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: <Widget>[
//                      Icon(Icons.favorite, size: 25.0),
//                      Text('${likes ?? ''}'),
                    ],
                  ),
                  onTap: () {
                    // TODO(implement)
                  },
                ),
              ),
            ],
          ),
        ));
  }
}

我在下面的代码中插入导航链接时遇到问题。我想学习如何在第二个onPressed中插入导航链接：（）{// TODO（implement）。 } ListView ...

Answer 1

您的代码中有一些错误。为了演示，我修改了您的一些代码。您可以在下面看到完整的演示代码和图片