Flutter 如何从搜索结果导航到新页面
我正在尝试查找有关搜索导航的信息,但找不到任何合适的教程,说明如何在搜索后导航到特定页面。我希望有人能解释我是如何做到这一点的 搜索“谷歌”后,我想按下它,并通过导航重定向到一个新页面Flutter 如何从搜索结果导航到新页面,flutter,search,navigation,delegates,Flutter,Search,Navigation,Delegates,我正在尝试查找有关搜索导航的信息,但找不到任何合适的教程,说明如何在搜索后导航到特定页面。我希望有人能解释我是如何做到这一点的 搜索“谷歌”后,我想按下它,并通过导航重定向到一个新页面 import 'package:flutter/material.dart'; class SearchPage extends StatefulWidget { @override _SearchPageState createState() => _SearchPageState(); }
import 'package:flutter/material.dart';
class SearchPage extends StatefulWidget {
@override
_SearchPageState createState() => _SearchPageState();
}
class _SearchPageState extends State<SearchPage> {
Widget appBarTitle = Text(
"Search",
style: TextStyle(color: Colors.white),
);
Icon actionIcon = Icon(
Icons.search,
color: Colors.white,
);
final key = GlobalKey<ScaffoldState>();
final TextEditingController _searchQuery = TextEditingController();
List<String> _list;
bool _isSearching;
String _searchText = "";
_SearchPageState() {
_searchQuery.addListener(() {
if (_searchQuery.text.isEmpty) {
setState(() {
_isSearching = false;
_searchText = "";
});
} else {
setState(() {
_isSearching = true;
_searchText = _searchQuery.text;
});
}
});
}
@override
void initState() {
super.initState();
_isSearching = false;
initData();
}
void initData() {
_list = List();
_list.add("google");
_list.add("IOS");
_list.add("Android");
_list.add("Linux");
_list.add("MacOS");
_list.add("Windows");
}
@override
Widget build(BuildContext context) {
return new Scaffold(
key: key,
appBar: buildBar(context),
body: new ListView(
padding: new EdgeInsets.symmetric(vertical: 8.0),
children: _isSearching ? _buildSearchList() : _buildList(),
),
);
}
List<ChildItem> _buildList() {
return _list.map((contact) => new ChildItem(contact)).toList();
}
List<ChildItem> _buildSearchList() {
if (_searchText.isEmpty) {
return _list.map((contact) => new ChildItem(contact))
.toList();
}
else {
List<String> _searchList = List();
for (int i = 0; i < _list.length; i++) {
String name = _list.elementAt(i);
if (name.toLowerCase().contains(_searchText.toLowerCase())) {
_searchList.add(name);
}
}
return _searchList.map((contact) => new ChildItem(contact))
.toList();
}
}
Widget buildBar(BuildContext context) {
return new AppBar(
centerTitle: true,
title: appBarTitle,
actions: <Widget>[
new IconButton(icon: actionIcon, onPressed: () {
setState(() {
if (this.actionIcon.icon == Icons.search) {
this.actionIcon = new Icon(Icons.close, color: Colors.white,);
this.appBarTitle = new TextField(
controller: _searchQuery,
style: new TextStyle(
color: Colors.white,
),
decoration: new InputDecoration(
prefixIcon: new Icon(Icons.search, color: Colors.white),
hintText: "search...",
hintStyle: new TextStyle(color: Colors.white)
),
);
_handleSearchStart();
}
else {
_handleSearchEnd();
}
});
},),
]
);
}
void _handleSearchStart() {
setState(() {
_isSearching = true;
});
}
void _handleSearchEnd() {
setState(() {
this.actionIcon = new Icon(Icons.search, color: Colors.white,);
this.appBarTitle =
new Text("search", style: new TextStyle(color: Colors.white),);
_isSearching = false;
_searchQuery.clear();
});
}
}
class ChildItem extends StatelessWidget {
final String name;
ChildItem(this.name);
@override
Widget build(BuildContext context) {
return new ListTile(title: new Text(this.name));
}
}
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: HomePage(),
);
}
}
class HomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Search Example"),
actions: [
IconButton(
icon: Icon(Icons.search),
onPressed: () {
showSearch(context: context, delegate: SearchItem());
}),
],
),
);
}
}
final List<String> myList = [
"google",
"IOS",
"Android",
"Linux",
"MacOS",
"Windows"
];
class SearchItem extends SearchDelegate<String> {
@override
List<Widget> buildActions(BuildContext context) {
return [
IconButton(
icon: Icon(Icons.clear),
onPressed: () {
query = "";
})
];
}
@override
Widget buildLeading(BuildContext context) {
return IconButton(
icon: AnimatedIcon(
icon: AnimatedIcons.menu_arrow,
progress: transitionAnimation,
),
onPressed: () {
close(context, null);
});
}
@override
Widget buildResults(BuildContext context) {}
@override
Widget buildSuggestions(BuildContext context) {
final suggestionsList = query.isEmpty
? myList
: myList
.where((p) => p.toLowerCase().contains(query.toLowerCase()))
.toList();
return ListView.builder(
itemBuilder: (context, index) => ListTile(
onTap: () {
close(context, suggestionsList[index]);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => DetailScreen(myList
.indexWhere((item) => item == suggestionsList[index]))));
},
title: Text(suggestionsList[index]),
),
itemCount: suggestionsList.length,
);
}
}
class DetailScreen extends StatelessWidget {
final int index;
DetailScreen(this.index);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text("${myList[index]}"),),
body: Center(
child: Text(
"${myList[index]}",style: TextStyle(fontSize: 22),
),
));
}
}
导入“包装:颤振/材料.省道”;
类SearchPage扩展StatefulWidget{
@凌驾
_SearchPageState createState()=>\u SearchPageState();
}
类_SearchPageState扩展状态{
Widget appBarTitle=文本(
“搜索”,
样式:TextStyle(颜色:Colors.white),
);
图标动作图标=图标(
Icons.search,
颜色:颜色,白色,
);
final key=GlobalKey();
final TextEditingController_searchQuery=TextEditingController();
列表(u List),;
布尔乌正在研究;
字符串_searchText=“”;
_SearchPageState(){
_searchQuery.addListener((){
if(_searchQuery.text.isEmpty){
设置状态(){
_isSearching=假;
_searchText=“”;
});
}否则{
设置状态(){
_isSearching=true;
_searchText=\u searchQuery.text;
});
}
});
}
@凌驾
void initState(){
super.initState();
_isSearching=假;
initData();
}
void initData(){
_list=list();
_添加(“谷歌”);
_列表。添加(“IOS”);
_添加(“安卓”);
_添加(“Linux”);
_列表。添加(“MacOS”);
_列表。添加(“窗口”);
}
@凌驾
小部件构建(构建上下文){
归还新脚手架(
钥匙:钥匙,
appBar:buildBar(上下文),
正文:新列表视图(
填充:新边集。对称(垂直:8.0),
子项:_isSearching?_buildSearchList():_buildList(),
),
);
}
列表_buildList(){
return _list.map((contact)=>newchilditem(contact)).toList();
}
列表_buildSearchList(){
if(_searchText.isEmpty){
return _list.map((contact)=>newchildItem(contact))
.toList();
}
否则{
List _searchList=List();
对于(int i=0;i<\u list.length;i++){
字符串名称=_list.elementAt(i);
if(name.toLowerCase()包含(_searchText.toLowerCase()){
_搜索列表。添加(名称);
}
}
return _searchList.map((contact)=>newchildItem(contact))
.toList();
}
}
小部件构建栏(构建上下文){
返回新的AppBar(
标题:对,
标题:appBarTitle,
行动:[
新图标按钮(图标:操作图标,按下按钮:(){
设置状态(){
if(this.actionIcon.icon==Icons.search){
this.actionIcon=新图标(Icons.close,颜色:Colors.white,);
this.appBarTitle=新文本字段(
控制器:\u searchQuery,
样式:新文本样式(
颜色:颜色,白色,
),
装饰:新的输入装饰(
前缀图标:新图标(Icons.search,颜色:Colors.white),
hintText:“搜索…”,
hintStyle:新文本样式(颜色:Colors.white)
),
);
_handleSearchStart();
}
否则{
_handleSearchEnd();
}
});
},),
]
);
}
void_handleSearchStart(){
设置状态(){
_isSearching=true;
});
}
void_handleSearchEnd(){
设置状态(){
this.actionIcon=新图标(Icons.search,颜色:Colors.white,);
这个是appBarTitle=
新文本(“搜索”,样式:新文本样式(颜色:Colors.white),);
_isSearching=假;
_searchQuery.clear();
});
}
}
类ChildItem扩展了无状态小部件{
最后的字符串名;
ChildItem(此名称);
@凌驾
小部件构建(构建上下文){
返回新的ListTile(标题:新文本(this.name));
}
}
您也可以使用SearchDelegate
执行此操作
在构建建议
下进行查询和导航
@override
Widget buildSuggestions(BuildContext context) {
final suggestionsList = query.isEmpty
? myList
: myList
.where((p) => p.toLowerCase().contains(query.toLowerCase()))
.toList();
return ListView.builder(
itemBuilder: (context, index) => ListTile(
onTap: () {
close(context, suggestionsList[index]);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => DetailScreen(myList
.indexWhere((item) => item == suggestionsList[index]))));
},
title: Text(suggestionsList[index]),
),
itemCount: suggestionsList.length,
);
}
正在将列表的索引
与suggestionList索引
配对:
MaterialPageRoute(
builder: (context) => DetailScreen(myList
.indexWhere((item) => item == suggestionsList[index])))
下面是所有导航代码
import 'package:flutter/material.dart';
class SearchPage extends StatefulWidget {
@override
_SearchPageState createState() => _SearchPageState();
}
class _SearchPageState extends State<SearchPage> {
Widget appBarTitle = Text(
"Search",
style: TextStyle(color: Colors.white),
);
Icon actionIcon = Icon(
Icons.search,
color: Colors.white,
);
final key = GlobalKey<ScaffoldState>();
final TextEditingController _searchQuery = TextEditingController();
List<String> _list;
bool _isSearching;
String _searchText = "";
_SearchPageState() {
_searchQuery.addListener(() {
if (_searchQuery.text.isEmpty) {
setState(() {
_isSearching = false;
_searchText = "";
});
} else {
setState(() {
_isSearching = true;
_searchText = _searchQuery.text;
});
}
});
}
@override
void initState() {
super.initState();
_isSearching = false;
initData();
}
void initData() {
_list = List();
_list.add("google");
_list.add("IOS");
_list.add("Android");
_list.add("Linux");
_list.add("MacOS");
_list.add("Windows");
}
@override
Widget build(BuildContext context) {
return new Scaffold(
key: key,
appBar: buildBar(context),
body: new ListView(
padding: new EdgeInsets.symmetric(vertical: 8.0),
children: _isSearching ? _buildSearchList() : _buildList(),
),
);
}
List<ChildItem> _buildList() {
return _list.map((contact) => new ChildItem(contact)).toList();
}
List<ChildItem> _buildSearchList() {
if (_searchText.isEmpty) {
return _list.map((contact) => new ChildItem(contact))
.toList();
}
else {
List<String> _searchList = List();
for (int i = 0; i < _list.length; i++) {
String name = _list.elementAt(i);
if (name.toLowerCase().contains(_searchText.toLowerCase())) {
_searchList.add(name);
}
}
return _searchList.map((contact) => new ChildItem(contact))
.toList();
}
}
Widget buildBar(BuildContext context) {
return new AppBar(
centerTitle: true,
title: appBarTitle,
actions: <Widget>[
new IconButton(icon: actionIcon, onPressed: () {
setState(() {
if (this.actionIcon.icon == Icons.search) {
this.actionIcon = new Icon(Icons.close, color: Colors.white,);
this.appBarTitle = new TextField(
controller: _searchQuery,
style: new TextStyle(
color: Colors.white,
),
decoration: new InputDecoration(
prefixIcon: new Icon(Icons.search, color: Colors.white),
hintText: "search...",
hintStyle: new TextStyle(color: Colors.white)
),
);
_handleSearchStart();
}
else {
_handleSearchEnd();
}
});
},),
]
);
}
void _handleSearchStart() {
setState(() {
_isSearching = true;
});
}
void _handleSearchEnd() {
setState(() {
this.actionIcon = new Icon(Icons.search, color: Colors.white,);
this.appBarTitle =
new Text("search", style: new TextStyle(color: Colors.white),);
_isSearching = false;
_searchQuery.clear();
});
}
}
class ChildItem extends StatelessWidget {
final String name;
ChildItem(this.name);
@override
Widget build(BuildContext context) {
return new ListTile(title: new Text(this.name));
}
}
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: HomePage(),
);
}
}
class HomePage extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("Search Example"),
actions: [
IconButton(
icon: Icon(Icons.search),
onPressed: () {
showSearch(context: context, delegate: SearchItem());
}),
],
),
);
}
}
final List<String> myList = [
"google",
"IOS",
"Android",
"Linux",
"MacOS",
"Windows"
];
class SearchItem extends SearchDelegate<String> {
@override
List<Widget> buildActions(BuildContext context) {
return [
IconButton(
icon: Icon(Icons.clear),
onPressed: () {
query = "";
})
];
}
@override
Widget buildLeading(BuildContext context) {
return IconButton(
icon: AnimatedIcon(
icon: AnimatedIcons.menu_arrow,
progress: transitionAnimation,
),
onPressed: () {
close(context, null);
});
}
@override
Widget buildResults(BuildContext context) {}
@override
Widget buildSuggestions(BuildContext context) {
final suggestionsList = query.isEmpty
? myList
: myList
.where((p) => p.toLowerCase().contains(query.toLowerCase()))
.toList();
return ListView.builder(
itemBuilder: (context, index) => ListTile(
onTap: () {
close(context, suggestionsList[index]);
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => DetailScreen(myList
.indexWhere((item) => item == suggestionsList[index]))));
},
title: Text(suggestionsList[index]),
),
itemCount: suggestionsList.length,
);
}
}
class DetailScreen extends StatelessWidget {
final int index;
DetailScreen(this.index);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text("${myList[index]}"),),
body: Center(
child: Text(
"${myList[index]}",style: TextStyle(fontSize: 22),
),
));
}
}
导入“包装:颤振/材料.省道”;
void main()=>runApp(MyApp());
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(
debugShowCheckedModeBanner:false,
主页:主页(),
);
}
}
类主页扩展了无状态小部件{
@凌驾
小部件构建(构建上下文){
返回脚手架(
appBar:appBar(
标题:文本(“搜索示例”),
行动:[
图标按钮(
图标:图标(Icons.search),
已按下:(){
showSearch(上下文:context,委托:SearchItem());
}),
],
),
);
}
}
最终列表myList=[
“谷歌”,
“IOS”,
“安卓”,
“Linux”,
“MacOS”,
“窗口”
];
类SearchItem扩展了SearchDelegate{
@凌驾
列出buildActions(BuildContext上下文){
返回[
图标按钮(
图标:图标(图标。清除),
已按下:(){
query=“”;
})
];
}
@凌驾
小部件buildLeading(BuildContext上下文){
返回图标按钮(
图标:动画指令(
图标:animateDictions.menu\u箭头,
进展:过渡化,
),
已按下:(){
关闭(上下文,空);
});
}
@凌驾
小部件buildResults(BuildContext上下文){}
@凌驾
小部件构建建议(构建上下文){
final suggestionsList=query.isEmpty
?myList
:myList
.where((p)=>p.toLowerCase().contains(query.toLowerCase()))
.toList();
返回ListView.builder(
itemBuilder:(上下文,索引)=>ListTile(
onTap:(){
关闭(上下文、建议列表[索引]);