Flutter是谷歌的移動UI框架,能夠快速在iOS和Android上構建高質量的原生用戶界面。git
IT界著名的尼古拉斯·高爾包曾說:輪子是IT進步的階梯!熱門的框架千篇一概,好用輪子萬里挑一!Flutter做爲這兩年開始崛起的跨平臺開發框架,其第三方生態相比其餘成熟框架還略有不足,但輪子的數量也已經不少了。本系列文章挑選平常app開發經常使用的輪子分享出來,給你們提升搬磚效率,同時也但願flutter的生態愈來愈完善,輪子愈來愈多。github
本系列文章準備了超過50個輪子推薦,工做緣由,儘可能每1-2天出一篇文章。markdown
tip:本系列文章合適已有部分flutter基礎的開發者,入門請戳:flutter官網app
dependencies: curved_navigation_bar: ^0.3.1 複製代碼
import 'package:curved_navigation_bar/curved_navigation_bar.dart'; 複製代碼
默認示例:框架
Scaffold( bottomNavigationBar: CurvedNavigationBar( backgroundColor: Colors.blueAccent, items: <Widget>[ Icon(Icons.add, size: 30), Icon(Icons.list, size: 30), Icon(Icons.compare_arrows, size: 30), ], onTap: (index) { //Handle button tap }, ), body: Container(color: Colors.blueAccent), ) 複製代碼
與TabBarView一塊兒聯動使用ide
class CurvedNavigationBarDemo extends StatefulWidget { CurvedNavigationBarDemo({Key key}) : super(key: key); @override _CurvedNavigationBarDemoState createState() => _CurvedNavigationBarDemoState(); } class _CurvedNavigationBarDemoState extends State<CurvedNavigationBarDemo> with SingleTickerProviderStateMixin{ TabController tabController; List colors=[Colors.blue,Colors.pink,Colors.orange]; int currentIndex=0; @override void initState() { // TODO: implement initState super.initState(); tabController = TabController(vsync: this, length: 3)..addListener((){ setState(() { currentIndex=tabController.index; }); }); } @override Widget build(BuildContext context) { return Scaffold( bottomNavigationBar: CurvedNavigationBar( backgroundColor: colors[currentIndex], index: currentIndex, items: <Widget>[ Icon(Icons.home, size: 30), Icon(Icons.fiber_new, size: 30), Icon(Icons.person, size: 30), ], onTap: (index) { //Handle button tap setState(() { currentIndex=index; }); tabController.animateTo(index,duration: Duration(milliseconds: 300), curve: Curves.ease); }, ), body: TabBarView( controller: tabController, children: <Widget>[ Container( color: colors[0], ), Container( color: colors[1], ), Container( color: colors[2], ) ], ) ); } } 複製代碼