如何使tabview在flutter中位于另一个tabview中?
我试图通过以下方式创建嵌套的选项卡栏视图:从外部选项卡视图返回包含另一个选项卡视图的列,但是它只显示一个空白屏幕,而不是第二个选项卡视图。我怎样才能解决这个问题如何使tabview在flutter中位于另一个tabview中?,flutter,Flutter,我试图通过以下方式创建嵌套的选项卡栏视图:从外部选项卡视图返回包含另一个选项卡视图的列,但是它只显示一个空白屏幕,而不是第二个选项卡视图。我怎样才能解决这个问题 class MyApp extends StatelessWidget { @override Widget build(BuildContext context) { return MaterialApp( title: 'Flutter Demo', theme: ThemeData(
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: DefaultTabController(length: 2, child: MyHomePage(title: '')),
);
}
}
class MyHomePage extends StatelessWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
Widget build(BuildContext context){
final view = LayoutBuilder(builder: (context, constraints){
//created a widget here with content
});
return Scaffold(
appBar: AppBar(
title: Text('Tab bar view'), bottom: TabBar(
tabs: [
Tab(icon: Icon(Icons.directions_car)),
Tab(icon: Icon(Icons.directions_transit)),
]),
),
body: TabBarView(children: [DefaultTabController(length: 2, child: Column(
children: <Widget>[TabBar(tabs: [Tab(text: 'Home'),Tab(text: 'News')
, Container(child: TabBarView(
children: <Widget>[ view, Icon(Icons.access_alarms)],
))])]
) ), Icon(Icons.directions_car)]));
}
}
类MyApp扩展了无状态小部件{
@凌驾
小部件构建(构建上下文){
返回材料PP(
标题:“颤振演示”,
主题:主题数据(
主样本:颜色。蓝色,
),
主页:DefaultTabController(长度:2,子项:MyHomePage(标题:''),
);
}
}
类MyHomePage扩展了无状态小部件{
MyHomePage({Key,this.title}):超级(Key:Key);
最后的字符串标题;
@凌驾
小部件构建(构建上下文){
最终视图=布局生成器(生成器:(上下文、约束){
//在这里创建了一个包含内容的小部件
});
返回脚手架(
appBar:appBar(
标题:文本(“选项卡栏视图”),底部:选项卡栏(
选项卡:[
选项卡(图标:图标(图标方向车)),
选项卡(图标:图标(图标方向和交通)),
]),
),
正文:TabBarView(子项:[DefaultTabController(长度:2,子项:列(
子项:[选项卡栏(选项卡:[选项卡(文本:“主页”),选项卡(文本:“新闻”)
,容器(子项:TabBarView(
子项:[视图,图标(图标.访问\u报警)],
))])]
))、图标(Icons.directions\u car)]);
}
}
导入“包装:颤振/材料.飞镖”;
类Locationstat扩展StatefulWidget{
@凌驾
_LocationstatState createState()=>\u LocationstatState();
}
类_LocationstatState扩展状态
使用SingleTickerProviderStateMixin{
TabController\u TabController;
@凌驾
void initState(){
super.initState();
_tabController=新的tabController(长度:2,vsync:this);
}
@凌驾
无效处置(){
super.dispose();
_tabController.dispose();
}
@凌驾
小部件构建(构建上下文){
返回脚手架(
appBar:appBar(
背景颜色:Colors.white,
海拔:0,
标题:文本(“统计数据”),
底部:选项卡栏(
控制器:\ tab控制器,
指示颜色:颜色。橙色,
labelColor:Colors.orange,
未选择的标签颜色:Colors.black 54,
选项卡:[
标签(
正文:('Pokhara Lekhnath'),
),
标签(
正文:(‘博卡拉莱赫纳特以外’),
),
]),
),
正文:选项卡视图(
儿童:[
NestedTabar(),
NestedTabar(),
],
控制器:\ tab控制器,
),
);
}
}
类NestedTabar扩展StatefulWidget{
@凌驾
_NestedTabBarState createState()=>_NestedTabBarState();
}
类_NestedTabBarState扩展状态
使用TickerProviderStateMixin{
TabController _nestedTabController;
@凌驾
void initState(){
super.initState();
_nestedTabController=新的TabController(长度:2,vsync:this);
}
@凌驾
无效处置(){
super.dispose();
_nestedTabController.dispose();
}
@凌驾
小部件构建(构建上下文){
double screenHeight=MediaQuery.of(context).size.height;
返回列(
mainAxisAlignment:mainAxisAlignment.spaceAround,
儿童:[
塔巴(
控制器:_nestedTabController,
指示颜色:颜色。橙色,
labelColor:Colors.orange,
未选择的标签颜色:Colors.black 54,
isScrollable:是的,
选项卡:[
标签(
文字:“博卡拉内部”,
),
标签(
文字:“博卡拉外”,
),
],
),
容器(
高度:屏幕高度*0.70,
边距:仅限边集(左:16.0,右:16.0),
子项:选项卡视图(
控制器:_nestedTabController,
儿童:[
容器(
装饰:盒子装饰(
边界半径:边界半径。圆形(8.0),
颜色:颜色。蓝灰色[300],
),
),
容器(
装饰:盒子装饰(
边界半径:边界半径。圆形(8.0),
颜色:颜色。蓝灰色[300],
),
),
],
),
)
],
);
}
}
就像在谷歌Play商店一样,这是最好的方法
import 'package:flutter/material.dart';
class Locationstat extends StatefulWidget {
@override
_LocationstatState createState() => _LocationstatState();
}
class _LocationstatState extends State<Locationstat>
with SingleTickerProviderStateMixin {
TabController _tabController;
@override
void initState() {
super.initState();
_tabController = new TabController(length: 2, vsync: this);
}
@override
void dispose() {
super.dispose();
_tabController.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.white,
elevation: 0,
title: Text('Statistics'),
bottom: TabBar(
controller: _tabController,
indicatorColor: Colors.orange,
labelColor: Colors.orange,
unselectedLabelColor: Colors.black54,
tabs: <Widget>[
Tab(
text:('Pokhara Lekhnath'),
),
Tab(
text:('Outside Pokhara-Lekhnath'),
),
]),
),
body: TabBarView(
children: <Widget>[
NestedTabBar(),
NestedTabBar(),
],
controller: _tabController,
),
);
}
}
class NestedTabBar extends StatefulWidget {
@override
_NestedTabBarState createState() => _NestedTabBarState();
}
class _NestedTabBarState extends State<NestedTabBar>
with TickerProviderStateMixin {
TabController _nestedTabController;
@override
void initState() {
super.initState();
_nestedTabController = new TabController(length: 2, vsync: this);
}
@override
void dispose() {
super.dispose();
_nestedTabController.dispose();
}
@override
Widget build(BuildContext context) {
double screenHeight = MediaQuery.of(context).size.height;
return Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
TabBar(
controller: _nestedTabController,
indicatorColor: Colors.orange,
labelColor: Colors.orange,
unselectedLabelColor: Colors.black54,
isScrollable: true,
tabs: <Widget>[
Tab(
text: "Inside Pokhara",
),
Tab(
text: "Outside Pokhara",
),
],
),
Container(
height: screenHeight * 0.70,
margin: EdgeInsets.only(left: 16.0, right: 16.0),
child: TabBarView(
controller: _nestedTabController,
children: <Widget>[
Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(8.0),
color: Colors.blueGrey[300],
),
),
Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(8.0),
color: Colors.blueGrey[300],
),
),
],
),
)
],
);
}
}
导入“包装:颤振/材料.省道”;
类Locationstat扩展StatefulWidget{
@凌驾
_LocationstatState createState()=>\u LocationstatState();
}
类_LocationstatState扩展状态
使用SingleTickerProviderStateMixin{
TabController\u TabController;
@凌驾
void initState(){
super.initState();
_tabController=新的tabController(长度:2,vsync:this);
}
@凌驾
无效处置(){
super.dispose();
_tabController.dispose();
}
@凌驾
小部件构建(构建上下文){
返回脚手架(
appBar:appBar(
背景颜色:Colors.white,
海拔:0,
标题:文本(“统计数据”),
底部:选项卡栏(
控制器:\ tab控制器,
指示颜色:颜色。橙色,
labelColor:Colors.orange,
未选择的标签颜色:Colors.black 54,
选项卡:[
标签(
正文:('Pokhara Lekhnath'),
),
标签(
正文:(‘博卡拉莱赫纳特以外’),
),
]),
),
正文:选项卡视图(
儿童:[
NestedTabar(),
NestedTabar(),
],
控制器:\ tab控制器,
),
);
}
}
类NestedTabar扩展StatefulWidget{
@凌驾
_NestedTabBarState createState()=>_NestedTabBarState();
}
类_NestedTabBarState扩展状态
使用TickerProviderStateMixin{
TabController _nestedTabController;
@凌驾
vo
import 'package:flutter/material.dart';
class Locationstat extends StatefulWidget {
@override
_LocationstatState createState() => _LocationstatState();
}
class _LocationstatState extends State<Locationstat>
with SingleTickerProviderStateMixin {
TabController _tabController;
@override
void initState() {
super.initState();
_tabController = new TabController(length: 2, vsync: this);
}
@override
void dispose() {
super.dispose();
_tabController.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.white,
elevation: 0,
title: Text('Statistics'),
bottom: TabBar(
controller: _tabController,
indicatorColor: Colors.orange,
labelColor: Colors.orange,
unselectedLabelColor: Colors.black54,
tabs: <Widget>[
Tab(
text:('Pokhara Lekhnath'),
),
Tab(
text:('Outside Pokhara-Lekhnath'),
),
]),
),
body: TabBarView(
children: <Widget>[
NestedTabBar(),
NestedTabBar(),
],
controller: _tabController,
),
);
}
}
class NestedTabBar extends StatefulWidget {
@override
_NestedTabBarState createState() => _NestedTabBarState();
}
class _NestedTabBarState extends State<NestedTabBar>
with TickerProviderStateMixin {
TabController _nestedTabController;
@override
void initState() {
super.initState();
_nestedTabController = new TabController(length: 2, vsync: this);
}
@override
void dispose() {
super.dispose();
_nestedTabController.dispose();
}
@override
Widget build(BuildContext context) {
double screenHeight = MediaQuery.of(context).size.height;
return Column(
mainAxisAlignment: MainAxisAlignment.spaceAround,
children: <Widget>[
TabBar(
controller: _nestedTabController,
indicatorColor: Colors.orange,
labelColor: Colors.orange,
unselectedLabelColor: Colors.black54,
isScrollable: true,
tabs: <Widget>[
Tab(
text: "Inside Pokhara",
),
Tab(
text: "Outside Pokhara",
),
],
),
Container(
height: screenHeight * 0.70,
margin: EdgeInsets.only(left: 16.0, right: 16.0),
child: TabBarView(
controller: _nestedTabController,
children: <Widget>[
Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(8.0),
color: Colors.blueGrey[300],
),
),
Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(8.0),
color: Colors.blueGrey[300],
),
),
],
),
)
],
);
}
}