flutter - 如何在 Flutter 中创建页眉/页脚/主布局
问题描述
我正在努力在 Flutter 中创建附加布局。虽然我创建了一些可行的东西,但它确实很复杂且丑陋(代码方面)。我想要关于如何创建它的建议?
注意:我只希望使用标准布局(行/列/中心/等)创建它。我不希望使用像 BottomNavigationBar 这样的小部件。
解决方案
你可以这样做,(请阅读代码中的推荐)
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: HomePage(),
);
}
}
class HomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
//You should use `Scaffold` if you have `TextField` in body.
//Otherwise on focus your `TextField` won`t scroll when keyboard popup.
body: SafeArea(
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: <Widget>[
//Header Container
Container(
padding: const EdgeInsets.all(8.0),
color: Colors.blue,
alignment: Alignment.center,
child: Text("Header"),
),
//Body Container
Expanded(
child: SingleChildScrollView(
padding: const EdgeInsets.symmetric(horizontal: 30.0),
child: Column(
children: <Widget>[
Container(
color: Colors.red,
height: 200.0,
alignment: Alignment.center,
child: Text("Content 1"),
),
Container(
color: Colors.green,
height: 300.0,
alignment: Alignment.center,
child: Text("Content 1"),
),
//TextField nearly at bottom
TextField(
decoration: InputDecoration(hintText: "Enter Text Here"),
),
],
),
),
),
//Footer Container
//Here you will get unexpected behaviour when keyboard pops-up.
//So its better to use `bottomNavigationBar` to avoid this.
Container(
padding: const EdgeInsets.all(8.0),
color: Colors.blue,
alignment: Alignment.center,
child: Text("Footer"),
),
],
),
),
);
}
}