如何在Flutter中实现嵌套ListView? [英] How to implement Nested ListView in Flutter?

问题描述

实现嵌套ListView或换句话说，可以包含在可滚动父级中的ListView Widget的首选方法是什么?

What is the preferred way to achieve a nested ListView, or in other words, ListView Widgets that could be included within a scrollable parent?

想象一个报告"页面，其中一个部分是逐项列出的列表.

Imagine a "Reports" page, where a section is an itemized list.

推荐答案

如果要使内部ListView可独立于主滚动视图滚动，则应使用 CustomScrollView .

If you want to have the inner ListView be scrollable independently of the main scroll view, you should use NestedScrollView. Otherwise, use a CustomScrollView.

以下是说明NestedScrollView方法的代码.

Here is some code illustrating the NestedScrollView approach.

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      body: new NestedScrollView(
        headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {
          return <Widget>[
            new SliverAppBar(
              pinned: true,
              title: new Text('Flutter Demo'),
            ),
          ];
        },
        body: new Column(
          children: <Widget>[
            new FlutterLogo(size: 100.0, colors: Colors.purple),
            new Container(
              height: 300.0,
              child: new ListView.builder(
                itemCount: 60,
                itemBuilder: (BuildContext context, int index) {
                  return new Text('Item $index');
                },
              ),
            ),
            new FlutterLogo(size: 100.0, colors: Colors.orange),
          ],
        ),
      ),
    );
  }
}

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