主要是二級分類的UI佈局json
1分15秒app
定義list變量async
開始寫裏面的子項,把每個小的寫了 再拼成一個大的ide
這樣咱們的小類就寫完了佈局
開始寫個人大類別:是一個橫向的ListView。寫橫向的ListView就必須設置寬和高字體
ListView若是是縱向的不須要設置高度,若是是橫向的就必須設置寬和高優化
這裏使用構造器的形式,動態構造。ListView.builder()ui
大類的代碼:spa
調用咱們的大類3d
佈局的劃分:最外層用Row,右側用上下佈局Column
出來了可是效果比較醜,還須要優化
增長樣式修飾
import 'package:flutter/material.dart'; import '../service/service_method.dart'; import 'dart:convert'; import '../model/category.dart'; import 'package:flutter_screenutil/flutter_screenutil.dart'; class CategoryPage extends StatefulWidget { @override _CategoryPageState createState() => _CategoryPageState(); } class _CategoryPageState extends State<CategoryPage> { @override Widget build(BuildContext context) { //_getCategory(); return Scaffold( appBar: AppBar(title: Text('商品分類'),), body: Container( child: Row( children: <Widget>[ LeftCategoryNav(), Column( children: <Widget>[ RightCategoryNav() ], ) ], ), ), ); } } //左側大類導航 class LeftCategoryNav extends StatefulWidget { @override _LeftCategoryNavState createState() => _LeftCategoryNavState(); } class _LeftCategoryNavState extends State<LeftCategoryNav> { List list=[]; @override void initState() { super.initState(); _getCategory();//請求接口的數據 } @override Widget build(BuildContext context) { return Container( width: ScreenUtil().setWidth(180), decoration: BoxDecoration( border: Border( right: BorderSide(width:1.0,color: Colors.black12),//有邊框 ) ), child: ListView.builder( itemCount: list.length, itemBuilder: (contex,index){ return _leftInkWell(index); }, ), ); } Widget _leftInkWell(int index){ return InkWell( onTap: (){}, child: Container( height: ScreenUtil().setHeight(100), padding: EdgeInsets.only(left:10.0,top:10.0), decoration: BoxDecoration( color: Colors.white, border: Border( bottom: BorderSide(width: 1.0,color: Colors.black12) ) ), child: Text( list[index].mallCategoryName, style: TextStyle(fontSize: ScreenUtil().setSp(28)),//設置字體大小,爲了兼容使用setSp ), ), ); } void _getCategory() async{ await request('getCategory').then((val){ var data=json.decode(val.toString()); //print(data); CategoryModel category= CategoryModel.fromJson(data); setState(() { list=category.data; }); //list.data.forEach((item)=>print(item.mallCategoryName)); }); } } class RightCategoryNav extends StatefulWidget { @override _RightCategoryNavState createState() => _RightCategoryNavState(); } class _RightCategoryNavState extends State<RightCategoryNav> { List list = ['名酒','寶丰','北京二鍋頭','捨得','五糧液','茅臺','散白']; @override Widget build(BuildContext context) { return Container( height: ScreenUtil().setHeight(80), width: ScreenUtil().setWidth(570),//總的寬度是750 -180 decoration: BoxDecoration( color: Colors.white,//白色背景 border: Border( bottom: BorderSide(width: 1.0,color: Colors.black12)//邊界線 ) ), child: ListView.builder( scrollDirection: Axis.horizontal, itemCount: list.length, itemBuilder: (context,index){ return _rightInkWell(list[index]); }, ), ); } Widget _rightInkWell(String item){ return InkWell( onTap: (){},//事件留空 child: Container(//什麼都加一個container,這樣好佈局 padding: EdgeInsets.fromLTRB(5.0, 10.0, 5.0, 10.0),//上下是10 左右是5.0 child: Text( item, style:TextStyle(fontSize: ScreenUtil().setSp(28)), ), ), ); } }