本文介绍了如何在 Flutter 中实现嵌套的 ListView?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
实现嵌套 ListView 的首选方法是什么,或者换句话说,可以包含在可滚动父级中的 ListView 小部件是什么?
想象一个报告"页面,其中一个部分是一个逐项列表.
解决方案
如果你想让内部 ListView 独立于主滚动视图滚动,你应该使用
import 'package:flutter/material.dart';无效主(){运行应用程序(新的我的应用程序());}class MyApp 扩展 StatelessWidget {@覆盖小部件构建(BuildContext 上下文){返回新的 MaterialApp(title: 'Flutter 演示',主题:新主题数据(主色板:Colors.blue,),主页:新的我的主页(),);}}class MyHomePage 扩展了 StatelessWidget {@覆盖小部件构建(BuildContext 上下文){返回新的脚手架(正文:新的 NestedScrollView(headerSliverBuilder: (BuildContext context, bool innerBoxIsScrolled) {返回 [新的 SliverAppBar(固定:真实,标题:新文本('颤振演示'),),];},正文:新列(孩子们:<小部件>[新的 FlutterLogo(大小:100.0,颜色:Colors.purple),新容器(高度:300.0,孩子:新的 ListView.builder(itemCount: 60,itemBuilder:(BuildContext 上下文,int 索引){return new Text('Item $index');},),),新的 FlutterLogo(大小:100.0,颜色:Colors.orange),],),),);}}
What is the preferred way to achieve a nested ListView, or in other words, ListView Widgets that could be included within a scrollable parent?
Imagine a "Reports" page, where a section is an itemized list.
解决方案
If you want to have the inner ListView be scrollable independently of the main scroll view, you should use NestedScrollView
. Otherwise, use a CustomScrollView
.
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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