65281

地区选择-三级联动

1.

city_pickers: ^0.0.1

  

import 'package:city_pickers/city_pickers.dart';

2. 

class TabsPage extends StatefulWidget{ @override _TabsPageState createState() => new _TabsPageState(); } class _TabsPageState extends State<TabsPage> with SingleTickerProviderStateMixin{ TabController _tabController; String cityName; //初始化,一加载便会触发该方法 void initState(){ cityName='杭州'; super.initState(); _tabController = new TabController( vsync: this, length: 2, ); } Widget build(BuildContext context){ //初始化 ScreenUtil.instance = ScreenUtil(width: 750, height: 1334)..init(context); return DefaultTabController( length: 2, child: Scaffold( appBar: appBar(), ), ); } Widget appBar(){ return AppBar( centerTitle: true, leading: Builder( builder: (context) => GestureDetector( child: Padding( padding: EdgeInsets.all(8.0), child: IconButton( icon: Icon(Icons.person), onPressed: null, ) ), onTap: () => Scaffold.of(context).openDrawer(), ), ), title: Container( child: FlatButton( // color: Colors.yellow, child: Row( mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[ Text( '$cityName', style: TextStyle( color: Colors.black, fontSize: ScreenUtil.getInstance().setSp(30) ), textAlign: TextAlign.left, ), IconButton( alignment: Alignment.centerLeft, icon: Icon( Icons.arrow_drop_down, color: Color.fromRGBO(46, 48, 56, 1), ), onPressed: (){ debugPrint('down'); }, ) ], ), onPressed: (){ show(context); }, ), ), ); }   //调用三级联动 show(BuildContext context) async { Result result = await CityPickers.showCityPicker( context: context, ); print(result); setState(() { this.cityName = result.cityName; }); } }

  

  

来源:博客园

作者:笑话如人

链接:https://www.cnblogs.com/xhrr/p/11425608.html

Recommend