如何创建一个有界的可滚动的TabBarView

时间:2018-12-12 16:16:41

标签: flutter widget flutter-layout flutter-sliver

我需要在Flutter中实现以下布局。

Layout

当用户滚动时,我希望整个布局都滚动(隐藏标题和标签栏)。但是,我无法将TabBarView嵌套在ListView中,因为TabBarView没有限制的高度,并且ListViews并未为其子代提供限制的高度。

我已经看过这些问题,但是对于此用例,所有问题的答案都不令人满意:

3 个答案:

答案 0 :(得分:5)

enter image description here

class SliverWithTabBar extends StatefulWidget {
  @override
  _SliverWithTabBarState createState() => _SliverWithTabBarState();
}

class _SliverWithTabBarState extends State<SliverWithTabBar> with SingleTickerProviderStateMixin {
  TabController controller;

  @override
  void initState() {
    super.initState();
    controller = TabController(length: 3, vsync: this);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: NestedScrollView(
        headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
          return [
            SliverAppBar(
              pinned: false,
              backgroundColor: Colors.white,
              flexibleSpace: FlexibleSpaceBar(
                collapseMode: CollapseMode.pin,
                background: Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: <Widget>[
                    Container(
                      height: 200.0,
                      width: double.infinity,
                      color: Colors.grey,
                      child: FlutterLogo(),
                    ),
                    Padding(
                      padding: const EdgeInsets.all(10.0),
                      child: Text(
                        'Business Office',
                        style: TextStyle(fontSize: 25.0),
                        textAlign: TextAlign.left,
                      ),
                    ),
                    Padding(
                      padding: const EdgeInsets.all(10.0),
                      child: Text(
                        'Open now\nStreet Address, 299\nCity, State',
                        style: TextStyle(fontSize: 15.0),
                        textAlign: TextAlign.left,
                      ),
                    ),
                    Padding(
                      padding: const EdgeInsets.only(right: 10.0),
                      child: Row(
                        mainAxisAlignment: MainAxisAlignment.end,
                        children: <Widget>[
                          Icon(Icons.share),
                          Padding(
                            padding: const EdgeInsets.only(left: 10.0),
                            child: Icon(Icons.favorite),
                          ),
                        ],
                      ),
                    )
                  ],
                ),
              ),
              expandedHeight: 380.0,
              bottom: TabBar(
                indicatorColor: Colors.black,
                labelColor: Colors.black,
                tabs: [
                  Tab(text: 'POSTS'),
                  Tab(text: 'DETAILS'),
                  Tab(text: 'FOLLOWERS'),
                ],
                controller: controller,
              ),
            )
          ];
        },
        body: ListView.builder(
          itemCount: 100,
          itemBuilder: (BuildContext context, int index) {
            return Card(
              color: index % 2 == 0 ? Colors.blue : Colors.green,
              child: Container(
                alignment: Alignment.center,
                width: double.infinity,
                height: 100.0,
                child: Text(
                  'Flutter is awesome',
                  style: TextStyle(fontSize: 18.0),
                ),
              ),
            );
          },
        ),
      ),
    );
  }
}

您应该寻找Sliver小部件来实现NestedScrollView

这为您提供了一个 headerSliv​​erBuilder 属性,您可以在其中实际放置一些标题,这些标题可能会在滚动小部件时隐藏或固定在屏幕顶部,在此特定示例中,{{ 1}}。

您可能想看一下RenderSliver文档。

答案 1 :(得分:0)

在Miguel Ruvio的回答之上,用TabBarView替换正文中的ListView可以使您几乎按照D.R.的注释进行操作。当我的其中一个小部件包装在一个列中时,确实遇到了一些溢出问题。为此用ListView替换 example

import 'package:flutter/material.dart';

void main() {
  runApp(MaterialApp(home: Tabs()));
}

class Tabs extends StatefulWidget {
  @override
  _RoomTabsState createState() => _RoomTabsState();
}

class _RoomTabsState extends State<Tabs> with TickerProviderStateMixin {
  var _scrollViewController;
  var _tabController;

  @override
  void initState() {
    super.initState();
    _scrollViewController = ScrollController();
    _tabController = TabController(vsync: this, length: 2);
  }

  @override
  Widget build(BuildContext context) {
    return NestedScrollView(
      controller: _scrollViewController,
      headerSliverBuilder: (context, bool) => [
        SliverAppBar(
          bottom: TabBar(
            controller: _tabController,
            tabs: [
              Tab(text: "All"),
              Tab(text: "Living room"),
            ],
          ),
        ),
      ],
      body: TabBarView(
        controller: _tabController,
        children: [
          ListView(children: [
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
            Text("test"),
          ]),
          Text("test"),
        ],
      ),
    );
  }
}

来自此github issue

答案 2 :(得分:0)

请尝试以下代码:

 NestedScrollView(
  headerSliverBuilder: (context, value) {
    return [
      SliverToBoxAdapter(
          child: Header()
      ),
      SliverToBoxAdapter(
        child: TabBar(
          controller: _controller,
          tabs: [
            Tab(icon: Icon(Icons.x)),
            Tab(icon: Icon(Icons.y)),
            Tab(icon: Icon(Icons.z)),
          ],
        ),
      ),
    ];
  },
body: Container(
  child: TabBarView(
    controller: _controller,
    children: <Widget>[
      page1(),
      page2(),
      page3(),
    ],
  ),
),

)