farmer_client/lib/pages/infomation/index.dart

import 'package:farmer_client/pages/infomation/widgets/Information/index.dart';
import 'package:farmer_client/widgets/layout/BasicPage.dart';
import 'package:flutter/material.dart';
import 'package:flutter_easyloading/flutter_easyloading.dart';
import 'package:flutter_easyrefresh/easy_refresh.dart';
import 'package:fluttertoast/fluttertoast.dart';
import 'package:get/get_rx/src/rx_types/rx_types.dart';
import 'package:get/get_state_manager/get_state_manager.dart';

import '../../models/entities/NewsInformationModel.dart';
import '../../services/news.dart';
import '../../widgets/NullCard.dart';

class Infomation extends BasicPage {
  // List<NewsInformationModel> newsListItem=[];

  Infomation({Key? key}) : super(key: key) {
    tabIndex = 2;
    naviTitle = '资讯';
  }
  EasyRefreshController _controller = EasyRefreshController();

  final newsListItem = Rx<List<NewsInformationModel>>([]);
  final addNewOrderList = Rx<List<NewsInformationModel>>([]);
  var pageIndex = 1; //页数
  var count = 10; //每页10条
  late int maxSum; //最多条数
  int _count = 0;
  Map<String, dynamic> params = {'pageNum': 1};
  @override
  void beforeShow() {
    // TODO: implement beforeShow
    super.beforeShow();
    // EasyLoading.show(status: '数据加载中...');
    //
    // getNewsList(params).then((value) {
    //   final list = <NewsInformationModel>[];
    //
    //   value['records'].forEach((item) {
    //     list.add(NewsInformationModel.fromJson(item));
    //     print('newsListItem');
    //
    //     print(newsListItem.value);
    //   });
    //   newsListItem.value = list;
    //   EasyLoading.dismiss();
    //
    // });
  }

  void getNewData() {
    pageIndex = 1;
    params['pageNum'] = pageIndex;
    print(params['pageNum']);
    getNewsList(params).then((value) {
      maxSum = value['total'];

      List<NewsInformationModel> list = [];
      value['records'].forEach((item) {
        list.add(NewsInformationModel.fromJson(item));
      });
      newsListItem(list);
      addNewOrderList(list);
      _count = newsListItem.value.length;
    });
  }

  void getMoreData() {
    pageIndex++;
    params['pageNum'] = pageIndex;
    print(params['pageNum']);
    getNewsList(params).then((value) {
      maxSum = value['total'];
      List<NewsInformationModel> list = [];
      List<NewsInformationModel> Newlist = [];
      value['records'].forEach((item) {
        list.add(NewsInformationModel.fromJson(item));
      });
      addNewOrderList.value.addAll(list);
      Newlist.addAll(addNewOrderList.value);
      newsListItem(Newlist);
      _count = newsListItem.value.length;
    });
  }



  @override
  Widget builder(BuildContext context) {
    return EasyRefresh(
      controller: _controller,
      firstRefresh: true,
      onRefresh: () async {
        await Future.delayed(Duration(seconds: 1), () {
          print("下拉刷新-----");
          getNewData();
          _controller.resetLoadState();
        });
      },
      onLoad: () async {
        await Future.delayed(Duration(seconds: 1), () {
          if (_count == maxSum) {
            Fluttertoast.showToast(msg: '暂无更多资讯哦');
          } else {
            getMoreData();
          }
          _controller.finishLoad(noMore: _count >= maxSum);

        });
      },
      child: Obx(
            () => newsListItem.value.length > 0
            ?
        Column(
          mainAxisSize: MainAxisSize.min,
          children: newsListItem.value
              .map((item) => Information(item: item))
              .toList(),
        ): NullCard(text: '暂无资讯！'),
      ),
    );
      // Container(
      //   child: Obx(() => Column(
      //         mainAxisSize: MainAxisSize.min,
      //         children: newsListItem.value
      //             .map((item) => Information(
      //                   item: item,
      //                 ))
      //             .toList(),
      //       )));
  }
}