main.dart
//导入了Material UI组件库 ,快捷操作fim
import 'package:flutter/material.dart';
import 'routes/Routes.dart';
void main() {
runApp(MyApp());
}
//自定义组件
//StatelessWidget:无状态组件,状态不可变的widget
//StatefulWidget:有状态组件,状态可以改变
//fluter中一切都是组件
//使用MaterialApp和Scaffold 两个组件装饰App
//MaterialApp一般作为根组件----home、title、color、theme、routes等
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
initialRoute: '/', //初始化的时候加载的路由
onGenerateRoute: onGenerateRoute
);
}
}
Routes.dart
import 'package:flutter/material.dart';
import '../pages/Tabs.dart';
import '../pages/Form.dart';
import '../pages/Search.dart';//配置路由
final routes={
'/':(context)=>Tabs(),
'/form':(context,{arguments})=>FormPage(arguments:arguments),
'/search':(context,{arguments})=>SearchPage(arguments:arguments),
};
//固定写法
var onGenerateRoute=(RouteSettings settings) {
// 统一处理
final String name = settings.name;
final Function pageContentBuilder = routes[name];
if (pageContentBuilder != null) {
if (settings.arguments != null) {
final Route route = MaterialPageRoute(
builder: (context) =>
pageContentBuilder(context, arguments: settings.arguments));
return route;
}else{
final Route route = MaterialPageRoute(
builder: (context) =>
pageContentBuilder(context));
return route;
}
}
};
Tabs.dart
import 'package:flutter/material.dart';
import 'tabs/Home.dart';
import 'tabs/Category.dart';
import 'tabs/Setting.dart';
import 'tabs/Mine.dart';
class Tabs extends StatefulWidget {
Tabs({Key key}) : super(key: key);
_TabsState createState() => _TabsState();
}
class _TabsState extends State {
int _currentIndex = 0;
List list = [HomePage(), CategoryPage(), SettingPage(), MinePage(),];
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Flutter Demo"),
),
body: this.list[this._currentIndex],
bottomNavigationBar: BottomNavigationBar(
//默认选中位置
currentIndex: this._currentIndex,
//item 点击回调
onTap: (int index) {
setState(() {
this._currentIndex = index;
});
},
items: [
BottomNavigationBarItem(icon: Icon(Icons.home), title: Text("首页")),
BottomNavigationBarItem(icon: Icon(Icons.category), title: Text("分类")),
BottomNavigationBarItem(icon: Icon(Icons.settings), title: Text("设置")),
BottomNavigationBarItem(icon: Icon(Icons.mail), title: Text("我的")),
],
//图标大小
iconSize: 26,
//选中颜色
fixedColor: Colors.red,
//配置底部按钮多于3个
type: BottomNavigationBarType.fixed,
),
);
}
}
Form.dart
import 'package:flutter/material.dart';
class FormPage extends StatelessWidget {
final arguments;
FormPage({this.arguments});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("表单页面"),
),
body: Text("表单页面内容区域${arguments != null ? arguments['id'] : '0'}"),
);
}
}
Search.dart
import 'package:flutter/material.dart';
class SearchPage extends StatelessWidget {
final arguments;
SearchPage({this.arguments});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("搜索页面"),
),
body: Text("搜页面内容区域${arguments != null ? arguments['ceshi'] : '0'}"),
);
}
}
Home.dart
import 'package:flutter/material.dart';
class HomePage extends StatefulWidget {
HomePage({Key key}) : super(key: key);
_HomePageState createState() => _HomePageState();
}
class _HomePageState extends State {
@override
Widget build(BuildContext context) {
return Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
RaisedButton(
child: Text("跳转到搜索界面传值"),
onPressed: () {
//路由跳转
Navigator.pushNamed(context, '/search', arguments: {"ceshi": 123});
},
color: Theme.of(context).accentColor,
textTheme: ButtonTextTheme.primary,
),
SizedBox(
height: 20,
),
],
);
}
}
Category.dart
import 'package:flutter/material.dart';
class CategoryPage extends StatefulWidget {
CategoryPage({Key key}) : super(key: key);
_CategoryPageState createState() => _CategoryPageState();
}
class _CategoryPageState extends State {
@override
Widget build(BuildContext context) {
return Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
RaisedButton(
child: Text("跳转到表单界面并传值"),
onPressed: () {
//路由跳转
Navigator.pushNamed(context, '/form', arguments: {"id": 123});
},
color: Theme.of(context).accentColor,
textTheme: ButtonTextTheme.primary,
),
],
);
}
}
Setting.dart
import 'package:flutter/material.dart';
class SettingPage extends StatefulWidget {
SettingPage({Key key}) : super(key: key);
_SettingPageState createState() => _SettingPageState();
}
class _SettingPageState extends State {
@override
Widget build(BuildContext context) {
return Center(
child: Text("设置",style: TextStyle(
fontSize: 20,
color: Colors.red
),),
);
}
}
Mine.dart
import 'package:flutter/material.dart';
class MinePage extends StatefulWidget {
MinePage({Key key}) : super(key: key);
_MinePageState createState() => _MinePageState();
}
class _MinePageState extends State {
@override
Widget build(BuildContext context) {
return Center(
child: Text("我的",style: TextStyle(
fontSize: 20,
color: Colors.red
),),
);
}
}