Flutter3 TV 一百行自定义实现 tabbar tabview 联动
系统自带的 tabbar 焦点 在 TV端无法很好的使用
- 使用card_swiper 组件作为tabview
import 'package:card_swiper/card_swiper.dart'; import 'package:flutter/material.dart'; void main() => runApp(MyApp()); class MyApp extends StatefulWidget { const MyApp({super.key}); @override State<StatefulWidget> createState() => _MyAppState(); } class _MyAppState extends State<MyApp> { List<String> tabs = ['推荐', '最新', '电影', '动漫', '综艺', '少综', '分类']; int selectedIndex = 0; late List<BoxDecoration> _decorations; final BoxDecoration holder_decoration = BoxDecoration( border: Border.all(width: 3, color: Colors.deepOrange), borderRadius: BorderRadius.all( Radius.circular(5), ), ); final BoxDecoration transparent_decoration = BoxDecoration( border: Border.all(width: 3, color: Colors.transparent), borderRadius: BorderRadius.all( Radius.circular(5), ), ); final SwiperController _controller = new SwiperController(); @override Widget build(BuildContext context) { return MaterialApp( home: Scaffold( body: Container( padding: EdgeInsets.only(top: 30), child: Container( child: Column( children: [ Row( children: List.generate( tabs.length, (i) => Expanded(child: focusCard(i)), ), ), Expanded( child: Container( decoration: BoxDecoration(color: Colors.white), child: Swiper( itemCount: tabs.length, itemBuilder: (BuildContext context, int i) => MyCustomWidget(index: i), loop: false, controller: _controller, ), ), ) ], ), ), ), ), ); } Widget focusCard(index) { return Focus( onFocusChange: (focused) { setState(() { _decorations[index] = focused ? holder_decoration : transparent_decoration; _controller.move(index); }); }, child: Container( padding: EdgeInsets.only(left: 20, right: 20, bottom: 10), decoration: _decorations[index], margin: EdgeInsets.all(2), child: Text(tabs[index]), ), ); } } class MyCustomWidget extends StatefulWidget { final int index; const MyCustomWidget({super.key, required this.index}); @override State<MyCustomWidget> createState() => _MyCustomWidgetState(); } class _MyCustomWidgetState extends State<MyCustomWidget> { int selectedIndex = -1; final BoxDecoration holder_decoration = BoxDecoration( border: Border.all(width: 3, color: Colors.deepOrange), borderRadius: BorderRadius.all( Radius.circular(5), ), ); final BoxDecoration transparent_decoration = BoxDecoration( border: Border.all(width: 3, color: Colors.transparent), borderRadius: BorderRadius.all( Radius.circular(5), ), ); @override Widget build(BuildContext context) { return Row( children: [ Expanded( child: focusCard(0), ), Expanded( child: Column( children: [ Expanded( child: focusCard(1), ), Expanded( child: focusCard(2), ), ], ), ), Expanded( child: Column( children: [ Expanded( child: focusCard(3), ), Expanded( child: focusCard(4), ), ], ), ), ], ); } Widget focusCard(index) { return Focus( onFocusChange: (focused) { setState(() { selectedIndex = focused ? index : selectedIndex; }); }, child: Container( decoration: index == selectedIndex ? holder_decoration : transparent_decoration, margin: EdgeInsets.all(2), child: Card( child: Center( child: Text( index == selectedIndex ? '${widget.index}_${index}_Focused' : '${widget.index}_${index}_UnFocused', ), ), ), ), ); } }
本文来自博客园,作者:vx_guanchaoguo0,转载请注明原文链接:https://www.cnblogs.com/guanchaoguo/p/17989687
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