huixiang_app/lib/vip/vip_page.dart

import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
import 'package:huixiang/retrofit/data/vip_card_home.dart';
import 'package:huixiang/view_widget/classic_header.dart';
import 'package:huixiang/vip/vip_view/exclusive_coupon.dart';
import 'package:huixiang/vip/vip_view/vip_goods_discount.dart';
import 'package:huixiang/vip/vip_view/vip_top.dart';
import 'package:pull_to_refresh/pull_to_refresh.dart';
import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:shared_preferences/shared_preferences.dart';

import '../retrofit/data/base_data.dart';
import '../retrofit/retrofit_api.dart';
import '../view_widget/my_appbar.dart';


class VipPage extends StatefulWidget {

  VipPage(Key key): super(key: key);
  @override
  State<StatefulWidget> createState() {
    return _VipPageState();
  }
}

class _VipPageState extends State<VipPage> with AutomaticKeepAliveClientMixin {
  final RefreshController _refreshController = RefreshController();
  ApiService apiService;
  VipCardHome vipHome;


  @override
  void dispose() {
    super.dispose();
    if (_refreshController != null) _refreshController.dispose();
  }

  @override
  void initState() {
    super.initState();
    queryVipHome();
  }

  queryVipHome() async {
    try{
      if (apiService == null) {
        SharedPreferences value = await SharedPreferences.getInstance();
        apiService = ApiService(
            Dio(),
            context: context,
            token: value.getString("token"),
            showLoading: true
        );
      }
      BaseData<VipCardHome> baseData =
      await apiService.vipCardIndex().catchError((onError) {
        _refreshController.refreshFailed();});
      if (baseData != null && baseData.isSuccess) {
        vipHome = baseData.data;
        _refreshController.refreshCompleted();
      }else{
        _refreshController.refreshFailed();
        SmartDialog.showToast(baseData.msg ?? "", alignment: Alignment.center);
      }
    }finally{
      setState((){});
    }
  }

  @override
  Widget build(BuildContext context) {
    super.build(context);
    return Scaffold(
      backgroundColor: Color(0xFFF9FAF7),
      body: Container(
        padding: EdgeInsets.only(bottom: 76.h),
        child: SmartRefresher(
          controller: _refreshController,
          enablePullDown: true,
          enablePullUp: false,
          header: MyHeader(),
          physics: BouncingScrollPhysics(),
          onRefresh: () {
            queryVipHome();
          },
          child: SingleChildScrollView(
            child: Container(
              child:Column(
                mainAxisAlignment: MainAxisAlignment.start,
                crossAxisAlignment: CrossAxisAlignment.start,
                children: [
                  VipTop(vipHome,(){
                    queryVipHome();
                  }),

                  if(vipHome !=null)
                    VipGoodsDiscount(vipHome),

                  ExclusiveCoupon(),
                ],
              ),
            ),
          ),
        ),
      ),
    );
  }

  @override
  bool get wantKeepAlive => true;
}