When clicking on the image they change color, it just doesn't change if you drag with your finger, could someone help me with the icons change color when the user also wants to drag with the finger, this below is the code.
SliverOverlapAbsorber(
handle: NestedScrollView.sliverOverlapAbsorberHandleFor(
context),
sliver: SliverAppBar(
pinned: true,
floating: true,
automaticallyImplyLeading: false,
forceElevated: innerBoxIsScrolled,
bottom: TabBar(
onTap: (value) {
WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
setState(() {
index=value;
});
});
},
tabs: [
Tab(
icon: SizedBox(
height: 25,
child: Image.asset(
AppImages.fix,
color:
index == 0 ? Colors.white : Colors.blue,
),
),
),
Tab(
icon: SizedBox(
height: 25,
child: Image.asset(
AppImages.home,
color:
index == 1 ? Colors.white : Colors.blue,
),
),
),
],
),
),
),
CodePudding user response:
Please have a look at the official documentation on how to implement TabBar
:
https://api.flutter.dev/flutter/material/TabBar-class.html
CodePudding user response:
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
return Scaffold(
body: DefaultTabController(
length: 2,
child: Builder(
builder: (context) {
final TabController tabController =
DefaultTabController.of(context)!;
tabController.addListener(() {
if (!tabController.indexIsChanging) {
setState(() {});
}
});
return NestedScrollView(
headerSliverBuilder: (context, innerBoxIsScrolled) {
return [
SliverOverlapAbsorber(
handle: NestedScrollView.sliverOverlapAbsorberHandleFor(
context),
sliver: SliverAppBar(
pinned: true,
floating: true,
automaticallyImplyLeading: false,
forceElevated: innerBoxIsScrolled,
bottom: TabBar(tabs: [
Tab(
icon: Icon(
Icons.home,
color: tabController.index == 0
? Colors.red
: Colors.white,
),
),
Tab(
icon: Icon(
Icons.light,
color: tabController.index == 1
? Colors.red
: Colors.white,
),
),
]),
),
)
];
},
body: TabBarView(
controller: tabController,
children: const [
Center(
child: Text('page 1'),
),
Center(
child: Text('page 2'),
),
],
),
);
},
),
),
);
}
}
A friend of mine helped me