在Page.dart中制作了一个由6个页面组成的PageView。每个页面都有一个文本小部件，每个页面都包含一个动物名：依次为老虎，狮子，猴子，马，鸡和狗。我在main.dart中做了3个按钮。我只希望当我按下第一个按钮时，我进入页面[0]（老虎页面），当我按下第二个按钮时，我进入页面[2]（猴子页面），当我按下第三按钮时，我进入了到第[4]页（鸡页面）。但是我完全不知道。我认为必须有某种方法可以解决此问题，但我找不到它。
我搜索了它，并在此网站中对其进行了搜索，但找不到。
import 'package:flutter/material.dart';
List<String> animal = ['tiger', 'lion', 'monkey', 'horse', 'chicken', 'dog'];
class Chapter extends StatefulWidget {
@override
_ChapterState createState() => _ChapterState();
}
class _ChapterState extends State<Chapter> {
// int currentPage;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Chapter Page'),
),
body: PageView.builder(
itemCount: animal.length,
itemBuilder: (context, index) {
return Center(child: Text('${animal[index]} page'));
},
));
}
}
一些参考文献会很好。 预先谢谢你。
答案 0 :(得分：1)
您可以使用页面控制器Page Controller实现此目的。检查下面的代码，我在点击页面3上添加了一个导航按钮
Main.dart类
import 'package:flutter/material.dart';
import 'package:flutter_demo_app/chapter_demo.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: HomeScreen(),
);
}
}
class HomeScreen extends StatefulWidget {
HomeScreen({Key key}) : super(key: key);
@override
_HomeScreenState createState() {
return _HomeScreenState();
}
}
class _HomeScreenState extends State<HomeScreen> {
@override
void initState() {
super.initState();
}
@override
void dispose() {
super.dispose();
}
@override
Widget build(BuildContext context) {
// TODO: implement build
return Scaffold(
appBar: AppBar(
title: Text('Page View Demo'),
),
body: Center(
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
RaisedButton(
onPressed: () {
gotoSelectedPage(1);
},
child: Text('GO TO Page 1'),
),
RaisedButton(
onPressed: () {
gotoSelectedPage(2);
},
child: Text('GO TO Page 2'),
),
RaisedButton(
onPressed: () {
gotoSelectedPage(3);
},
child: Text('GO TO Page 3'),
),
RaisedButton(
onPressed: () {
gotoSelectedPage(4);
},
child: Text('GO TO Page 4'),
)
],
),
),
);
}
gotoSelectedPage(int selectedPage) {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Chapter(selectedPage),
),
);
}
}
Chapter.dart类
import 'package:flutter/material.dart';
List<String> animal = ['tiger', 'lion', 'monkey', 'horse', 'chicken', 'dog'];
class Chapter extends StatefulWidget {
final initialPage;
Chapter(this.initialPage);
@override
_ChapterState createState() => _ChapterState();
}
class _ChapterState extends State<Chapter> {
PageController _pageController;
@override
void initState() {
_pageController = PageController(initialPage: widget.initialPage);
super.initState();
}
@override
void dispose() {
_pageController.dispose();
super.dispose();
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Chapter Page'),
),
body: PageView.builder(
controller: _pageController,
itemCount: animal.length,
itemBuilder: (context, index) {
return Center(
child: Text('${animal[index]} page'),
);
},
),
);
}
}
答案 1 :(得分：1)
//Guys use both custumpage view and tab view
//hopefully it will give you help InshaAllah
//other wise whatsapp 03463480361 for hepl in code
//thanks
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
TabController _controller;
const activeColor = Colors.red;
const InactiveColor = Colors.grey;
enum Buttons {
Fix,
Custom,
}
const ktextHeadlineStyle =
TextStyle(fontWeight: FontWeight.bold, fontSize: 20, color: Colors.red);
const ktextSubHeadlineStyle =
TextStyle(fontSize: 15, fontWeight: FontWeight.bold, color: Colors.red);
const kTapTextStyle = TextStyle(color: Colors.white, fontSize: 20);
const kButtonTextStyle =
TextStyle(fontSize: 18, color: Colors.white, fontWeight: FontWeight.bold);
class SubCategoryScreen extends StatefulWidget {
@override
_SubCategoryScreenState createState() => _SubCategoryScreenState();
}
class _SubCategoryScreenState extends State<SubCategoryScreen>
with SingleTickerProviderStateMixin {
PageController pageController = PageController();
//TabController _controller=TabController(length: length, vsync: vsync);
@override
void initState() {
super.initState();
pageController = PageController(initialPage: 0);
_controller = new TabController(length: 3, vsync: this);
}
dispose() {
pageController.dispose();
_controller.dispose();
super.dispose();
}
Color fixedJobColor = activeColor;
Color customJobColor = InactiveColor;
Buttons selectedColor;
@override
Widget build(BuildContext context) {
return Scaffold(
body: ListView(
children: [
Container(
height: 200,
child: Stack(
children: [
Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.only(
bottomLeft: Radius.circular(33),
bottomRight: Radius.circular(33)),
image: DecorationImage(
image: NetworkImage('https://st.depositphotos.com/1000291/3041/i/950/depositphotos_30414567-stock-photo-adult-electrician-engineer-worker.jpg'),
fit: BoxFit.fill)),
),
Align(
alignment: Alignment.bottomCenter,
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 30),
child: Container(
child: SizedBox(
height: 40,
child: TextField(
decoration: new InputDecoration(
filled: true,
fillColor: Colors.white,
prefixIcon: Icon(Icons.search),
focusedBorder: OutlineInputBorder(
// borderRadius: BorderRadius.circular(33),
borderSide: BorderSide(
color: Colors.greenAccent, width: 5.0),
),
enabledBorder: OutlineInputBorder(
borderSide:
BorderSide(color: Colors.black, width: 1),
),
hintText: 'Search in categories',
),
),
),
),
),
),
Row(
children: [
IconButton(
icon: Icon(
Icons.arrow_back_ios,
color: Colors.white,
),
onPressed: () {}),
SizedBox(
width: 80,
),
Text(
"Electrician",
style: ktextHeadlineStyle.copyWith(color: Colors.white),
),
],
)
],
),
),
SizedBox(
height: 30,
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
MaterialButton(
splashColor: Colors.red,
onPressed: () {
setState(() {
selectedColor = Buttons.Fix;
});
pageController.animateToPage(0,
duration: Duration(seconds: 1),
curve: Curves.easeOutSine);
},
child: Text('Fixed Jobs', style: kButtonTextStyle),
color: selectedColor==Buttons.Fix?activeColor:InactiveColor,
),
MaterialButton(
splashColor: Colors.red,
onPressed: () {
setState(() {
selectedColor = Buttons.Custom;
});
pageController.animateToPage(1,
duration: Duration(seconds: 1),
curve: Curves.easeOutSine);
},
child: Text('Custom Jobs', style: kButtonTextStyle),
color:selectedColor==Buttons.Custom?activeColor:InactiveColor,
),
],
),
Column(
children: [
Container(
height: MediaQuery.of(context).size.height * .4,
child: PageView(
controller: pageController,
onPageChanged: (index) {},
children: [
FixedJobs(),
CustomJobs(),
],
),
)
],
)
],
),
);
}
}
BoxDecoration kBoxDecoration() {
return BoxDecoration(
color: Colors.white,
borderRadius: BorderRadius.all(Radius.circular(10)),
boxShadow: [
BoxShadow(
color: Colors.grey.withOpacity(0.5),
spreadRadius: 5,
blurRadius: 7,
offset: Offset(0, 3), // changes position of shadow
),
],
);
}
class FixedJobs extends StatefulWidget {
@override
_FixedJobsState createState() => _FixedJobsState();
}
class _FixedJobsState extends State<FixedJobs> {
@override
Widget build(BuildContext context) {
return Padding(
padding: const EdgeInsets.symmetric(vertical: 20),
child: ListView(
scrollDirection: Axis.vertical,
children: [
Container(
decoration: kBoxDecoration(),
child: MaterialButton(
splashColor: Colors.red,
onPressed: () {
// pageController.animateToPage(0,
// duration: Duration(seconds: 1),
// curve: Curves.easeOutSine);
},
child: TabBar(
controller: _controller,
isScrollable: true,
indicatorSize: TabBarIndicatorSize.label,
indicatorColor: Colors.yellow,
indicatorWeight: 10.0,
indicator: BoxDecoration(color: Colors.red),
tabs: [
Text('Taps', style: kButtonTextStyle.copyWith(color: Colors.red)),
Text('Taps', style: kButtonTextStyle.copyWith(color: Colors.red)),
Text('Taps', style: kButtonTextStyle.copyWith(color: Colors.red)),
],
),
// child: Text('Taps',
// style: kButtonTextStyle.copyWith(color: Colors.red)),
// color: Colors.yellow,
),
),
Container(
height: 300,
child: TabBarView(
controller: _controller,
children:[
new Container(
color: Colors.yellow,
),
new Container(
color: Colors.orange,
),
new Container(
color: Colors.lightGreen,
),
],
),
),
// Column(
// children: [
// Padding(
// padding: const EdgeInsets.symmetric(vertical: 10),
// child: Container(
// color: Color(0XFF252C41),
// child: TabBar(
// isScrollable: true,
// // indicatorSize: TabBarIndicatorSize.label,
// indicatorColor: Colors.yellow,
// indicatorWeight: 10.0,
// indicator: BoxDecoration(color: Colors.red),
// controller: _controller,
// tabs: [
// new Tab(child: Text("Bio", style: kTapTextStyle)),
// new Tab(
// child: Text("Training Location",
// style: kTapTextStyle),
// ),
// new Tab(
// child: Text("Reviews", style: kTapTextStyle)),
// new Tab(
// child: Text("Reviewed", style: kTapTextStyle)),
// ],
// ),
// ),
// ),
// Container(
// height: MediaQuery.of(context).size.height + 300,
// width: MediaQuery.of(context).size.width,
// child: TabBarView(
// controller: _controller,
// children: [
// new Card(
// child: Column(
// crossAxisAlignment: CrossAxisAlignment.start,
// children: [
// Text(
// "James White",
// style: ktextHeadlineStyle,
// ),
// Padding(
// padding:
// const EdgeInsets.symmetric(vertical: 20),
// child: Text(
// "Football",
// style: ktextHeadlineStyle,
// ),
// ),
// Text(
// "When developing an application, I had the need for a TabBar with buttons as Tabs. After searching around, I didn’t find anything; the default TabBar widget didn’t have that option, therefore, I decided to make it myself.",
// style: ktextSubHeadlineStyle,
// ),
// SizedBox(
// height: 80,
// ),
// // Center(
// // child: EditBottons(
// // onPressed: () {},
// // )),
// ],
// )),
// new Card(
// child: Padding(
// padding: const EdgeInsets.symmetric(horizontal: 15),
// child: Column(
// crossAxisAlignment: CrossAxisAlignment.start,
// children: [
// Padding(
// padding:
// const EdgeInsets.symmetric(vertical: 10),
// child: Text("Enter Your Name"),
// ),
// SizedBox(
// height: 30,
// child: TextField(
// decoration: InputDecoration(
// filled: true,
// fillColor: Color(0XFFE0E0E0),
// border: OutlineInputBorder(
// borderRadius:
// BorderRadius.circular(33),
// )),
// ),
// ),
// //SizedBox(height: 20,),
// // Row(
// // children: [
// // TextFieldBottumLine(
// // onChanged: null,
// // name: "Street Address",
// // ),
// // TextFieldBottumLine(
// // onChanged: null,
// // name: "City",
// // ),
// // TextFieldBottumLine(
// // onChanged: null,
// // name: "State",
// // ),
// // ],
// // ),
// // Row(
// // children: [
// // TextFieldBottumLine(
// // onChanged: null,
// // name: "Zip Code",
// // ),
// // TextFieldBottumLine(
// // onChanged: null,
// // name: "City",
// // ),
// // ],
// // ),
// SizedBox(
// height: 30,
// ),
// Padding(
// padding: const EdgeInsets.only(left: 240),
// child: Container(
// decoration: BoxDecoration(
// color: Colors.red,
// borderRadius: BorderRadius.circular(22),
// ),
// height: 40,
// width: 100,
// child: MaterialButton(
// onPressed: () {},
// child: Text(
// "Save",
// style: ktextSubHeadlineStyle.copyWith(
// color: Colors.white),
// ),
// ),
// ),
// ),
// SizedBox(
// height: 20,
// ),
// Text(
// 'Location',
// style: ktextSubHeadlineStyle,
// ),
// SizedBox(
// height: 20,
// ),
// RaisedButton(
// shape: RoundedRectangleBorder(
// borderRadius: BorderRadius.circular(18.0),
// side: BorderSide.none),
// onPressed: () {},
// color: Colors.grey,
// elevation: 20,
// textColor: Colors.white,
// child: Row(
// mainAxisAlignment:
// MainAxisAlignment.spaceBetween,
// children: <Widget>[
// Icon(Icons.location_on),
// Text(
// 'New York NY United States',
// style: ktextSubHeadlineStyle.copyWith(
// color: Colors.black),
// ),
// Icon(Icons.delete)
// ],
// ),
// ),
// RaisedButton(
// shape: RoundedRectangleBorder(
// borderRadius: BorderRadius.circular(18.0),
// side: BorderSide.none),
// onPressed: () {},
// color: Colors.grey,
// elevation: 20,
// textColor: Colors.white,
// child: Row(
// mainAxisAlignment:
// MainAxisAlignment.spaceBetween,
// children: <Widget>[
// Icon(Icons.location_on),
// Text(
// 'New York NY United States',
// style: ktextSubHeadlineStyle.copyWith(
// color: Colors.black),
// ),
// Icon(Icons.delete)
// ],
// ),
// ),
// SizedBox(
// height: 50,
// ),
// // Center(
// // child: EditBottons(
// // onPressed: () {},
// // ))
// ],
// ),
// )),
// new Card(
// child: ListView(children: [
// ListTile(
// leading: Container(
// height: 50,
// width: 50,
// decoration: BoxDecoration(
// image: DecorationImage(
// image: AssetImage('assets/pic.jpg'),
// fit: BoxFit.fill)),
// ),
// title: Text("Jane Pin"),
// subtitle: Text(
// 'ajfideifheihafdifdf difidhafa dfd af d faf difidhafdhf d f hfiahfdhif '),
// ),
// ListTile(
// leading: Container(
// height: 50,
// width: 50,
// decoration: BoxDecoration(
// image: DecorationImage(
// image: AssetImage('assets/pic.jpg'),
// fit: BoxFit.fill)),
// ),
// title: Text("Jane Pin"),
// subtitle: Text(
// 'ajfideifheihafdifdf difidhafa dfd af d faf difidhafdhf d f hfiahfdhif '),
// ),
// ListTile(
// leading: Container(
// height: 50,
// width: 50,
// decoration: BoxDecoration(
// image: DecorationImage(
// image: AssetImage('assets/pic.jpg'),
// fit: BoxFit.fill)),
// ),
// title: Text("Jane Pin"),
// subtitle: Text(
// 'ajfideifheihafdifdf difidhafa dfd af d faf difidhafdhf d f hfiahfdhif '),
// ),
// ListTile(
// leading: Container(
// height: 50,
// width: 50,
// decoration: BoxDecoration(
// image: DecorationImage(
// image: AssetImage('assets/pic.jpg'),
// fit: BoxFit.fill)),
// ),
// title: Text("Jane Pin"),
// subtitle: Text(
// 'ajfideifheihafdifdf difidhafa dfd af d faf difidhafdhf d f hfiahfdhif '),
// ),
// ]),
// ),
// new Card(
// child: new ListTile(
// leading: const Icon(Icons.location_on),
// title: new Text(
// 'Latitude: 48.09342\nLongitude: 11.23403'),
// trailing: new IconButton(
// icon: const Icon(Icons.my_location),
// onPressed: () {}),
// ),
// ),
// ],
// ),
// )
// ],
// ),
],
),
);
}
}
class CustomJobs extends StatefulWidget {
@override
_CustomJobsState createState() => _CustomJobsState();
}
class _CustomJobsState extends State<CustomJobs> {
@override
Widget build(BuildContext context) {
return Padding(
padding: const EdgeInsets.all(30),
child: Container(
height: MediaQuery.of(context).size.height,
decoration: kBoxDecoration(),
child: Column(
children: [
Expanded(
child: Row(
// mainAxisAlignment: MainAxisAlignment.start,
children: [
Expanded(
child: Icon(
Icons.account_circle,
size: 40,
)),
Expanded(
child: Padding(
padding: const EdgeInsets.only(right: 20),
child: Text(
"Please describe the work thatyou need. Our professionalwill contact you"),
),
),
],
),
),
Padding(
padding: const EdgeInsets.symmetric(vertical: 20),
child: Container(
child: Material(
// elevation: 5,
child: Padding(
padding: const EdgeInsets.symmetric(
horizontal: 30.0, vertical: 10),
child: SizedBox(
width: 350.0,
height: 100.0,
child: TextField(
// controller: notification,
style: TextStyle(fontSize: 20.0),
maxLines: 10,
decoration: InputDecoration(
fillColor: Colors.white,
filled: true,
border: OutlineInputBorder(
borderSide: BorderSide(width: 2)),
hintText: 'Enter Your Text',
),
),
),
),
)),
),
],
),
),
);
}
}
答案 2 :(得分：1)
我认为您正在寻找这个：
_pageController.nextPage(
duration: Duration(milliseconds: 1000),
curve: Curves.easeIn
);